OFFICIAL GAZETTE

OFFICIAL
GAZETTE
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EXTRA No. 121 THURSDAY, NOVEMBER 16, 1950
CABINET
ORDERS
I hereby promulgate the Building Standard Law
Enforcement Order.
Signed: HIROHITO, Seal of the Emperor
This sixteenth day of the eleventh month of
the twenty-fifth year of Showa (November 16, 1950)
Prime Minister
YOSHIDA Shigeru
Cabinet Order No. 338
Building Standard Law Enforcement Order
In accordance with the provisions of the Building
Standard Law (Law No. 201 of 1950), the Cabinet
establishes this Cabinet Order.
Conten ts
Chapter I General Provisions
Section 1 Definition of Words Used and Methods
of Calculation (Articles 1-2)
Section 2 Examination of Qualification for
Building Officials (Articles 3-9)
Section 3 Fees for Application of the Confirmation
(Articles 10-14)
Section 4 Amount of Compensation (Articles
15-18)
Chapter II Structure in General
Section 1 Openings Required for Taking in
Light (Articles 19-20)
Section 2 Ceiling Height, Height of Floor of
Living Room and Methods of Dampproofing
thereof (Articles 21*22)
Section 3 Stairways (Articles 23-27)
Section 4 Latrines and Sewers (Articles 28-35)
Chapter III Strength of Structures
Section 1 General Provisions (Article 36)
Section 2 Structural Materials (Articles 37-39)
Section 3 Wooden Construction (Articles 40-
50)
Section 4 Masonry Constructions (Articles 51-
62)
Section 5 Steel Prame Constructions (Articles
63-70)
Section 6 Reinforced Concrete Construction
(Articles 71-79)
Section 7 Plain Concrete Construction (Article
80)
Section 8 Structural Calculation
_1_
Clause 1 General Provisions (Articles 8182)
Clause 2 Loads and External Forces (Articles
83-88)
Clause-3 Allowable Stress (Articles 89-93)
Section 9 Special Provisions for Structural
Calculation (Articles 94-106)
Chapter IV Fireproof Construction, Fire-resisting'
Construction, Fire-zone, etc.
(Articles 107-116)
Chapter V Facilities for Escape
Section 1 Corridor, Escape Stairways and Exits
(Articles 117-126) •E
Section 2 Passages Necessary for Escape and
Defense Against Fire within Building
Site (Articles 127-129)
Chapter VI Use Zone (Article 130)
Chapter VII Height of Building (Articles 131-
136)-
Chapter VIII Miscellaneous Provisions (Articles
137-143)
Supplementary Provisions
CHAPTER I General Provisions
Section 1 Definition of Words Used and
Methods of Calculation
(Definition of Words Used)
Article 1. In this Cabinet Order, the definition of
the words used in the following items shall b3 as
termed in each item concerned :
(1) Building site: means a parcel of land where
one or more than two buildings occupy which
cannot be separated on account of the use;
(2) Basement: means a story with its floor lower
than ground level but the height from its floor
to ground level is higher than 1/3 of the ceiling
height of that story;
(3) Principal structural parts: mean walls,
columns, trusses, sills, bracings, (angle braces,
materials for horizontal bracings or the like),
or horizontal members of a building, (beams,
girders, or the like) that sustain dead and live
loads, snow load, wind load, earth pressure or
water pressure or impact due to earthquake
and other tremors and vibrations;
(4) Waterproofed materials: mean the building
materials with waterproofing quality such as
brick, stone, artificial stone, concrete, asphalt
chinaware, glass and other similar materials.

(Methods of Calculation of Area, Height, etc.) |
Article 2. The methods of calculation of area,
height and number of story mentioned in the
following items shall be as determined in each
item concerned :
(1) Area of building site: to take the area of
horizontal projection. However, the site in part
between the line considered as the boundary line
of the road and the road as provided for in the
provisions of Article 42 paragraph 2 of the
Building Standard Law (hereinafter referred to
as "Law") shall not be included in the area of
the site;
(2) Building area: to be the area of horizontal
projection of part surrounded by the center
line (in caseN there is a projection exceeding
one meter from the center line concerned as of
eave, pent-roof, balcony, and other similar ones,
the line measured back horizontally from the
edge of the same, 1 meter of exterior walls or
the columns taking place of these in a building
(excluding a part of basement below imaginary
line drawn 1 meter above the ground level) ;
(3) Floor area: to be the area of horizontal
projection of a part surrounded by center line
of walls and other partitions in each floor or its
part of a building;
(4) Total floor area: to be the total of floorarea
of each story of a building except that, in the
case coming under Article 56 paragraph 3 of
the Law, no floor area of basement shall be
included ;
(5) Height of building: to be the height above
the ground level; however, in the case coming
under any one of the following items, it shall
be as provided for in each item concerned;
(a) For calculation of height according to the
provisions of Article 57 or Article 58 of the
Law, it shall be measured from the road
surface at center of the road in front;
(b) In case the total area of horizontal projection
of staircase, elevator towers, decorative
towers, •Ewatch towers, dormer windows and
other similar part above roof of a building is
less than 1/8 of the building area, the height
of that part shall not be counted in determining
the height of building concerned up
to 12 meters;
(c) A part of crest, fire wall projecting above
roof and other similar projections above roof
shall not be counted in determining the height
of the building concerned.
(6) Height of eave: to be the height measured
from ground level to the top of wall supporting
roof truss or horizontal member taking its place;
wall plate or columns;
(7) Number of story: no elevator towers, decorative
towers, watch towers (or a part above roof
of other similar building or storerooms, machine
-2
room of basement and part of other similar
building of which each total horizontal projected
area is less than 1/8 of building area concerned)
shall be counted in number of story, or in case
a part of a building has open inner court, or in
case building site is sloped or stepped and when
number of story differs by parts of these stories,
the longest one shall be taken.
2 Ground level mentioned in preceding item (2),
(5) or (6) means the horizontal face imagined to
exist at the average height where the perimeter
of the building comes in contact with the ground
surface, while in case the location of contact has
the difference of elevation more than 3 meters, it
shall be the horizontal face in average height at
all points where the difference of elevation is
kept within 3 meters.
3 The method of calculation of horizontal projection
for the case coming under paragraph 1 item
(5) (b) or item (7) shall follow the method of ^
calculation of building area of item (2) of the
same paragraph.
Section 2 Examination of Qualification of
Building Official
(Standard for Examination of Qualification)
Article 3. Examinations of qualification of building
official (hereinafter referred to as "examination
of qualification") prescribed in the provisions of
Article 5 of the Law shall be conducted to test
the knowledge and experience on technical matters
of building and regarding laws and ordinance
required for confirmation provided for in the
provisions of Article 6 paragraph 1 of the Law
with respect to all buildings.
(Methods of Examining Qualification)
Article 4. Examination of qualification shall be
conducted based on deliberation of past records
and test.
2 The deliberation of past records mentioned in
the preceding paragraph shall be conducted on
the records of actual performance concerning the
building administration or building construction
work.
3 The test mentioned in paragraph 1 shall be
conducted on the subject matters given in the
following items. However, for person qualified
as first class architect, the test on subject given
in the items (1) to (5) inclusive shall be exempted:
(1) Designing of building;
(2) Planning of building;
(3) Structure of building;
(4) Building materials;
(5) Execution of building construction;
(6) Building Standard Law and Orders based on
Building Standard Law ; ^
(7) Laws and Regulations relating to City Planning
(Law No. 36 of 1919)and Fire Defence Law

(Law No. 186 of 1948) and outline of Orders
based thereon ;
(8) Necessary Knowledge on building administration
other than that mentioned in the preceding
two items.
(Execution of Examination of Qualification)
Article 5. Examination of qualification shall be
executed more thah once every year.
2 The date and time as well as place for taking
examination of qualification shall be announced to
the public by the Minister of Construction through
the Official Gazette beforehand.
(Granting of Certificate of Passing Examination)
Article 6. Minister of Construction shall grant the
certificate of passing the examination of qualification
for building officials to those persons who
have passed the examination of qualification.
(Fixed Number of Members of Committee for
Examination" of Qualification)
Article 7. Number of members of the Committee
for Examination of Qualification for building
officials shall be not more than 10.
(Duty and Service of Members of Committee for
Examination of Qualification)
Article 8. The members of Committee of Examination
of Qualification shall be of part-time service.
(Entrusting to Ministerial Ordinance) •E
Article 9. The procedures regarding the application
for examination of qualification shall be
determined by Ministry of Construction Ordinance.
Section 3 Fees for Application for Confirmation
(Fees for Application for Confirmation regarding
Buildings)
Article 10. The amount of fees for application for
confirmation provided for in the provisions of
Article 6 paragraph 5 of the Law (including the
case where this applies mutatis mutandis in
Article 87 paragraph 1 of the Law) shall be as
shown in the following table for each separate
case of application for confirmation :
_3-
2 The total floor area mentioned in the Table of
the preceding paragraph shall, in case of building
a building, be calculated on the total floor area
of the parts of building concerned, and in case
of large scale repairing or remodelling or change
of use of a building, it shall be calculated as 1/2
of the total floor area of the part pertaining to
repairing, remodelling or change of use concerned.
(Fees for Application for Confirmation regarding
Structures)
Article ll. The amount of fee for application for
confirmation of structure in accordance with the
provisions of Article 138 shall be ¥500 for each
case of application for confirmation of structure.
(Fee for Confirmation in Case of Combined
Application for Confirmation of Building and
Structure)
Article 12. The amount of fee for application for
confirmation in case of the applications for confirmation
for building and structure in one application
for confirmation shall be determined in
accordance with the amount of fee for application
for confirmation as in the provisions of Article 10
for building concerned,* however, in case its
amount is less than ¥500, it shall be at ¥500.
(Reduction of Fee for Application of Confirmation)
Article 13. In case the administrative agency concerned
deems it necessary for the sake of public
interest due to disasters and other special reasons
may, irrespective of the provisions of the preceding
three Articles reduce the fee for application
for confirmation as provided for by the regulations
of the local public entity concerned.
(Ways of Paying Fee for Application for Confirmation)
Article 14. The ways of paying fee or application
for Confirmation shall be determined by the
regulation of the local public entity concerned.
Section 4 Amount of Compensation
(Application for Decision of Expropriation
Council)
Article 15. Person (hereinafter referred to as
"applicant") who intends to request the decision
of Expropriation Council in accordance with the
provisions of Article ll paragraph 3 of the Law
(including the case where this applies mutatis
mutandis in Article 88 of the Law) shall submit
to the Expropriation Council on application inscribed
with the matters enumerated below through
the hand of the governor of To, Do, Fu or prefecture
where the building concerned is located :
(1) Name and address of the applicant;
(2) Place where the building is located;
(3) Rights possessed by the applicant regarding
the building concerned ;
(4) Use and brief description of structure of the

uilding, plot plan, block plan and floor plan of
each story; however, the items not concerned
with the disposal ordered may be omitted ;
(5) Disposal ordered by the Special Administrative
Agency in accordance with the provision
of Article ll paragraph 1 of the Law;
(6) Notified amount of compensation and the
date when the notice was received;
(7) The objectionable reasons against the amount
of the notified compensation and the amount
that applicant requests and particulars thereof ;
(8) Excluding the matters that the applicant
deems necessary in addition to those enumerated
in the preceding items.
2 In case the applicant submits an application in
accordance with the provisions of the preceding
paragraph, one copy of the application mentioned
in the said paragraph shall be submitted to the
governor of To, Do, Fu or prefecture mentioned
in the preceding paragraph.
(Written Opinion Submitted)
Article 16. When the governor of To, Do, Fu or
prefecture receives the application in accordance
with the provision of paragraph 2 of the preceding
Article one of the copies shall be sent without
delay to the head of city, town or village where
the building concerned is located.
2
The head of city, town or village who receives
a copy of application prescribed in the provision
of the nrecedine paragraph shall, within 10 days
from the date of receipt of the same, prepare his
written opinion for the application concerned
which shall be submitted to the Expropriation
Council.
(Expropriation Council in Session)
Article 17. The governor of To, Do, Fu or prefecture
shall, within the period of time reckoning
two weeks after submitting of the application in
accordance with the provision of Article 15 but
not exceeding one month, call the meeting of
Expropriation Council.
(Sending of Attested Copy of Written Decision)
Article 18. In case the governor of To, Do, Fu or
prefecture receives the report of the decision
from the Expropriation Council, the attested
copies of the written decision shall be delivered
to the applicant and the head of city, town or
village where the building concerned is located.
CHAPTER
II
Structure in General
Section 1 Openings Required for Taking in
Light
(Taking in Light to Living Rooms of School,
Hospital, Dormitory, etc.)
Article 19. The ratio of area of part effective for
taking in light by means of windows and other
openings in living room of school, hospital,
medical office, dormitory or lodging house, etc.
prescribed by the provisions of Article 28 paragraph
1 of the Law to the area of that floor shall
be larger than that as specified by the following
table for each case:
(Method of Calculating Effective Area)
Article 20. The effective area for lighting by means
of windows and other openings (hereinafter referred
to as "opening" in this Article) of living
room prescribed in the provisions of Article 28
paragraph 1 of the Law shall be calculated at the
part of opening falling under each of the following
items:
(1) In respect to the part of "opening" facing
the boundary line of adjacent lot or other
building or other part of the building concerned
within the same lot, the distance from each
part directly above the opening in question of
the building (if there is recession from perpendicular
face directly above the opening, or
projecting part to include such part, and if
there is semi-transparent pent roof or other
pent roof not obstructing for taking in light,
such shall be excluded) measured horizontally
to the boundary line of adjacent lot or to
opposite part of the building or other part of
building concerned in the same lot, and the
ratio of the measured distance to the vertical
distance from the part in question to the opening
in question to be larger than that given in
the following table :
(2) In respect to the opening facing the boundary
line of adjacent lot in a zone or district given
in item (2) or item (3) of the table of the
preceding item or other building or other part
of building concerned in the same lot that the
~-f
4

horizontal distance prescribed in said item to
be more than 5 meters;
(3) Part of opening facing the road, (in cityplanning
district, road under the provision of
Article 42 of the Law; hereinafter the same)
park, open space, river, or vacant lot or surface
of water.
2 Part of area of sky-light effective for light shall,
in regard to the application of the provisions of
Article 28 paragraph 1 of the Law, b3 taken as 3
times the area of that part.
3 In case there is on.the outside of an opening a
verandah wider than 90 cm., or other of the
similar construction (excluding open verandah or
the like), the application of the provisions of
Article 28 paragraph 1 of the Law regarding the
effective area of lighting of that part shall be
considered as 7/10 of area of that part.
Section 2 Ceiling Height, Height of Floor
and the Method of Damp-proofing
thereof
(Ceiling Height of Living Room)
Article 21. Ceiling height of a living room shall
be more than 2.1m.
2 Class room of a school (excluding various schools
and kinder gartens) which floor area exceeds.
50 sq.m. the height of ceiling shall be 3m. or
over irrespective of the provisions of the preceding
paragraph.
3 Where the floor area for seating space for
theater, cinema, show-house, place of review,
auditorium or meeting place exceeds 200 sq. m.
the ceiling height shall be more than 4m. irrespective
of the provision of paragraph 1, except
in case there is mechanical ventilating devise
installed.
4 Ceiling height of each preceding paragraph shall
be measured from the level of the room. Where
there are several ceiling heights in the same
room, average height shall be taken as its ceiling
height.
(Height of Floor of Living Room and"the Method
of Damp-proofing)
Article 22. Height of floor and the damp-proofing
methods for the case where the floor of living
room in the lowest story is built of wood, it
shall be done according to the provisions of the
following items, except in cases where plain
concrete or Tataki or other means corresponding
thereto of disposal effective for damp-proofing are
placed below floor :
(1) The height floor shall be more than 45cm.
measured from ground level directly below and
to the top of floor level;
(2) In exterior walls below floor level, holes with
area of 300sq. cm. or over for the purpose of
ventilation shall be provided at every or less
than 5m. measured along the length of wall,
and they shall be provided with means to
prevent rats from going there.
Section 3 Stairways
(Width of Stairways and of its Landing, as well
as Dimension of Rise and Tread thereof)
Article 23. The width of stairways and its landing,
as well as the dimensions of rise and tread thereof
shall be as shown in the following table.
However, the width of exterior stairways shall be
60 cm. or over, and stairways (excluding stairs in
apartment for common use) for use of residence
may have its rise 23cm.or less and tread 15cm.
or over:
2 The dimension of tread of part forming circular
stairs shall be measured at point 30 cm. from the
end with the least width of tread.
(Location and Tread-length of Landing)
Article 24. Stairways coming under item 1) or
item 2) of the table given in paragraph1 of the
-5

preceding Article, and having their height more
than 3 meters shall be provided with landings so
arranged to come at point less than 3 meters;
other kind of stairs having height exceeding 4
meters shall be provided with landings so arranged
to come at point less than 4 meters.
2 Tread-length of landing mentioned in the preceding
paragraph for straight stairs in accordance
with the preceding provision shall be 1.2 meters
or over.
(Railings for Stairways and Landings)
Article 25. In case both sides of stairs and landings
are not provided with side walls or with
other means to take place thereof, they shall be
provided with hand railings.
2 For stairways with width exceeding 3 meters
railing shall be provided running through preferably
at middle except for stairs with rise less^
than 15 cm. and tread more than 30cm.
3 The provisions of the preceding two paragraphs
shall not apply for a part of stairways of height
less than 1 meter.
(Ramp in Place of Stairs)
Article 26. The ramp taking place of stairs shall
satisfy the following requirements in each item:
(1) Gradient.not to exceed 1 in 8;
(2) Surface shall either be roughened or shall be
finished with other materials not slippery.
2 The provisions of the preceding 3 Articles (excluding
part concerned with rise and tread) shall
apply mutatis mutandis to the ramp mentioned
in the preceding paragraph.
(Stairways Solely for Special Use)
Article 27. The provisions of Article 23 to Article
25 inclusive shall not apply to the stairs for
elevator machinery room, watch tower, and for
others solely used for special purposes.
Section 4 Latrines and Sewers
-.6-
(Light and Ventilation of Latrine)
Article 28. Latrine shall have window opened
directly to outside air for light and ventilation
except for water closet which has means to take
the place of window.
(Construction of Bail-out Latrines)
Article 29. Construction of bail-out latrines shall
be as specified by the following items:
(1) Soil pipe from urinal, tank for soil water
and the periphery of upper mouth shall be
constructed of waterproof materials, and in case
it is to be constructed of waterproof materials
of osmotic quality, the means to prevent water
leaking shall be made the applying waterproof
cement mortar or similar effective waterproof
construction ;
(2) Space below latrine shall be separated from
other parts by finishing with waterproof materials;
(3) Opening for bailing out shall not face directly
a road with its lower part fixed at 10cm. of
over above ground level, and it shall be provided
with tight fitted door;
(4) The space 30cm. to front and right and left
sides of bail-out opening, the ground shall be
covered with plain concrete, Tataki or other
similar materials.
(Structure of Privy Closet in Special Building and
District)
Article 30. In city planning section, the latrines
for school, hospital, theater, cinema, showhouse,
place for review, auditorium, meeting house,
department store, hotel, Japanese hotel, dormitory,
railroad station, and buildings for use specified
by the local public entity by its regulations and
public latrines shall be constructed as prescribed
in the following items :
(1) To provide with non-water-penetrating stand
and urinals;
(2) Urinal shall be connected with soil pipe of
non-water-penetrating quality to the soil tank ;
(3) Window and other ventilating opening in
latrine (in case there is no tight closing door
in, latrine, a privy-closet) shall have insect
metallic wire net to keep out flies.
2 In case the local public entity deems that bailout
latrines for building for use given in the
preceding paragraph or buildings in the district
designated by by-law should be replaced by the
improved cess-pool, "Kairyobenso" mentioned in
Article 31 from standpoint of sanitation, and that
it can be maintained effectively, it may require
to install Kairyobenso instead by the same bylaw.
(Construction of "Kairyobenso")
Article 31. "Kairyobenso" shall be according to
the requirements given in the following items,
excepting those having special structural quality
which the administrative agency concerned recognizes
as having equivalent or superior effect
from stand point of sanitation :
(1) Soil tank will be tank composed of retaining
chamber and bail-out chamber in combination;
(2) Ceiling, bottom, side walls and partition
walls of soil tank shall be constructed of water-
•E proof materials and shall be finished with
waterproof mortar or by similar equally effective
waterproofing methods to prevent any
water leakage ;
(3) Retaining chambers shall be composed of
two or more chambers with part to keep soil
water at depth of 80cm. or more at the same
time its volume to be more than 0.75 cu,m.,
and so arranged that soil water may be retained
over 100 days;
(4) There shall be provided proper sized opening
in the retaining chamber for purposes^of cleaning
thereof, and it shall be installed as tight
fit;
V

(5) The end of soil pipe from urinal shall enter
retaining chamber at a point 40cm. or more
below the surface of retaining soil water.
(Soil Disposal Tank for Water-closet)
Article 32. Soil disposal tank under the provisions
of Article 31 paragraph 2 of the Law shall be so
constructed as required by each item given below
which permits decomposition of the liquefied soil
matters to the extent that it shall not be objectionable
from stand point of sanitation, excepting
those of special construction which the administrative
agency concerned recognizes as having
equivalent or superior clarifying effect as compared
with other accepted ones : •E
(1) Soil disposal tank shall be constructed by
combining the orders of treatment by decomposing
chamber, oxidizing chamber, and
chlorination chamber ;
(2) Ceiling, bottom, side walls, partition walls
shall be constructed of waterproof materials,
and shall be finished by waterproof mortar or
by other equally effective waterproof finishing
safe against any. water leaking ;
(3) Manhole of size with inside diameter 45cm.
or over shall be provided over decomposing
chamber, oxidizing chamber and disinfecting
chamber ;
(4) Decomposing chamber shall be constructed
composed of setting and separating chambers
and primary filtration chamber ;
(5) The depth of part of decomposing chamber
where soil water is retained shall be 1.2 meters
or over, its volume shall be0.75 cu. m., or over
up to the capacity for 15 persons using the
watercloset concerned, and the size to be
enlarged to meet the increase in persons using
proportionately ;
(6) Oxidizing chamber shall be of distributing
filtration type and shall be 'provided with
ventilating equipment such as air drawing pipe
and air supply pipe;
(7) The distance from the bottom of water
sprinkling trough of oxidization chamber to
the top of crushed stone layer shall be more
than 10 cm. the thickness of crushed stone
layer shall be 90cm. or over: the volume of
crushed stone layer shall be more than 1/2 the
volume of part of decomposing chamber where
soil water is retained: the distance from the
bottom of the supporter of crushed stones and
the bottom of the tank shall be 10cm. or over.
(Test for Water Leakage)
Article 33. Tank for Kairyobenso of Article 31 and
soil disposal tank mentioned in the preceding
Article shall be tested for leakage by filling the
tank with water for more than 24 hours.
(Distance from Closet to Well)
Article 34. Tank for bail-out-latrine shall not be
located at distance less than 5 meters from a
-7-
well. However, in enclosed type well which is
covered with fill of 3m. or over below ground
level with water drawing pipe made of water
tight material, or in case of using outside casing
of water tight pipe with inside diameter 25 cm.
or less while water drawing pipe inside thereof
is also made of water tight material, the distance
may be 1.8m. or over.
(Materials for Sewage Pipe, etc.)
Article 35, Sewage pipe, sewage channel or catch
basin and other similar facility prescribed by the
provisions of Article 19 paragraph 3 of the Law
shall be constructed of waterproof materials or
cast iron.
CHAPTER 111 Structural Calculation
Section 1 General Provisions
(Fundamental Principle of "Structural Designing)
Article 36. In making structural designing for a
building, columns, beams, floors, walls, etc. shall
be arranged effectively and safe against dead load, •E
live load, snow load, wind pressure, eartE pressure
and water-pressure and impact of earthquake
and vibrations of earthquake & others
acting on a building according to the kind of its
•Estructural composition.
2 In case a wall as a principal structural part of
a building is considered to resist against the
horizontal force acting on building, such wall
shall be arranged well balanced, so far as it
serves the purpose of use.
3 Principal structural parts of a building shall be
designed as ridged to cause no distortion objectionable
to purpose of use.
4 Footing of a building shall be designed structurally
against unbalanced settlement and freezing.
Section 2 Structural Materials
(Lasting Quality of Structural Materials)
Article 37. A part of timber used in principal
parts from standpoint of lasting quality of structure
that comes in contact with bricks, concrete,
earth or other similar materials of water absorbent
quality (excluding part that comes in
contact with Shinkabe or walls of Dozo construction)
shall be coated with decay protective paint
or make disposal for preventing rotting by effective
means equal to or superior thereof.
2 Part of wall of a building that comes in contact
with earth directiy> excluding such cases as of
gate, fence, storage house, shed or other similar
classes of building shall be constructed of water
proof materials.
3 In case wood piles are used as foundation of a
building, excluding those used for one story
wooden building, they shall be driven down below
the surface of normal level of the standing
water.

(Prevention of Wearing out)
Article 38. In structural part of a building, liable
to get easily worn out, material that resists wear
shall be used or that part shall be covered with
wear resisting materials to prevent any objectionable
trouble.
(Keeping Curtain Wall and Roof Tiles in Place)
Article 39. Curtain wall shall be fixed to the building
frames.
2 Roof tiles shall be so placed that each tile in
two rows along eave and sides and one in every
5 tiles in other parts are fixed to the groundstrips
with copper wire, iron wire or nails, or by
other ways equally effective or better for keeping
them from falling down.
3 Decorative stones, terra cotta and the like shall
be fixed to frames or to walls with bolts, spikes
and other iron wares.
Section 3 Wooden Construction
(Scope of Application)
Article 40. The provisions of this Section shall
apply to part of wooden construction in a wooden
building or building constructed of wooden construction
combined with masonry or other construction
and others, excepting those buildings
such as Chashitsu, Azumaya or the similar buildings,
or storage, shed or the like with total
floor area less than 10 sq.m.
(Timbers or Lumber)
Article 41. Quality of lumber to be used in principal
structural parts shall be free from defects
such as knot, rot, slope of grain, rounded corners,
etc. affecting structural strength.
(Sills)
Article 42. For principal structural column used
in lowest §tory, its base shall be placed on asill,
except in the case where column is firmly tiedto
footing or foot of column or in the case where
one story house is fixed on a base.
2 Sill shall be firmly tied to footing except forone
story building with the total floor area less than
50 sq.m.
(Least Diameter of Column)
Article 43. Least diameter of principal structural
column shall be not less than the ratio shown in
the following table against the perpendicular distance
between each horizontal member of principal
structural part such as sill, base, girt, beam,
girder and other horizontal structural members
that are connected thereto :
-8-

2 In cases where, by regulation and in accordaic.3
with the provisions of Article 41 of the Law,
whole or part of the provision of Article 21 paragraph
1 of the Law is not applicable or in cases
where, the restrictions of the provision of the
same paragraph are to be alleviated by the same
regulation and by supplementing the provisions
of the preceding paragraph, the ratio between
the least diameter of column and the perpendicular
distance of horizontal members shall be
determined.
3 In case more than 1/3 of required cross section
of column calculated on the basis of least diameter
mentioned in the provisions of the preceding
two paragraphs is to be cut out, that part
shall have to be properly rain forced.
4 Corner columns of 2 story building or higher or
columns acting as such shall be one continuous
through-column unless they are properly reinforced
at the joint to give the same or higher
strength than one continuous through-columns.
(Horizontal Members such as Beam, etc.)
Article 44. No objectionable cut on tension side
about the middle of beam, girder or in other
horizontal members shall be allowed.
(Bracing and Joints)
Article 45. Bracing acting as tension member shall
be wood of size larger than 1/5 of column with
which it is in contact or steel far larger than
9 mm. in diameter, or other steel members having
equivalent strength.
2 Bracing acting as compression member shall be
wood of size larger than 1/3 of column with
which it is in contact.
3 Ends of bracing mentioned in the preceding two
paragraphs shall be firmly connected near at the
joints in column, beam or other horizontal member
by means of holt, spike, nails or other irons.
4 Bracing members shall not be cut out.
(Framing Necessary for Strength)
Article 46. In wooden buildings, walls, columns
and horizontal members of principal parts necessary
for structural strength in direction of spacing
of beams and in direction of wall girders of
each story, framings with wall or bracings shall
be arranged well balanced to be safe against
horizontal forces acting in all directions, except in
the case where brackets, column buttress, wall
buttress are provided propejly to stand against
acting forces.
2 In corners of floor frame and roof truss systems
shall use horizontal bracing members and roof
trusses shall be provided with vertical bracings.
3 In wooden buildings of 2 or more stories or
with total floor area exceeding 50 sq.m. the
required length of framing with wall or bracings
laid out in direction of span of beam as well as
direction of side wall girders in each story according
to the provisions of paragraph 1 shall be
-9-
not less than the respective value per 1 sq.m.
of floor area of that story shown in the following
table: However, in the case within the district
where the special administrative agency
designates the seismic constant for horizontal
force at 0.3 or higher in accordance with the
provisions of Article 88 paragraph 3, it shall be
2 times that value.
More than half of the lengths of framing in accordance
with the provisions of the preceding
paragraph shall be framing with bracings in.
The frames in the following table shall, in applying
the provision of the preceding two para
graphs, be considered as having the length
obtained by multiplying each length with double
the value as given in each item concerned:

6)
Frame with wall effective a-
gainst horizontal force such as
earth-plaster wall, plaster on
wooden lath and others
7)
Frame with bracings in item (1)
Sum of
to item (5) inclusive and wall
value of
each item
in item (6) combined
conce rned
(Joints or Connections in Principal Structural
Parts)
Article 47. Connection or joint as principal structural
part shall be tied properly to transmit full
existing stress in that part by using bolts, spikes,
pins or other similar methods.
(Wooden School Building for Elementary or Middle
School)
Article 48. Walls, columns and horizontal members
of wooden school building for elementary or
lower secondary school shall be as prescribed in
the following items except in the case where
they accord with Article 12 of Japanese Building
Specifications "Wooden elementary school (Building
1302)" or with Article 13 of "Wooden lower
secondary school (Building 1303)" as provided for by
the competent Minister. However, school or class
room built by special structural method or other
schools of smaller type that the special administrative
agency recognizes as having equal or
higher strength as compared with those under
these specifications or under the provisions in
each item:
(1) Bracings mentioned in Article 46 paragraph
5 table item (3) shall be used in exterior walls;
(2) In case the distance in direction of side wall
girder is over 12 m. in direction of side wall
girder at interval of 12 m. or less shall have
through partition wall of property spaced bracings
mentioned in Article 46 paragraph 5 table
item (3) unless buttress-columns or buttresswalls
of equal or higher strength are provided
at
(3)
proper space;
Columns beams and trusses shall ba arranged
to be located at distance not exceeding 2 m. in
direction of side wall girder (4 m. in indoor
gymnasium or other large scale room) and columns
and beams or trusses shall be tied firmly
by using bracings of size larger than £ of column;
(4) Column as principal structural part shall be
15 cm. sq. or more or having equivalen
strength. +
(Disposal for Prevention of Rot in Interior of
Exterior Walls)
Article 49. In case whole or part of the exterior
walls of wooden frame is to be finished with cement
mortar on metal lath or ashlared stone
facing and other construction that frames are
easily eaten by rot, water-proofing paper shall be
placed as ground for that part in addition to ap"
plying creosote or other chemical to columns up
0.5
1 m. from ground level, bracings and sills in
that part; provided that the interior of wall in
that part is so constructed as to permit of air
circulation.
(Ashlaring)
Article 50. In building construction with wooden
frames to be faced with stones (including tile
facing and the like, hereinafter the same in this
Article), the thickness* of facing tiles shall be
less than 5 cm. excepting the part up to 1 m.
from the ground level.
2 Facing stones of building mentioned in the preceding
paragraph exceeding 1,5 cm. in thickness
shall be tied to the framesby means of spikes,
copper wire other similar non-corrosive metals to
prevent them from falling off.
Section 4 Masonry Construction
10-
(Scope of Application)
Article 51. The provisions of this Section shall
apply to part of masonry construction in masonry
building such as brick construction, stone construction,
concrete block construction and other
masonry constructions, or part in building constructed
of masonry construction combined with
wooden construction or other. However, the
provisions of this Section shall not apply to part
reinforced by ferro-concrete or by steel shapes
which proved to have equal or higher strength
as compared with those satisfying the provisions
of this Section by structural calculation or by
experiment.
2 The provisions of Article 55 paragraph 2 and
Article 56 of this Section shall not apply to buildings
lower than 4m and at the same time with
its total floor area not over 20 sq.m.
3 To structurally unimportant partition wall of
less than 2 m. high, the provisions of this Section
only from this Article to Article 53 inclusive,
Article 55 paragraph 6 and Article 62 shall apply.
(Execution of Masonry Constructions)
Article 52. Brick, stones and concrete blocks and
other masonry materials to be used in masonry
construction shall be washed well before planning
them.
2 Masonry materials shall be placed so that cement
mortar shall spread evenly over entire face
of its joint.
3 Mortar mentioned in the preceding paragraph
shall be cement mortar, the mixture of cement
and sandbyvolume shall be 1:3 or having
strength equal or superior to this, and cement
mortar with lime shall be in mixture of cement,
lime and sand by volume in the proportion of
1:2:5 or having strength equal or superior to
this.
4 Masonry construction shall be constructed to
prevent straight joint.

(Foot i ng)
Article 53. Footing to receive masonry wall shall
be constructed of mass of plain concrete or reinforced
concrete.
(Length of Wall)
Article 54. No masonry wall shall have its length
over 10 m.
2 Length of wall mentioned in this Section means
the distance center to center of adjacent two
walls measured at parts connected to that wall
(including buttress whose length at part connected
to footing is less than 1/3 of length of wallto
which the buttresses are fixed. Hereinafter referred
to in this Section, as "adjacent opposing
walls").
(Thickness of Wall)
Article 55. Thickness of wall for masonry construction
(not including the thickness of finishing
materials ; hereinafter the same in this Section)
shall bs not less than the value given in the following
table in accordance with the number of
story and the length of that wall (meaning the
length of wall mentioned in paragraph 2 of the
preceding Article) of that building respectively :
(Unit in meter)
2 Thickness of wall of masonry construction in
each story shall be not less than 1/15 of the
height of wall in that story.
3 Thickness of wall for partition of masonry construction
may be 10 cm. less than the thickness
of walls prescribed in the provision of preceding
two paragraphs, provided that the thickness of
its wall is more than 20 cm.
4 The thickness of wall constructed in combination
of stones or stones and other masonry materials
shall be not less than the value of the thickness
of wall prescribed by the provisions of the preceding
3 paragraphs increased by 2/10 of the
thickness of that wall, excepting the steel framing
stone construction.
5 Regarding double-wall masonry building the provisions
of the preceding 4 paragraphs shall apply
to either one wall of that double-wall.
6 Thickness of wall in each story of masonry
building shall be not less than the thickness of
respective upper walls bearing thereon.
7 Regarding the thickness of curtain walls constructed
of masonry in steel frame building, reinforced
concrete construction or steel skeleton
reinforced concrete construction, it shall be considered
as partition upon application of the provision
of this Article.
(Wall Girder)
Article 56. In the wall of masonry building, at the
top of walls in each story (in cases where gable
wall exists, top of wall of said gable) shall be
placed the wall girder constructed of steel frame
structure or reinforced concrete, except in cases
where the reinforced concrete roof or slab etc.
are placed over, or thickness of wall of one story
building is more than 1/10 of height of wall, or
where the length of wall is less than 5 m.
-ll-
(Openings)
Article 57. Opening in walls of masonry building
such as windows, exits, and others shall be as
provided for in following items :
(1) Total width of openings of each wall in
section formed by adjacent-opposing-walls of
each story shall be not more than 1/2 of the
length of that wall;
(2) Total width of openings in each story shall
be not more than 1/3 of the total length of
walls in that story;
(3) Vertical distance from an opening to an,
opening directly above shall be not less than
60cm.
2 Distance between openings in wall of each story
in masonry building, or horizontal distance between
opening and center line of adjacent-opposing-walls
shall be more than twice the thickness
of that wall,
obopening is
excepting
reinforced
the case where periphery
with steel frame or reinforced
concrete.
3 At the top of opening wider than 1 m., reinforced
concrete lintel shall be placed.
4 Bay window or projected verandah of masonry
construction shall be reinforced with stael skeleton
or reinforced concrete.
5 Masonry construction inside of wall fire-place
shall have substantial footing to sustain the weight
of fire-place and the chimney and its upper part
shall not be stepped out. In case of wooden
building it shall be reinforced by steel materials
in addition.
(Channel Cut in Walls)
Article 58. In walls of masonry building, when
vertical channel for continuous distance more
than 3/4 of height of wall of that story is to be
made, depth shall be less than 1/3 of the thick-

ness of the wall, and when horizontal channel is
to be made, its depth shall bs less than 1/3 of
the thickness of wall while the length shall not
exceed 3 meters.
(Wall of Wooden Frame Masonry Construction or
Steel Frame Masonry Construction)
Article 59. Part of masonry construction in the j
wall of wooden frame or steel frame masonry
construction shall be tied firmly into wooden
frame or steel frame with bolts, spikes and other
iron wares.
(Hand Railing and Railing Wall)
Article 60. Hand railing or railing wall shall no*t
be constructed ©f masonry unless its top is tied
by reinforced concrete wall girder.
(Masonry Fence)
Article 61. Masonry fence shall satisfy the following
requirements :
(1) Height shall not exceed 3 m.;
(2) Thickness at any part of wall shall be more
than 1/10 of the height, measured from that
part to the top of that wall;
(3) At every 4 m. or less of the length of wall,
there shall be buttress walls (excluding wooden
construction) projecting out of the face of wall
more than 1.5 times its thickness, of that point
unless the thickness of wall in that part is
more than 1.5 of the wall thickness specified in
the provisions of the preceding item.
(Supports, etc. of Principal Structural Part for
Structural Strength)
Article 62. Principal masonry part shall not be
supported by any part of wooden structure.
Section 5 Steel Frame Construction
(Scope of Application)
Article 63. The provisions of this Section shall apply
to part of steel construction in steel frame
building, steel skeleton reinforced concrete building
or building constructed of steel frame combined
with other construction such as masonry,
etc.
(Materials)
Article 64. No cast iron shall be used in part receiving
stresses other than compression or stress
caused by contact.
(Effective Slenderness Ratio of Compression Member)
Article 65. Effective slenderness ratio (ratio of
buckling,length to the radius of gyration; hereinafter
the same) of steel compression member
(meaning material to take compressive stress;
hereinafter the same) as principal part for structural
strength shall not exceed 200 for column,
250 for members other than column.
(Foot of Column)
Article 66. Foot of column as principal structural
part shall be fixed to footing by anchor bolts
-12-
unless it is firmly fixed to footing by other special
constructions or designed as pin support.
(Joints)
Article 67. Joints of steel shapes as principal
structural part shall either be riveted or welded
joint, except where bolts are permitted to be
used as in the cases given in any of the follow-
I
I
j
i
ing items:
(1) In the case where total weight of steel
shapes used in structural part of a building is
less than 10 tons, and bolted part is embedded
in concrete, or nuts are fixed by welding, or
lock nuts are used so that bolts will not be
loosened ;
(2) In the case where the joint is extremely
difficult for riveting or welding.
2 Joints and connections as the principal structural
part shall, by means of splice piece riveted
or welding, be so constructed that entire stress
existing at that point may be transmitted. In
this case, the end of column shall be perfectly
planed, and when no tension stress is not made
to exist, by making the contact or joint good and
tight, the structure may be considered as one of
which that compression stress and bending
moment at that point is transmitted up to 1/4
(1/2 at foot of column).
(Rivet and Bolt)
Article 68. Spacing of rivet or bolt shallbe greater
than 2.5 times its diameter center to center.
2 Riveting shall be done so that rivet shall filland
fit the hole perfectly tight.
3 No holes for bolts shall be made larger than0.5
mm.in diameter of bolt used.
(Arrangement of Bracings, Walls, etc.)
Article 69. Excluding the case where structures of
upright framings, floor system and roof trusses are
proved to be structurally safe through structural
calculation, steel shape or bar bracings, or rein-
forced concrete walls, roofslabor floor slabs shall
be arranged to suit.
(Prevention of Corrosion in Structural Materials)
Article 70. Steel shapes used in principal structural
"part shall be protected by non-corrosive
paints or shall be embedded in concrete or in
light protective concrete with no rust forming
quality for steel.
Section 6 Reinforced Concrete Construction
(Scope of Application)
Article 71. The provisions of this Section shall
apply to part of reinforced concrete in reinforced
concrete building, steel skeleton reinforced concrete
building constructed of reinforced concrete
combined with other construction such as mason"
ry, etc.
2 The provisions of Article 72, Article 75 and
Article 79 of this Section only shall apply to

uildings of height less than 4 meters and with
total floor area less than 30 sq.m., or to fence
with height not over 3 meters.
(Materials for Concrete)
Article 72. Materials to be used for concrete in
reinforced concrete buildings shall satisfy the
requirements in the following items :
(1) Sand, gravel, crushed stones and water shall
be free from acids, salts, organic matters or
particles of mud liable to cause rusting of steel
or injurious to obstruct normal process of setting
of concrete;
(2) Gravel or crushed stones shall be hard and
of size to go through easily between spaces in
reinforcing bars and space between reinforcing
bar and form.
(Joints and Fixing of Reinforcing Bars)
Article 73. Ends of reinforcing bars shall be hooked
to prevent from slipping.
2 Joint of main bar shall be at a partwhere
tension stress acts least excepting the case of
welding, the length of lap shall be more than 25
times its diameter (in the case of making joints
of main bars of different diameters, the smaller
diameter; hereinafter the same in this Article).
However, in case the joint may not be made at
a point where tension is not working at full
stress, then, the lap shall be more than 40 times
the diameter or bars.
3 Of the tension steel bars in beam framed with
column, excepting the case of welding with main
bars in column, the length of anchor shall benot
less than 40 times its diameter.
(Proportion of Concrete Mix)
Article 74. Concrete to be used in reinforced concrete
construction shall show compressive•E
strength of more than 90 kg/cm2 at age of 28
days.
2 Water-Cement ratio of concrete shall be kept
down from the value obtained by the following
formula according to the required strength for
structural purpose, except in cases where it is
determined by the testing of strength by Japanese
Industrial Standard A 1108 (Method of testing
compression stress) :
In case of
Cement
commonPortland
In case of high early strength
Portland Cement
In case of slag cement or
silica Cement
0.85 K
"F+0.64 IT
0.47 K
"F+0.05K
1.4K
"F+1.48K
In above formula, F, K and x shall showthe
following values respectively :
F=Compressive strength of concrete at age
of28 days given in table in Article 91.
K=Compressive strength of mortar at age of
28 days according to Japanese.
Industrial Standard R 5210 for Portland
Cement. However, in case the period of
2 weeks after concrete is poured happens
to fall on a month having average temperature
for that month less than 10°C, the
value of the stress to be decreased by 50
kg/cm2.
x-Water-Cement ratio
3 Mixture of Concrete shall be determined so that
the product shall be uniform, and compact.
(Curing of Concrete)
Article 75. Curing of concrete shall be done so as
to keep the temperature of concrete above 2°C,
while pouring and during the period of 5 days
after concrete is poured and care shall be taken
to prevent it from setting and hardening by dryout
or vibration.
(Removing of Supports of Forms)
Article 76. Supports for forms for beams and slabs
as principal structural part shall not be removed
before 6 weeks (4 weeks in case of roof floor or
in case of no floor bsing directly above).
2 The provisions of the preceding paragraph shall
not apply in case high early-strength Portland
cement is used or other cement is used and in
case } of the period of time or more mentioned
in said paragraph has elapsed and only in case
building official approves that he has no objection
thereto from standpoint of structural strength
due to favorable condition in respect to temperature,
humidity and others.
(Construction of Columns)
Article 77. Construction of columns as principal
structural part shall satisfy the structural requirements
as provided for in the following items :
(1) Main bars shall consist of more than 4 reinforcing
bars with properly spaced ties ;
(2) Spacing of ties shall be less than 30 cm.,
and at the same time not over 15 times the
diameter of smallest bars used ;
(3) Least diameter of column shall be more
than 1/15 of the distance between the main
supports unless it is checked as safe in consideration
of its slenderness ratio in structural
calculation.
(4) Sum of area of main bars shall be not less
than 0.8% of the area of cross-section of concrete
(if area of bar exceeds the area under
the provision of the preceding paragraph or
under the result of structural calculation, that
required area,,
(Construction of Beams)
Article 78. Beam as principal part for structural
strength shall be reinforced double, and shall
have stirrups at space not exceeding 3/4 of the
depth of a beam.
(Thickness of Protection for Embedded Bars)
Article 79. Thickness of concrete covering of the
-13-

embedded bars shall be more than 2 cm. for
walls not bearing wall, and slab, more than 3cm.
for bearing walls, columns or beams (more than
2 cm. for a part facing interior with effective
finishing for protection of steel bars such as
mortar, plaster, tiles or others) more than 4 cm.
for walls, columns, slabs or beams which come
in contact with earth directly, more than 6 cm.
for footing not including the levelling concrete.
Section 7 Plain Concrete Construction
(Provisions of Section 4 and Section 6 which applies
mutatis mutandis to Concrete Construction)
Article 80. Regarding the structural part of plain
concrete in plain concrete building or building
constructed of plain concrete construction combined
with other construction the provisions of
Section 4 (excluding Article 52), and Article 71
(except that part pertaining to Article 79), the
provisions of Article 72 and Article 74 to Article
76 inclusive in this Chapter shall apply mutatis
mutandis.
Section 8 Structural Calculation
Clause 1 General Provisions
(Application)
Article 81. Structural calculation of buildings
mentioned in the provisions of Article 20 paragraph
2 of the Law shall be conducted according
to the provisions of this Section excluding the
case under the provision of Section 9, excepting
the case where structural calculation is carried
out by the accurate method of structural calculation
recognized as equal or superior to that prescribed
in the provisions of this Section by the
Minister of Construction.
(Principle of Structural Calculation)
Article 82. Structural calculation under the preceding
Article shall comply with the requirements
of the following items:
(1) Calculate the stress developed in principal
part for structural strength of building caused
by loads and external forces specified by the
provisions of Clause 2;
(2) Permanent and temporary stresses at principal
part of structural strength mentioned in
the preceding item shall be calculated by combining
and summing up stresses by using the
following table ;
-f
(3) To check and ascertain that the stresses of
permanent and temporary stresses of preceding
item do not exceed the allowable stress for
permanent and temporary cases according to
the provisions of Clause 3;
(4) When necessary, to check and ascertain
whether the determination of the principal
structural part gives objectionable effect on the
-14-
use of building or not.
Clause 2 Loads and External Forces
(Kind of Load and External Force)
Article 83. Loads and external force acting on a
building shall be considered in accordance with
those mentioned in the following items:
(1) Dead load;

according to ttie actual condition of the building
concerned.
(Dead Loads)
Article 84. Dead load of esch part of building
shall be either values given in the following
table or values obtained by figuring out according
to the actual condition of the building concerned :
-15-

(Live Loads)
Article 85. Live load at each part of a building
shall be determined according to actual condition
of building concerned. However, live loads on
floor given in this balow may be taken from the
value as determined for each itsm concerned for
calculation :
auditorium, assembly hall
and seatings or assembly
room of similar use
300 270
160 Fixed seats
Do, other than fixed seats
360
330
210
6) Garage and passageway
for automobiles
550
400
200
7)
8)
Corridor, vestibule or
stairways
Open space on roof or
balcony
For room connected to those item (3) to item(5), the value of other
cases of item (4)is to be taken
Value of item(l) to be used. However, for buildings used as school
or department store, take the value in item(4)
16-

2 In the case of calculating compressive stress
due to vertical loads on column or footing, the
value of column (b) of the preceding paragraph
may be reduced depending upon the number of
floors it supports, down to the figure obtained by
multiplying the value of the following table, excepting
the floor-live loads for room mentioned in
5) of the table in the same paragraph:
3 If the live load for floor of commercial warehouse
calculated according to actual condition by
the provision of paragraph 1 is less than at kg.
400 per sq.m., shall be taken at 400 kg. persq.m.
(Snow Load)
Article 86. Snow loads shall be figured by multiplying
unit weight of snow with the deepest snow
fall of the locality.
2 Unit weight of snow in place as prescribed in
the preceding paragraph, for one sq.m., be more
than 3 kg. in heavy snow district and in other
snow district 2, kg. or more.
3 Maximum snow depth prescribed in paragraph 1
shall be determined according to group of district
under similar condition by referring to the past
snow fall records, and the heavy snow district
specified in the preceding paragraph shall be
determined based on the standard arranged by
the Minister of Construction in its regulation by
the administrative agency concerned.
4 Snow load on roof may, according to its slope,
take the value obtained by multiplying the following
value to the snow load in paragraph 1. However,
if slope is steeper than 60 deg., it may be
neglected. However, where there are strips to
prevent snow from sliding down from roof, it
shall be treated otherwise.
5 Snow load in heavy snow district prescribed in
paragraph 3 treated as semi-permanent load may
be reduced to 70% of the value obtained by calculating
according to the provisions of the preceding
four paragraphs and snow loads counted
to act together with wind pressure or seismic
force, it may be reduced to 35% thereof.
6 If there is possibility of snow piling on roof in
unbalanced way, its influence shall be considered
in structural calculation.
7 In locality where people are accustomed to removesnow
from roof from time to time, even in
case snow depth in that locality exceeds 1 m.,
snow depth may be reduced, according, to the
actual condition, to depth of 1 m. for calculation
of snow load.
(Wind Load)
Article 87. Wind pressure shall be calculated by
multiplying the coefficient of wind force to velocity
pressure.
2 Speed pressure of the preceding paragraph shall
be calculated by the following formula ; however,
the special administrative agency may designate
the district by the regulation and may, on the
-17-
basis of the standard set forth by Minister of
Construction in consideration of the wind condition
of that locality, determines the speed pressure
for that region within the sphere of 60% of
that value, (40% in the snow country mentioned
in the provision of paragraph 3 of the preceding
Article) :
q=60v/ h
where h=Height above ground level in meter
q=Speed pressure in kg. par sq. m.
3 The velocity pressure against a building built in
sea coast, river bank, up hill, over cliff, etc.
where it directly exposes to strong wind, shall be
taken at 300 kg. per 1 sq. m- or more.
4 Where another building or wind defence forest
or other similar facilities effective in protecting
the building in the direction of wind, the value of
velocity pressure in that direction may be reduced
to 1/2 of the value specified in the provision
of the preceding two paragraphs.
5 The value of coefficient of wind "force in paragraph
1 shall be as shown in the following diagrams
according to sectional form of building or
structure :

Form of plane
board
Type of structure |
in closed form
Type of structure
open form
in
; open
..
-3 -5 -i^
13
x>
t^i

Special administrative agency shall, on the basis
of the standard set forth by Minister of Construetion,
designate the district where ground is soft
and bad as prescribed in 3) of the table in the
preceding paragraph.
Coefficient of seismic force acting on independent
chimney away from building, or water tank and
chimney projected from roof shall be 0.3 or over.
However, for calculation of footing for independent
chimney away from building may be reduced
to0.2.
Whereas building or independent chimney away
from building, or water tank projected above roof
or the like, is supported by solid foundation, and
if proved that seismic force acting on the building
is comparatively small, it may, regarding the
building concerned, reduce the values of coefficient
of seismic force in 1) or 2) of the table in
paragraph 2 by 1/4 for each case on the basis of
the standard set forth by the Minister of Construction.
(Timber)
Clause 3
Allowable
Stress
Article 89. The values of allowable stress indirection
of grain of timber shall be according to the
following table :
Species of timber
Needle leaf
trees
Broad leaf
trees
Allowable
stress
Sugi, white fir, silver
fir, Todomatsu (kind
of fir), western red
cedar, hemlock-spruce
Swamp cypress,
Beihi
Hinoki,
black
red
pine,
pine,
Tsuga,
Oregon pine
Chestnut, Nara, beech
Keyaki (Japanese oak)
Oak
Allowable stress for permanent
stress kg. per sq. cm.
Allowable stress for temporary
stress kg. per sq. cm.
Compression]
[Tension
or bending
Shearing
2 times the allowable
stress for permanent
stress
v
|2 However, hard wood of special good grade to be
used as Shachi, pin, key, etc. its allowable stress
may double the value in above table in the preceding
paragraph respectively.
|3 In foundation water tank, bath room, and others
of the similar condition where it is always damp
Angle between direction of grain and applied
force
1) In case of less than 10 deg.
2) In case of above 10 deg. up to 70 deg.
3) In case of above 70 deg. up to 90 deg.
5 Allowable buckling stress of compression member
shall, according to its effective slenderness
ratio, be calculated by the following formula :
or wet, its allowable stress shall be 70% of that
of table in paragraph 1 respectively.
4 Allowable bearing stress of needle leaf timber
shall, depending upon the angle of direction of its
grain to the applied force, be in accordance with
the value given in the following table :
Allowable bearing stress
Same as compressive stress given in table of
paragraph 1
Value obtained by interpolation of the values of
1) and 3) as straight line
1/5 of allowable compressive stress given in the
table of paragraph 1 (Connection or joint of
sill and column or similar cases where no objectional
deformation by bearing liable to occur,
1/4)
when a^ IOO fK=fc (1-0.007)
when
\> 1QO
f K=
0.3fc
/X\2
\-=^\ \:,100/
-19-

fK stands for allowable buckling stress
kg/cm2
fc stands for allowable compressive
stress in direction of grain
x stands for effective slenderness ratio
(Steel Member)
Article 90. The value of allowable unit stress as
of steel and iron shall be in accordance with the
value given in the following table :
2 Allowable unit stress for buckling shall be calculated according to effective slenderness ratio :
(Concrete)
Article 91. The value of allowable stress par sq. cm. of concrete shall be in accordance with the value
given in the following table :
(Welding)
Article 92. Allowable unit stress of the weld through throat shall be in accordance with the value given
in the following table;
20-

ing the case of determining by loading test be
less than the value obtained by calculation under
the following formulas for different cases respectively:
-21-
(Soil and piles)
Article 93. Allowable bearing power of soil, excepting the case of determining by loading test, the
values in the following table shall be used :
2 Regarding kind of soil not shown in the table of
preceding paragraph shall be determined according
to the similar type of soil respectively.
3 Bearing power of foundation pole shall, except-
I
Method of driving of pile
By drop hammer
Single acting steam hammer
Double acting steam hammer
Allowable bearing power for
permanent load
w
p__0.18W(H-HQ
S-S' W+P
,, 0.225W(H-HQ
W+P
0^25 (F - F_') W
S-S' * W+P
Allowable bearing power for
temporary load
2 times the allowable bearing
power for permanent load
R=Bearing power of pile in ton
W=Weight of hammer in ton
p=Weight of pile in ton
H=Height, hammer dropped from in cm.
F=In case of double acting steam hammer, the energy of impact in ton-cm.
S=Amount of last penetration of pile in cm.
H'=Height of drop corresponding to least amount of penetration S' of pile, striking after S has
been measured, in cm.
F;=The energy of impact corresponding to least amount c£ penetration S; of pile in case of double
acting steam hammer, striking after S has been taken, in ton-cm.
S;=Penetration of pile in case of height of drop H' or hammering energy F' in cm.

-22-
Bection 9 Special Provisions for Structural
Calculation
(Application)
Article 94. Structural calculation of buildings
prescribed in Article 20 paragraph 2 of the Law
may be done according to the provisions of this
Section excepting the case under the provision of
the preceding Section.
(Principle of Structural Calculation)
Article 95. For making structural calculation for
building in accordance with the provisions of the
preceding Article, it shall be exercised to check
so that the stress at principal structural part
caused by loads mentioned in the provisions of
Article 98 and seismic force and other external
forces mentioned in Article 97 shall not exceed
respectively allowable unit stress prescribed in
the provisions of Article 98.
(Loads)
Article 96. Values of dead loads applied to various
parts of building shall be not less than those
given in the following table :
2 Values of live loads over floors of a building
shall not be less than the values obtained by
calculation according to the following table :

A
8 Specially heavy loads on floor, irrespective of
the values in above items, to be determined according
to actual condition.
4 Live load on floor of workshop and the like that
support operating machinery with accompanying
impact and vibration, etc. shall be increased by
more than 1/4 of the values of each item in the
table given in paragraph 2.
5 Live loads figured in accordance with the provisions
of the preceding three paragraphs may, according
to actual condition, reduce the load not
exceeding 1/10 for beams, 2/10 for girders, not
more than the proportion given in the following
table in consideration of number of stories supported
for compression stress on column or footing,
and the value corresponding to not more
than, 5/10 for seismic force, excepting for theater,
cinema, showhouse, place for viewing, auditorium,
assembly hall, seatings or assembly room of a
building available for other similar use, storage
room (warehouse), book storage room, and others
of similar class:
i&
6 Floors for garage, passageway for automobiles,
workshop and the like supporting heavy concentrated
load, its influence shall be taken into
consideration in calculation.
(Seismic Force)
Article 97. Coefficient of horizontal force of earthquake
taken shall be not less than 0.1. However,
special local administrative agency may, by
regulations, increase the coefficient of horizontal
force applied to kind and district determined in
respect to height of high building or chimney and
other structures, or buildings and structures built
on extremely un firm soil.
(Allowable Unit Stress)
Article 98. Allowable unit stress for structural
materials used in buildings shall be in accordance
with the values given in the following table.
However, the unit stress for rolled steel with
yielding point at 3500 kg/cm2 or more, or rivet
steel with tensile strength at 5000 kg/cm2 or
more may not be in accordance with this table:

3 Compression stress for concrete at age of 28
days given in the preceding paragraph shall not
exceed the value obtained by calculation under
following formula, provided that the stress of
concrete to be used is tested:
F=K(0.85X~0.64)
where F stands for compressive unit strength of
concrete in kg/cm2 at age of 28 days
K stands for unit compressive strength in
kg/cm2 of mortar test piece at age of
28 days by JES-R 5210 (portland cement)
X stands for cement water ratio by weight
4 The ratio of Young's modulus for steel to Young's
modulus for concrete shall be taken at 15 for
calculating stresses of reinforced concrete construction.
5 Bearing power of pile drivenby use of a drop
hammer shall not exceed the value obtained by
the following formula :
P=WH/(5D+0.1)
where P=bsaring power in ton
W=weight of hammer in ton
H=height that hammer drops in meter
D=penetration in meter by last blow of
hammer
(Methods of Estimating Spans for Beams for
Calculation of Reinforced Concrete Construction)
Article 99. Span for beams or slab in reinforced
concrete construction shall be measured from
center to center of its supports. However, the
span may be replaced by the distance between
the inside face of supports plus the depth of
beam or the thickness of slab.
2 Span for beam or slab with haunches at its ends
may be taken at distance between the points in
the haunches equal to 0.5 of the depth of beam
or the thickness of slab measured up from the
bottom of haunches.
(Reinforced Concrete T-beam)
Article 100. In case beams and slabs are built as
monolithic, the construction may be considered as
T-beam. In this case, calculation shall be made,
taking the width of its flange less than 1/4 of its
span and at the same time not more than 12
times the thickness of the beam or slab.
(Loads on Reinforced Concrete Slab in Roof and
Floors)
Article 101. In reinforced concrete construction
where reinforcement bars in rectangular
-24
beam or slab supported on all its four sides run
on bothways, the share of distributed load by
both spans may be estimated within the limit
not less than the values obtained by calculation
under the following formulas :
W&=l4W/(l4+b4)
W;=b4W/(l4+ b4)
where W=Load to be distributed per unit area
1 =Span in one direction
b =Span perpendicular to direction of 1
Wj=Distributed load to be shared by slab
with span 1
W&=Distributed load to be shared by slab
with span b
(Sectional Area of Materials for Compression
Member)
Article 102. Load on compression members shall
not exceed the values obtained by calculation
under the following formulas according to composed
members and their sections :
For steel members : P=Afc(l-Cl/r)
For timber : P==Afc(l-0.021/d)
For reinforced concrete : P=fc(Ac+15As)
where P=Load
A=Sectional area
fc=Allowable compression unit stress in
provision of Article 98
l=Distance between principal supports
d=Least diameter of section
r=Least radius of gyration; however, in
steel column restrained in the direction
of deflection by structural condition,
r for corresponding axis in the
direction of deflection may be chosen
C=0.003 for steel member (0.004 when
both ends are hinged), 0.005 for cast
iron
Ac=Effective area of concrete included
within the circumferential line outside
of its main reinforcement bars
A5=Total sectional area of main bars
2 When compression member of reinforced concrete
construction has proper spiral hoopings,
the compression unit stress for concrete mentioned
in paragraph 1 may be increased by not
exceeding 2/10 of its stress, provided that the
pitch of hooping spiral is less than 8 cm.
3 When the distance center to center of principal
supports of compression member of reinforced

concrete construction for structural strength
exceeds 15 times the least diameter of the
member, it shall not be calculated by the
formula in paragraph 1.
(Section of Member for Bending)
Article 103. Bending moment in number for bending
shall not exceed the value obtained by calculation
under the following formula :
M=f&S
where M-Bending moment#
f& =Allowable bending stress in the provision
of Article 98
S =Section modulus
(Section with Compression and Bending acted in
Combination at the Same Time)
Article 104. Combined unit stress resulting from
compression stress and bending moment occurring
at same time shall be calculated under the following
formula :
fc = (M/S) + (P/A) (l/(l-Cl/r))
where fc =Combined unit compressive stress
M=Bending moment
S =Section modulus
P =Compression force
A =Section area
1 =Distance between principal supports
r =Radius of gyration about neutral axis
of section due to bending moment.
However, the lumber the diameter of
section in bending moment, perpendicular
to neutral axis
C =0.003 for steel (0.004 in case its support
is hinged), for cast iron 0.005,
for lumber 0.02
2 Combined stress for preceding paragraph shall
not exceed the allowable unit stress as prescribed
in the provision of Article 98.
(Rectangular or T-beam Section)
Article 105. Bending moment in reinforced concrete
rectangular beam with single reinforcement,
or single reinforced T-beam with its
neutral axis located within the slab shall not
exceed the values obtained by calculation under
the following formulas :
M=ni(3 - m) fcbd2/6
M=(3-m) ffbd2/3m
where M=Bending moment
ni=Neutral axis ratio
fc =Allowable unit compressive stress in
concrete in the provision of Article 98
ft =2Allowable unit tensile stress of steel
bar in the provision of Article 98
m=Percentage of steel to concrete in
sectional area
b =Width of beam
d =Depth of beam
2 Ratio of neutral axis in the provisions of preceding
paragraph shall be calculated under the
-25-
following formula :
15
ni= (Vl+2m/15-l)
where ni=Ratio of neutral axis
m=Percentage of steel to concrete in
sectional area
(Reinforced Concrete Construction Member with
Shearing Stress)
Article 106. In section with main reinforcement
bars crossing, of reinforced concrete column,
beam or roof slab or floor slab, unit stress in
shearing figured by the following formula shall
not exceed 1/2 of compressive strength of
concrete at age of 28 days, and at the same
time, it shall be less than 18 kg. per sq. cm.:
f, = S/bj
where fs=Unit shearing for concrete
S=Shearing force
b=Width of beam or slab; however, for
T-beam the width of stem
j =Distance from center of compressive
stress to center of tensile stress
2 In case unit stress in shearing mentioned in
the preceding paragraph exceeds the allowable
unit shearing given in the provision of Article 98
paragraph 2, stirrups or hoopings shall be placed
in that part in accordance with the provisions of
the following items. However, where main bars
are bent up, that part may be considered as
provided with sMrrups or hoops :
(1) Stirrups and hoopings shall be arranged
properly to take care of shearing stress distribution,
and the spacing shall be less than 2/3
of depth of column, beam or roof slab or floor
slab;
(2) Stirrups shall go around outside of tension
bars and shall be carried into near the edge of
compression side and also, they shall be
anchored appropriately.
CHAPTER IV Fireproof Construction, Fireresisting
Construction, Firezone,
etc.
(Fireproof Construction)
Article 107. By fireproof constructions prescribed
in the provisions Article 2 item (7) of the law
means as described by the following terms, excluding
those that the grounds for finishing or
covering part of steel skeleton with metal lath
concrete, metal lath mortar, concrete mortar or
plaster given in (c) of items (1) to (4) inclusive
are those columns and beams given in item (2)
(a) or (b) with least diameter or width less than
25 cm. However, covering or thickness mentioned
in item (1) (c) or item (2) (c) includes
respectively the thickness of finish such as
mortar plaster and the like.
(1) Pertaining to walls that come under one of
the following items :

(a) Reinforced concrete construction or steel
frame reinforced concrete construction ;
(b) In steel frame concrete construction, the
thickness of concrete protective covering being
3 cm. or more;
(c) Steel frame construction with steel
skeletons both sides of witch are covered
with protective coat of reinforced concrete
or mortar or metal lath of thickness 3 cm.
or over or covered with bricks, stones or
concrete blocks ;
(d) In brick, stone or concrete block constructions
reinforced by steel members, the
thickness of brick, stone or concrete protective
finish or covering being 4 cm. or more.
(2) Pertaining to columns that come under one
of the following items:
(a) Reinforced concrete construction or steel
reinforced concrete construction ;
(b) In steel frame concrete construction, the
thickness of protective covering of concrete
being 5 cm. ormore;
(c) Steel skeleton protected by bricks, stones
or concrete blocks of thickness not less than
7cm.;
(d) Plain concrete, brick, stone or concrete
block construction ;
(e) In brick, stone or concrete block construction
reinforced by steel members, the
thickness of brick, stone or concrete block
protective finish or covering being 7 cm. or
more.
(3) Pertaining to floors that come under one of
the following items :
(a) Reinforced concrete construction, or steel
frame reinforced concrete construction ;
(b) Plain concrete, brick, stone or concrete
block construction of thickness being 3 cm.
or more;
(c) In brick, stone or concrete block construction
of thickness 3 cm. or more reinforced
by steel members, the thickness of
brick, stone, or concrete block finish or
covering being 4 cm. or more, or those steel
materials being covered by mortar on metal
lath or plaster of thickness 3 cm. or more.
(4) Pertaining to beams that come under one
of the following items :
(a) Reinforced concrete construction or steel
frame reinforced concrete construction ;
(b) In steel frame concrete construction the
covering of concrete for steel skeleton being
5 cm. or more;
(c) Steel truss without ceiling directly below
or, in case there is ceiling directly, below,
that ceiling is to be built of mortar on metaj
lath not less than 2cm., or plaster, or wired
(5) Pertaining to roofs that come under the
following items :
(a) Reinforced concrete construction or steel
frame-reinforced concrete construction ;
(b) Plain concrete, brick, stone or concrete
block construction ;
(c) Brick, or concrete block construction reinforced
with steel members;
(d) Metal lath concrete or mortar on metal
lath with the thickness of covering 3 cm. or
more or covered with wired glass.
(6) Pertaining to stairs that come under one of
the following items :
(a) Reinforced concrete construction or steel
frame reinforced concrete construction ;
(b) Plain concrete, brick, stone^or concrete
block construction ;
(c) Brick, stone or concrete block construction
reinforced with steel members ;
(d) Steel construction.
(7) In addition to those given in the preceding
items, that designated by the Minister of Construction
upon hearing the opinion of Director
of National Fire Defence Agency as having
fireproof quality equal to or better than above
mentioned.
2 In beams and columns in 2 topmost floors of a
building or in a building less than 4 stories
where steel frame construction is used, if the
steel skeleton has non-combustible ground, and
finished with protective covering of concrete or
mortar on metal lath of thickness 5 cm. or more
shall be treated as fireproof construction.
(Fire-resisting Construction)
Article 108. Meaning of fire-resisting construction
mentioned in the provisions of Article 2 item (8)
of the Law shall be as described in either one of
the following items :
(1) Mortar finish on metal lath or plaster finish
on wood lath of thickness 2 cm. or more;
(2) Mortar or plaster finish over wood-fibrecement
sheet of total thickness 2.5 cm. or
more;
(3) Cement mortar coating with tile finish of
total thickness 2.5 cm. or more;
(4) Cement mortar finish over cement sheet,
magnesia-cement sheet or common tiles of
total thickness 2.5 cm. or more;
(5) Dozo construction (Japanese earth-vault construction)
;
(6) Earth-plaster wall (shinkabe) construction
with back coating ;
(7) In addition to those mentioned in above
items, that designated by the Minister of Construction
upon hearing the opinion of Director
of National Fire Defence Agency as having
fire-resisting quality equal to or better than
above mentioned.
26

4
2 Exterior walls in one story building with framing
constructed of non-combustible materials
surface of which is applied with wood-fibercement
sheet of thickness 1.5 cm. or more, or
fire-protecting timber of thickness 0.9 cm. or
more to receive the finishing of sheet metal shall
be treated as fire-resisting construction.
(Fire-door and Other Fire Protective Facilities)
Article 109. By fire-door and other fire protective
facilities mentioned in the provisions of Article
64 of the Law shall mean any one of the items
as described below :
(1) Fire door A;
(2) Fire door B;
(3) Drencher installed in opening which has
passed the inspection to be conducted by the
National Fire Defence Agency.
2 Fireproof- or fire-resisting exterior wall, wing wall
and other similar construction that built cutting
across an opening in a building or buildings and
all parts of boundary line, center line of road
and center line of exterior wall of each building
constituting more than 2 houses within the same lot
(building with total floor area less than 500 sq. m.
considered as one house) located or separated at
the distance 3 m. or less from the opening concerned
in case of one story and 5 m., or less in
2nd floor or above to the above mentioned center
lines, shall be considered as the fire-facilities
mentioned in the preceding paragraph.
3 In ventilation opening of area 100 sq. cm. or
less, the fire-resisting protection made of iron
plate, mortar slab and other similar materials
(including vent located in part 1 m. less from
ground level protected by metal wire net of
2 mm. mesh.) shall be considered as the firefacilities
mentioned in paragraph 1.
(Construction of Fire-door)
Article 110. Fire door A mentioned in the preceding
Article paragraph 1 item (1) shall mean one
of the constructions describad in one.of the
following items :
(1) Frame shall be steel with steel plate of
thickness 0.5 mm. or more applied on all faces;
(2) Made of steel, with steel plate of thickness
1.5 mm.or more;
(3) Made of steel frame concrete or of reinforced
concrete of thickness 3.5 cm. or more;
(4) Door of dozo-construction *of thickness 15
cm. or more;
(5) That specified as having equal or superior
fire-resisting quality by the Minister of Construction
upon hearing the opinion of the
Director of National Fire Defence Agency in
addition to those given in the foregoing items.
2 Fire-door B mentioned in the preceding Article
paragraph 1 item (2) shall satisfy one of the
following requirements in its construction :
(1) Made of steel plate of thickness less than
-27-
1.5 mm.;
(2) Made of steel frame concrete or reinforced
concrete of thickness less than 3.5cm. ;
(3) Door of dozo-construction of thickness less
than 15 cm.;
(4) Steel construction with wired glass inserted;
(5) Fire-protecting timber frame with galvanized
sheet iron applied on all faces;
(6) Fire-protecting timber frame with interior
faces applied with fire-protecting timber board
of thickness 0.9 cm. or more, and its exterior
face protected by application of galvanized
iron sheet ;
(7) That recognized as having equal or superior
fire-resisting quality by the Minister of Construction
upon hearing the opinion of the
Director of National Fire Defence Agency and,
in addition to those given in the foregoing
items.
3 Door for opening of 500sq.cm. or less in area
made of fire-protecting timber frame insertion of
wired-glass shall be considered as fire-door B in
the preceding paragraph.
4 The part of fire door coming in contact with
frame or other fire door shall be of tongue and
groove fit, or of, "jogibuchi" or door stop, so it
shall be intact in place in case of fire, and shall
be so installed that the hardware building fire
door will not show where closed.
5 Fire door mentioned in paragraph 1 item (1) or
item (2), or paragraph 2 item (1) or item (4)
shall be installed in opening where surrounding
of opening (in case fixture is to be installed
within 15cm. inside of fire door, that fixture
shall be included) is constructed of non-combustible
materials or fire-protecting timber.
(Principal Important Materials for Fire Prevention)
Article 111. Cement,metal lath, wire lath, wood-firecement
sheet, fire-protecting timber, fire-protecting
point, or other principal fire-resisting materials
similar to them to be used in structural parts in
addition to the principal parts of construction on
the structural parts of fire-proof construction and
fire-resisting construction or fire doors.
(Fire-preventing Section)
Article 112. Building that its principal part of
construction is constructed of fireproof or noncombustible
materials, and its floor area exceeding
1500 sq. m. there shall be provided with fire
fighting section at convenient part so that total
floor area of part included in that section shall
not exceed 1500 sq. m., and constituting either
floor or wall of fireproof construction, or with
fire door A. However, in the case of a part of
building provided with sprinkler or in the indispensable
case due to its use, such as seating
room, theater, cinema, show house, place of review,
auditorium or assembly hall, indoor sport

oom, factory or others of the similar cases shall
be expected.
2 In case apart of building coming under one of the
items of Article 24 paragraph 1 of the Law that
part and other parts shall be separated by wall
made of fireproof construction or by wall with
both faces made as fire-resisting construction, or
provided with fire door A or fire door B (excluding
the type mentioned in Article 110 paragraph
2 item (3) and item (6). >
3 In case a part of building coming under one of
the items of Article 27 of the Law that part and
other parts shall be separated by floor or wall
made of fireproof construction and fire door A.
(Fire Wall in Wooden Buildings, etc.)
Article 113. Fire wall shall be constructed as required
by the following items :
(1) Self supporting structure of fireproof construction
;
(2) In wooden building, neither concrete construction
nor masonry construction shall be
allowed ;
(3) Both ends and top of fire wall shall project
out from exterior walls and roof not less than
50cm. (in case exterior wall of a building
located on both sides of fire wall and underneath
of eave or ground for roof for distance
of 1.8 m. or less are of fire-resisting construction,
and at the same time there is no opening
in the parts mentioned herein, that projecting
part may be 10cm.). However, in case fireproof
exterior wall or roof is of fire-resisting
construction located at section of width 3.6 m.
or more including fire wall, and at the same
time there is no opening or the opening in that
part is provided with fire door or sash window
made of fire protecting timber with insertion
of wired-glass is installed, that part shall be
excepted ;
(4) Opening in fire wall shall be less than 2.5
m.sq. and it shall be provided with fire door A;
(5) Space between fire wall and passing water
pipe, electric wire conduct and other pipes shall
be filled with mortar,
(Principal Partition Wall, etc. for Building)
Article 114. Partition wall between each unit of
multifamily tenant housing or apartment house
shall be built as fireproof or fire-resisting construction,
and it shall be carried up to roof truss
or ceiling space.
2 Principal partitionwall in the part of a building
used as school, hospital, medical office, (excluding
those having no facilities for accommodation
of patients), hotel, Japanese hotel, lodging house,
dormitory or market as concerned in the matter,
shall be built as fireproof or fire resisting con-
-28-
struction, and shall be carried up to roof truss or
ceiling space.
B When roof trusses of a building exceeding 300
sq.m. in its building area are constructed of
wood, a partition wall with its both sides built
of fire-resisting construction shall be provided in
roof truss space at points not exceeding 12 m.
measured along the side wall girder.
4 Passageway connecting two buildings of total
floor area exceeding 200 sq. m., and of length 4m.
or more with wooden trusses shall be provided
with partition in roof truss space built of fireproof
construction or fire-resisting construction
on both faces.
(Chimney built within Building)
Article 115. Chimney built within building shall
satisfy the structural requirements as described
in the following items :
(1) Vertical distance of projection of chimney
built within a building to the face of roof shall
not be less than 60cm.; however, in case of
brick, stone or concrete block construction built
without reinforcing steel members, the part
projected up shall be not less than 90 cm;
(2) In case there is a building at horizontal
distance less than 1 meter from the top of a
chimney, the chimney shall be carried up 60cm.
or more above the eave of a building concerned;
(3) Part of chimney built of metal or asbestos,
going through roof truss space, ceiling space,
floor space, etc., shall be covered with incombustible
materials other than metal ;
(4) Metal or asbestos chimney shall be built at
least 15 cm. away from wooden or other combustible
material, excepting that part covered
with incombustible materials other than metals
of thickness 10 cm. or more;
(5) Part of chimney of fireplace built in with
wall in a building that is in interior of house
shall be constructed of reinforced concrete of
thickness 15cm. or more, or plain concrete
brick, stone or concrete block construction of
thickness 25cm. or more, and in brick, stone
or concrete block chimney shall be lined with
earthenware pipes or with finish of cement
mortar ;
(6) In the case of fireplace built in with wall
where bend is less than 120°, there shall be an
opening at the bend ifor cleaning.
(Quantity of Dangerous Materials)
Article 116. Quantity of dangerous materials mentioned
in Article 27 item (6) of the Law is as
listed below :

29-

2 In case of temporary uses for engineering works
and other enterprises, the limit of the quantity
of dangerous materials permitted to.b#e stored
for the purpose of carrying out the work, andthe
limit of quantity of compressed gas or liquified
gas of combustion-resisting or incombustible
quality shall be unrestricted.
3 In case more than two kinds of the dangerous
materials given in the table of paragraph 1 are
to be stored in the one building, the limit of the
dangerous materials prescribed by paragraph 1
shall be obtained by dividing the volume of
quantity of dangerous material intended to be
stored by the built of the value of the quantity
of dangerous material in the column concerned,
and the case the value of sum respective quotients
istobe 1.
30-
CHAPTER V Facilities for Escape
Section 1 Corridor, Escape Stairways and
Exits
(Scope of Application)
Article 117. The provisions of this Section shall
apply to special buildings mentioned in Article 35
of the Law or to a building with total floor area
of living rooms exceeding 1,000 sq. m. However,
as to part partitioned fire-proof walls without any
opening for living room with total area less than
1,000 sq.m. which shall not be used as special
building enumerated in said Article, they shall
not apply.
(Door in Exits to Audierxa Hall)
Article 118. Doors installed in exits of audience
hall of theatre, cinema, show house, place for
viewing, or auditorium or assembly hall shall not
be installed to open in.
(Width of Corridor or Passageways)
Article 119. Width of corridor or passageways
shall be wider than the figures given in the
following table :

(Distance by Walk to Stairways)
Article 120. In floors other than escape-floor (floor
with exits directly leading to ground, hereinafter
, the same) of a building, a distance by walk from
each part of living room to one of through stair
ways leading directly to escape floor (including
ramp; hereinafter the same) shall not exceed
the values given in the following table :
>s^
V
(Providing Through Stairways and its Structure)
Article 121. In case floors other than escape-floor
of a building come under one of the following
items, more than two through stairways beading
from that story to escape-floor shall be provided.
However, of those mentioned in from item (2) to
item(4) inclusive, if its principal structural parts
are constructed as fire-proof structure or constructed
of incombustible materials, the provision
of item 5 shall govern:
(1) Use for theater, cinema, show house, place
of viewing, auditorium, or department store or
meeting place ;
(2) Of floors for use as hospital or medical office,
the floor in which the total floor area for
patients use exceeds more than 50 sq.m.;
(3) Of floors for use as hotel, Japanese hotel or
lodging house, the floor in which the total floor
area of bed room for guest is 100sq.m.; or of
floors for use as apartment houss, the floor in
which the total floor area of living room exceed
100sq.m.; or of floors for use as dormitory,
the floor in which the total floor area for sleeping
rooms exceeds 100 sq.rn. or more;
(4) Of floors other than those mentioned in
preceding two items, floor in which the total
31
floor area of living rooms directly above or
directly below escape-floor exceeds 200 sq. m.
and of other floors, the floor in which total area
floor exceed 100 sq. ;
(5) Of floors of a building with its principal
structural parts built as fireproof construction
or with incombustible materials, the floor in
which the total floor area of living rooms
exceeds 400 sq. m.
2 In case a building is divided into sections by
means of fireproof partitions without any opening
the provisions of preceding paragraphs shall apply
to the respective sections.
3 Through stairways under the provisions of paragraph
1 that are provided outside, shall not be of
wooden construction.
(Providing Escape Stairways)
Article 122. Through stairways leading to 5th floor
or above in a building of 5 floors or more above
ground level shall be escape stairways or special
escape stairways in accordance with the provision
of Article 123.
2 In a building for use asdepartment store coming
under the provisions of Article 27 item (4) of the
Law, two or more through stairways shall ba
provided leading to and from sales rooms of each

floor and open space in roof and they snail become
escape-stairways or special escape stairways
prescribed in Article 123.
3 One of through stairways mentioned in the
preceding paragraph that lead to or from sales
room of 5th floor and above shall be special
escape stairs prescribed in Article 123 paragraph
3.
4 In a part of a building above 5th floor used as
department store with total floor area exceeding
3,000sq.m. special escape stairs prescribed in
Article 123 paragraph 3 one for every 3,000sq.m.
of floor area shall be provided which will not
serv6 for 4th floor and floors below 4th.
(Structure of Escape and Special Escape Stairways)
Article 123. Escape stairways to be installed inside
a building shall be built in accordance with
the construction described in the following items.
However, for top floor, the provisions of item(l),
item (3) or item (4) may not apply:
(1) Stair-case shall be surrounded with fireproof
walls excepting the part in direct contact with
outside air part of the windows of item (3) or
the exits of item (4) ;
(2) Windows and other effective opening for
taking in light or the illumination equipment
with supplementary electric supply shall be
* provided in staircase;
(3) In case windows are to be provided inwalls
of staircase facing inside house, area of each
windows shall be less than 1 sq. m., and fixed
steel sash window with wired glass shall be
installed therein ;
(4) Exits to stairways from inside of house shall
be provided with automatic closing fire door A
or steel door with wired glass which may be
opened in case of necessity;
(5) Door or its auxiliary exit door mentioned in
the preceding item shall be installed to open
toward direction of escaping;
(6) Stairways shall be of fireproof construction,
and it shall lead directly to escape-floor.
2 Escape stairways to be provided outside of a
house shall be constructed as required by the
following items; however, as for top, provisions
of item (1) or item (2) may not apply:
(1) Stairways shall be provided at distance 2 m.
or more away from the opening (excluding an
opening 1 sq.m. or less in area with fixed steel
sash window with wired glass in) other than
the exit leading to those stairways from inside
of house;
(2) Exits for stairways connecting to or from
inside of house shall be provided with automatic
fire-door A or steel sash door with wired glass
which may be operated at any time;
(3) Door or auxiliary exit door in it mentioned
in the preceding item shall be installed to open
-32
to direction of escaping ;
(4) Stairways shall be of fireproof construction
which shall lead directly to ground level.
3 Special escape stairways shall be constructed in
accordance with the requirements of the following
items; however, as for top, provisions of item
(1) item (2), item (4) or item (5) may not
apply:
(1) Either balcony or attached room with
window open to outside air shall be provided,
between inside of the house and stair-casa;
(2) Excluding part of opening directly in contact
with outside air or part of window of item (5),
part in exits of item (7) or item (8), stair-case
and attached room shall be surrounded by fireproof
wall ;
(3) Stair-case shall be provided with window
facing attached room and other effective opening
for taking in light or shall be installed illuminating
equipment with extra source of
electricity ;
(4) Stair-case shall not be provided with opening
*facing inside house except at parts facing
balcony and attached room ;
(5) In case window is provided in apart facing
balcony or attached room of stair-case, sash
window shall be fixed;
(6) In balcony and attached room, no opening
except exit in walls facing inside of the houss
outside of stair-case shall be provided;
(7) Exit leading from inside house to balcony
or attached room shall be installed with automatic
fire door A tjaat may be operated at any
time;
(8) Exit leading from balcony or attached room
to staircase shall be provided with automatic
door that may be operated at any time;
(9) Door or its auxiliary door mentioned inthe
preceding two items shall be so installed as to
open to direction of escaping;
(10) Stairways shall be constructed as fireproof
and shall lead directly to escape floor.
(Width of Escape Stairways, etc. in Department
Store)
Article 124. With respect to the escape stairs,
special escape stairs and width of exits leading
to these in a building used as department store,
the requirements of the following items shall be
observed :
(1) Total of the widths of escape stairways and
special escape stairways in each floor shall be
not less than the values obtained by calculating
by the following proportion in floors above
ground level 6cm. per 100sq. m. of total floor
area (part of floor used for department store,
hereinafter the same in this Article and Article
125) of each floor directly above that floor from
which one is to take refuge by means of that
escape stairways and special escape stairways

and at the same time more than 30cm. per
100 sq. m. of floor area of that floor;
(2) Total of widths of exits leading to or from
escape stairs and special escape stairs in each
floor shall be more than the values obtained by
calculating by the following proportions per 100
sq.m. of that floor in each floor: more than
27 cm. in floors above ground level, more than
36 cm. in ground floor.
2 Regarding calculation of the required widths
mentioned in the provisions of the preceding
items, escape stairs and special escape stairways
chiefly leading to escape-floor from one floor or
two floors above ground level may be considered
as those having the width of 1.5 times.
3 In applying the provisions of tha preceding two
paragraphs, open space in roof shall be considered
same as other floors.
(Exits to Outside of Building)
Article 125. In escape-floor the walking distance
leading from stairways to one of the exits to
outside of a building shall be less than the value
given in the provisions of Article 120.
2 Doors in exits leading to outside of a building
for use of audiences in theater, cinema, showhouse,
place of viewing, or auditorium, or meeting
place shall not be installed to open in.
3 Total of widths of exits in escape-floor of department
store leading to outside shall be more than
the values obtained by calculation under the
following proportion; 6 cm. per 100 sq. m. or
total floor area of each floor, and at the same
time more than 40cm. per 100 sq.m. in floor
area of largest floor.
4 The provisions of paragraph 3 of the preceding
Article shall apply to the preceding paragraph
mutatis
mutandis.
(Open Space in Roof)
Article 126. Open space in roof shall be surrounded
by parapet wall or wire fence of height 1.1 meters
or more necessary for safety.
2 In case the floors above 5th floor of a building
are to be used as sales rooms of department
store, an open space in roof available for refuge
shall be provided.
Section 2 Passages within Building Site
Necessary for Escape and Defence
against Fire
(Scope of Application)
Article 127. The provisions of this section shall
aor-ly to the buildings mentioned in Article 35 of
the Law.
(Passageways within Building Site)
Article 128. Building site shall be provided with
passageways 1.5m. or more in width leading from
outside escape stairways mentioned in Article 123
paragraph 2, and with exits mentioned in Article
-33-
125 paragraph 1 to road, park, open space and
other large vacant spaces.
(Passageway in Site for large Scale Wooden
Building) *-
Article 129. If-a building with whole of its principal
structural parts is constructed of wood and
exceeding 1,000sq.m. in total floor* area or a
part of principal structural part is wood construction
when its total floor area (excluding
floor area of the part, for which principal structural
parts are fireproof and separated from other
parts by means of fireproof walls and fire doors
A if any; hereinafter the same in this Article)
exceed 1,000 sq. m., it shall be surrounded by
passage 3 m. wide or more (except the part
bounded by a road). However, in- case the total
floor area is less than 3,000 sq. m., the width of
passageway along the boundary line of adjacent
lot may be 1.5m. or more.
2 In case there is a building composed of more
than 2 houses or more in the same building site
(excluding a building with its principal structural
parts are either built or are of fireproof construction
or with incombustible materials, and those
with floor area exceeding 1,000 sq.m.), if its
sum of total floor area exceeds 1,000 sq. m., the
part constituting the total of total floor area over
in 1,000 sq.m. shall be divided into section of
building with total floor area kept within 1,000
sq. m. and shall be surrounded by passageways 3
m.or more in width (excluding parts bounded by
road or boundary lines of adjacent lots.)
B The exterior wall (if there are eaves, including
underneath thereof) of fireproof construction and
having fire floor at an opening liable to fire
spread, if it is cut away effectively against fire
door by means of buildings with total floor area
kept within 1,000 sq. m. the provision of the
preceding paragraph shall not apply to these
buildings. However, in case the total of total
floor of the building exceeds 3,000sq. m., the part
constituting the total of that total floor area not
exceeding 3,000 sq. m. shall be surrounded by
passage (excluding the parts bounded by roads or
boundary lines of adjacent lots) 3m. or more in
width.
4 Irrespective of the provisions of the preceding
items, passageway may go through the corridor
coming under the provisions of the following
items. However, the passageway out through
the corridor shall be more than 2.5m. in width
and height :
(1) Width not over 3 meters;
(2) Not to be used except for passage or light
transport.
5 Passageways mentioned in each preceding paragraph
shall lead and reach to the roads on which
abuts the building site,

CHAPTER VI Use Zone
(Moderation of Restrictions for Existing Buildings)
Article 130. Permissible scope of enlargement, remodelling
or change of usa of existing buildings
not complying with provisions of Article 49 of the
Law or Article 50 paragraph 2 or paragraph 4 of
the Law shall be as provided for in. the following
items with the standard at the time when the
building concerned has come not to comply with
these provisions (hereinafter referred to as
"standardized time" in this Article) :
(1) The enlargement or remodelling is to be
done in the site at standardized time, and the
area or total area of building for enlargement
or remodelling is not to exceed the percentage
against area of site at standardized time prescribed
in the provisions respectively in Article
55 of the Law or Article 56 of the Law;
(2) After standardized time total floor area to
be increased by extension (in case extension
involves more than two houses or enlargement
undergoes by several extension works, total of
floor areas increased by these enlargement works)
shall not exceed 1/2 of total floor at standardized
time (in case there is a building constituting
more than two houses in the same site, tota1
floor area thereof) ;
(3) Total floor area of part of a building (total
of floor areas increased by these enlargement
of change of use when several extensions or
change of use take place) not appropriate for
uses mentioned in the provisions of Article 49
of the Law or Article 50 paragraph 2 or paragraph
4 of the Law concerned with the increase
through enlargement or change of use after
standardized time shall not exceed 1/2 of the
total of that floor area at standardized time;
(4) In the case where the cause not complying
with the provisions of Article 49 of the Law is
due to horse power of motors or number of
machineries, the total of horse power of motors
or number of machineries increased by enlargement
of building or change thereof after standardized
time (in case enlargements take place
at several occasions, the total of these enlargements)
shall not exceed 1/2 of total of horse
power or number of machineries at standardized
time.
CHAPTER VII Height of Building
(Disposal about Moderation in Height)
Article 131. Disposal about moderation of application
of the provisions of Article 58 paragraph 1
or paragraph 2 of the Law under the provisions
of paragraph 3 of the same Article shall be as
prescribed in this Chapter.
2 In the case of area where land replotting has
been executed as well as other areas where
street blocks have been readjusted In like manner,
the road on which abut the street blocks, subject
to the designation of administrative agency concerned
shall be treated as the front road.
(In case of having more than two Front Roads)
Article 132. In case more than two front roads to
a building exist, regarding the area with horizontal
distance from the boundary line of front road
which is largest within the limit of twice the
width of that road, or at the same time with the
-distance within the limit of 35 and regarding the
area with the horizontal distances from center
line of other front roads exceeding 10m., the
width of all front roads shall be treated as having
the same width as the widest front road.
2 With regard, out of the areas other than that
mentioned in the preceding paragraph, to the
area with horizontal distance from the boundary
line of one front road within the limit of twice
the width of that road and at the same time
with the distance within the limit of 35m., the
front road thereof only may be considered as the
front road.
3 With regard, out of the areas other than that
mentioned in paragraph 1, to the area with
horizontal distance from the boundary line of
more than two roads within the limit of twice
the widthof each road and at the same time
with the distance within the limit of 35m., the
narrowest road of the front roads thereof shall
be considered as having the same width of the
wider road.
(When Site abuts on Park, Open Space, Body of
Water, etc.)
Article 133. In case a site of a building abuts on
park, open space, body of water, or others of the
similar nature, the height of each and all part of
said building may be taken 1.5 times or less
(1.25 times in residential zone) of the horizontal
distance measured from the boundary line of the
opposite side of the front road, and at the same
time, it shall not exceed twice the width of front
road (1.75 times in residential zone) increased
by 8m., and it shall not exceed the width of said
park, open space, body of water, or others of the
same or similar nature.
(In case Park, Open Space, Body of Water or the
Like exists on the Opposite Side of Front Road)
Article 134. In case park, open space, body of
water or the like exists on the opposite side of
front road, the height at any and all parts of said
building shall be less than 1.5 times of the
horizontal distance from that part or parts of
building to the boundary line on opposite side of
said park, open space, body of water or the like
(1.25 times in residential zone), and at the same
time, it does not exceed twice the width of front
road (1.75 times in residential zone) plus 8 m.
OA
^^O*±
*"""•E

(In Cass there is Wall-surface Line Designated in
Opposite Site of Front Road)
Article 135. In case there is wall-surface line
receded front road boundary line is opposite front
road, the height of each part of that building
shall be 1.5 times (in residential zone 1.25 times)
the distance measured horizontally from that
part to that wall line, or less, and at the same
time it shall not exceed the width equal to or
less than 1.5 times the width of front road (1.25
times in residential zone) plus 8 m.
(In Case Level of Road and Building Site not at
Same Height)
Article 136. In case the level of building site is
higher than front road by 1 m. or more, the front
road shall be considered to exist at tbe level
equal to 1/2 or the difference of levels or the
ground and building sites and the front road
minus one meter.
2 In case the administrative agency concerned
deems it extremely improper to apply the pro*
cedures as prescribed in the provisions of the
preceding paragraph by reason of the special
character of feature of land, irrespective of the
provisions of said paragraph, the height of the
position of that road may, by regulation, be
determined as deemed proper so long as the
height is kept within the level of ground at the
position and site prescribed by the provisions of
the same paragraph.
CHAPTER VIII Miscellaneous Provisions
!
(Similarity of Uses)
Article 137. The mutual relation of similar uses
as provided for in the proviso to Article 87 paragraph
2 of the Law shall, in case of existing
building, mean the mutuality of uses belonging to
the same item in the following items:
(1) Theater, cinema, show house, auditorium,
meating place ;
(2) Department store, market;
(3) Hotel, Ryokan (Japanese hotel) ;
(4) Apartment house, dormitory, lodging house,
hospital, medical office (excepting that which
has no accommodating facilities for patients).
Regarding the application of the provisions of
Article 49 of the Law or Article 50 paragraph 2
or paragraph 4^ of the Law, irrespective of the
preceding paragraph, and in the case of existing
building, mean the mutual uses of the same item
of each item (if there is any item separated by
parenthesis within the item, meant by that item ;
in paragraph (c) item 1 item (1), item (2), item
(3), item (4) and item (12) where it says "manufacture"
shall also include disposal as well as of
annexed Table No. 1 of the Law (excluding parts
concerning articles or things of paragraph (A)
item 1 paragraph (B) item (1) and paragraph (C)
item 2 item (1), item (2), item (3), item (4) and
-35-
i
item (12)) and the each item of annexed Table
No. 2 of the Law.
3 Regarding the designation of similarity of uses
provided for in the proviso to the same paragraph
in case of applying mutatis mutandis of the
provisions of the by-law given in the same paragraph
in accordance with the provisions of Article
87 paragraph 2 of the Law irrespective of the
provision of paragraph 1, separate provision may
be made by the same by-law.
(Designation of Structures)
Article 138. In accordance with the provisions of
Article 88 paragraph 1 of tfie Law, the following
items of structures (excluding those concerning
operation, safety, etc., within the site of railway
and tramway shall be designated :
(1) Chimney exceeding 6m. in height (in case
there is frame for support or stay lines, the
same included and the stove-chimney excluded) ;
(2) Reinforced concrete column, steel column,
wooden column exceeding 15m. in height or
other similar ones (excluding flag pole and
transmission poles for electricity) ;
(3) Advertisement tower, advertisement boanjn
decoration tower, memorial tower, and other
similar structures ;
(4) Wooden elevated tank, silo and watch tower
exceeding 8m. in height or other similar
structures ;
(5) Retaining walls exceeding 2m. in height,
(Chimney and Stays at Chimney)
Article 139. Regarding the chimney given in paragraph
1 item (1), of the preceding Article in
addition to applying mutatis mutandis the provisions
of Article 36, Article 37, Article 40, Article
41, Article 47, Article 51 paragraph 1, Article 52,
Article 53, Section 5? Section 6 (excluding Article
76 to Article 78 inclusive) and Section 7 (Article
51 paragraph 1, Article 53, Article 71, Article 72,
Article 74 and parts applying mutatis mutandis of
Article 75 only) the following items shall apply
respectively according to the structural requirement:
(1) Chimney constructed of terra cotta pipes,
concrete pipes or pipes of similar make shall
use mortar with cement at each connection or
joint, and it shall be tied firmly to the supporting
frame, or supporting frame and stay wires.
However, those exceeding 10 m. in height shall
be built of self-supporting frames ;
(2) Chimney of masonry construction shall be
provided with steel frame to prevent it from
falling down;
(3) In reinforced concrete chimney, the thickness
of concrete cover over steel bars shall be
more than 5cm;
(4) Chimney exceeding 16m. in height shall be
of reinforced concrete construction which requires
no stay wires.

2 Stay wires of achimney shall be fixed to areinforced
concrete pile or to a building or structure
free from getting rot or to a wooden pile treated
with creosote or the like.
(Reinforced Concrete Columns, etc.)
Article 140. Regarding those given in Article 138
item 2, the provisions of Article 36, Article 37,
Article 40, Article 41, Article 47, Section 5 and
Section 6 (excluding Article 76 to Article 78 inclusive)
shall apply mutatis mutandis.
(Advertisement Tower or Elevated Tank, etc.)
Article 141. Regarding those given in Article 138
item (3) or item (4), they shall be of construetion
other than that of masonry or plain concrete
structure.
2 Regarding those given in the preceding paragraph,
the provisions of Article 36, Article 37,
Article 40 to Article 42 inclusive, Article 44,
Article 46 paragraph 1, Article 47, Section 5 and
Section 6 shall apply mutatis mutandis.
(Retaining Walls)
Article 142. Regarding the retaining walls mentioned
in Article 138 item (5), in a addition to applying
the provisions mutatis mutandis to the provisions
which apply mutatis mutandis in Article
36, Article 37 paragraph 3, Article 51 paragraph
1, Article 62, Article 72 paragraph 1, Article 72,
Article 73 paragraph 1, Article 74, Article 75,
Article 79 and Section 7, the following items shall
be required for their structures :
(1) To be constructed of reinforced concrete,
stone wall, and other constructions that use
materials to resist decay;
(2) Back of stone wall shall be consolidated with
concrete, and joints between each stones shall
be well cemented; <
(3) Weep holes shall be placed to chain off
water in back of retaining wall.
(Moderation of Restrictions for Temporary
Buildi ngs)
Article 143. Regarding temporary buildings given
in the first column of the following table the
provisions of each column shall not apply :
Kind of
temporary
building
Temporary buildings
prescribed
in the provisions
of Article 85
paragraph 2
Temporary
ing under
build-
the
provisions ot
Article
graph
85 para-
4 of the
Law
Provisions that do not apply
The provisions of Article 22,
Article 29, Article 30, Article
35, Article- 37, Article 38,
Article 46, Article 48, Article
49, Article 67, Article 70,
.article i±^, /irucie jl±** anu
Chapter V to Chapter VII
inclusive
The provisions of Article 22,
Article 29, Article 30, Article
35, Article 37, Article 38,
Article 46, Article 49, Article
67, Article 70, Article 112,
Article 114 and Chapter VI
to Chapter VII
-36
Temporary building
under the
provisions of
Article 85 paragraph
5 of the
Law
The provisions of Article 22,
Article 29, Article 30, Article
35, Article 37, Article 38,
Article 46, Article 49, Article
67, Article 70 and Chapter
VI and Chapter VII
2 Of the structures given in Article 138 item (1)
to item (4) inclusive, which with the period of
temporary occupation ndt to exceed 2 years, the
parts concerning the application mutatis mutandis
of the provisions of Article 37, Article 67 and
Article 70 mentioned In the provisions of Article
139 to Article 141 inclusive shall not apply.
Supplementary Provisions :
(Date of Enforcement)
1. In this Cabinet Order, the provisions of Chapter
I Section2 shall come into force as from the day
of its promulgation and other provisions, as from
November 23, 1950.
(Special Case of First Examination of Qualification
after the Enforcement of the Law)
2. In the first examination of qualification after
the enforcement of the Law irrespective of the
provisions of Article 4 paragraph 3, a person who
had administrative experience for more than 10
years regarding the former Urban Building Law
(Law No. 37 of 1919) or execution of the Building
Standard Law and who also, within five years
previous to the day of enforcement of the said
examination of qualification, had post as chief of
bureau, division, or section concerned with building
administration in To, Do, Fu or prefecture,
or Reconstruction Board, Construction Board or
Ministry of Construction for more than one year,
or a person who is recognized as having the
knowledge and actual and practical experience
equal or superior to those mentioned above, the
subjects given in item (6) to item (8) inclusive
shall be exempted.
(Temporary Examination of Qualification)
3. Examination for qualification to be conducted
within one year reckoning from the day of enforcement
of the Law, in addition to the examination
of qualification under the provisions of
Article 3 and Article 4, temporary examination
for qualification may be held in accordance with
the provisions of paragraph 4 and.paragraph 5 of
the Supplementary Provisions.
4. Temporary examination for qualification shall
be conducted to test the knowledge and experience
concerning technics and Laws and Ordinances on
buildings necessary for confirmation thereof in
accordance with the provisions of Article 6 paragraph
1 item (4) of the Law in respect to buildings.
5. Temporary examination for qualification shall
be conducted on deliberation of past records and
by tests ; deliberation of past records pertains to

uilding administration or practical experiences
respecting building execution while tests shall be
made on the subjects given in the first column
as may be required. However, persons coming
under the second column shall be exempted from
the subjects shown in the left:
6. Temporary examination for qualification in
accordance with the provisions of the preceding
three paragraphs shall be effective for the period
of 3 years only reckoning from the day of the
enforcement of the Law.
(Special Cases of Fire Doors)
7. In case of providing fire door in accordance
with the provision of Article 64 of the Law, the
buildings to bi built within the period of one
year from the day of the enforcement of this
Cabinet Order in the district to be designated
upon obtaining the consent of fire-chief of chief
of fire-station in charge of the district concerned,
if the administrative agency concerned deems it
extremely difficult to provide the fire door and
other fire prevention equipments, the simplified
fire-door constructions mentioned in any of the
following items may take place of the fire-door B
prescribed by the provisions of the same Article.
In this case the provision of Article 110 paragraph
5 shall not apply:
(1) Those made of sheet metal, asbestos sheet,
magnesium-cement sheet, fire-resisting lumber,
wired glass and others of the similar materials,
not coming under the ways of construction
mentioned in Article 110 paragraph 2 item (1)
or item (4) to item (6) inclusive;
(2) Those with wooden frames covered outside
with sheet metal.
(Partial Amendment of Enforcement Provisions
of the Local Autonomy Law)
8. The Enforcement Provisions of the Local Autonomy
Law (Cabinet Order No. 19 of 1947) shall
be partially amended as follows :
Article 18 paragraph 1 item (10) shall be
amended as follows :
10 Deleted.
(Partial Amendment of Building Restriction
Ordinance Executing Areas of War-Damage
Rehabilitation Land Re-adjustment)
9. The Building Restriction Ordinance in Execution
Areas of War-Damage Rehabilitation Land Readjustment
(Imperial Ordinance No. 389 of 1946)
shall be partially amended as follows :
In Article 1, "and Article 25 of the Urban
Building Law" and "and Article 29-(2) of the
Urban Building Law Enforcement Ordinance"
shall be deleted.
Minister of Construction
MASUDA Kaneshichi
Prime Minister
YOSHIDA Shigeru
MINISTERIAL
ORDINANCE
Ministry of Construction Ordinance
No.40
November 16, 1950
I hereby establish the Building Standard Law
Enforcement Regulations as follows in order to
execute the Building Standard Law (Law No. 201 of
1950) and the Building Standard Law Enforcement
Order (Cabinet Order No. 338 of 1950) :
Minister of Construction
MASUDA Kaneshichi
Building Standard Law Enforcement
Regulations
(Form of Application for Confirmation)
Article JL Application for Confirmation in accord-
3?-

ance with the provisions of Article 6 paragraph
1 of the Building Standard Law (hereinafter
called the "Law") shall be as given in annexed
form No. 1 consisting of original and
a copy accompanied by various drawings and
documents according to respective building, or
for buildings mentioned in item (4) of the same
paragraph, the drawings and documents given in
column (a) of the following table, for buildings in
item (1) of the same paragraph the drawings and
documents given in columns (a) and (b), for
buildings in item (2) and item (3) of the same
paragraph the drawings and documents given in
columns (a), (b) and (c). However, the drawings
and documents in column (a) may he combined
into convenient form :
2 In case times to be shown in the table of the
preceding paragraph are shown in other drawings
and documents which are to be submitted with
the application, irrespective of the provision of
the same paragraph, it is not required to include
in the drawings and documents concerned.
3 When special administrative agency deems it
specially necessary for giving confirmation that
the building in the submitted application is properly
prepared in accordance with the provisions
of the regulation based on the provisions of
Article 39 paragraph 2, Article 40, Article 43
paragraph 2, Article 53 paragraph 3 and Article
68 paragraph 3 of the Law, it may, by regulations
in addition to the provisions provided in
the same paragraph, establish necessary provisions
respect to drawings and documents to be
submitted together with the application.
4 In case the plans for construction of the building
in the application are drawings and documents
prepared by architect, the special _administrative
agency may, irrespective of the
provision of the paragraph 1, by regulation,
prescribe to the effect that it need not to submit
whole or a part of the drawings and documents
given in column (c) of the same Table.
(Form of Notice of Confirmation)
Article 2. The notice of confirmation in accordance
with the provision of Article 6 paragraph 2
of the Law shall be given by filling in the column
of confirmation notice in a copy of application
for confirmation mentioned in paragraph 1 of
the preceding Article.
2 The notice to the effect that it fails to satisfy
the requirements of the provisions of Article 6
paragraph 3 of the Law shall be done by the
notice of Form No. 2 in annexed sheet accompanied
with the copy of the application for confirmation
of paragraph 1 of the preceding Article
together with the accompanying drawings and
documents in the application.
3 The form of notice for notifying to the effect
that no decision will be possible as to whether
it satisfy or fails to satisfy the requirements of
the provisions of Article 6 paragraph 3 of the
Law shall be as shown in Form No.3 in annexed
sheet.
(Application for Confirmation of Structural and
Form of Notice of Confirmation)
Article 3. Application for confirmation to be submitted
to the building official in case one intends
to erect a structure given in Article 138 of the
Building Standard Law Enforcement Ordinance
(hereinafter called *Ordinance") shall be as
shown in Annexed Form No. 4 original and copy
together with accompaniment of the following
drawings and documents.
-38-

2 In case application for confirmation respect to
structure is to be submitted in combination with
the application for confirmation of building, in place
of the application for confirmation of the preceding
paragraph, the application for confirmation of
Article 1 paragraph 1 accompanied with the documents
inscribed with the required matters in the
column "outline of structure" within the Annexed
Form No. 4 and the drawings given in the Table
of the preceding paragraph (sketch map of
surroundings of site or plot plan may be left out
in case the items to*be shown in sketch map of
surroundings of site or in plot plan are shown in
sketch map of surroundings of site or in the plot
plan required in Article 1 paragraph 1) shall be
submitted.
3 In case the plans for construction of structure
in the application are drawings, specifications
and documents prepared by architect, the special
administrative agency may, irrespective of the
preceding two provisions and by regulations,
prescribe to the effect that the structural details
given in the Table of paragraph 1.
4 The provisions of the preceding Article shall
apply mutatis mutandis respect to the notice of
confirmation of structure.
(Report of Completion of Work and Form of Inspection
Completed)
Article 4. Annexed Form No. 5 and Form No. 6
shall be used respectively for written report
(report, work completed) on work completed in
accordance with the provisions of Article 7
paragraph 1 of the Law and for certificate of inspection
completed in accordance with the
provisions of paragraph 3 of the same Article.
(Form of Certificate of Identification)
Article 5. Annexed Form No.7shallbe used as the
certificate of identification to be carried by the
public officials of city, town or village, or To,
Do, Fu or prefecture concerned who are ordered
by building official or by special administrative
agency or commissioned by building official in
accordance with the provisions of Article 13 of
the Law.
(Report of Starting of Work and Report of
Removal)
Article 6. The report (report on work to start) to
-39-
the effect that the work onbuilding is to be started
and report (report On removal) to the effect that
the building has been removed as required bf
the provision of Article 15 paragraph 1 of the
Law, shall be submitted through the hands of building
official by using the Annexed Form No. 8 and
the Annexed Form No. 9 respectively.
(Application for Designation of the Location of
Road)
Article 7. A person who wishes to be designated
with the location of road as prescribed in the
provision of Article 42 paragraph 1 item (5) of
the Law shall submit two copies, original and
copy, of application to the special administrative
agency together with respective drawings given
in the following table and the written consent of
the owner of land to become the site of the road
(hereinafter called "Land") or a person or persons
holding the rights over the land or building or
structure in the land:
(Public Notice and Informing Designation of
Location of Road)
Article 8. When special administrative agency designates
the location of road by basing on the
application mentioned in the preceding Article
paragraph 1, it shall give out public notice to
the effect and at the same time, the notice to
the effect shall be sent to the applicant.
(Form of Sign Board for Confirmation on Working
Site)
Article 9. The form of sign for confirmation on
working site in accordance with Article 89 paragraph
1 of the Law shall be as shown in Annexed
Form No. 10.
(Application Form for Examination of Qualification)
Article 10. Application form for examination of
qualification of building officials in accordance
with the provision of Article 9 of the Ordinance
shall bs as shown in Annexed Form No. ll.
Supplementary Provision :
This Ministerial Ordinance shall come into force
as from November 23, 1950.

No.
No.
Annexed Form No. 1
Form No. 1 Original (B 5)
(Original) Application for Confirmation (Building)
(Note) Before filling in, read carefully the items to be noted
in lower column of copy
I hereby apply for confirmation in accordance with the provisions
of Article 6 paragraph 1 of -Building Standard Law. This application
and annexed drawings and documents are inscribed with
matters and facts nothing but true.
Name of applicant : (Seal)
1. Name and address of Owner|
-^Column for fee
Tel. (
2. Name and address of agent Tel. (
3. Designer's qualification his
name and address
Class Architect Registered No. Tel. (
o
0
4. Name and address of contractor
or builder
fi..
.2
Date :
14. Other matters if required
a) Use
d) _RoofingL materials)
b) Kind of work
e) Exterior wall |
c) Structure
f) Underneath eave
a©
Story of floor floor floor floor Total
& £
TO -W* Part applied
CID Part not applied
|fe £
:s •EP Total
h) Dimension of columns!
1) Highest part(
CO ow Spacing of horizontal
m) Highest
0)
material
eave height
3a Height of story or
n) Height of
floor
living room
Ceiling height of liv-
o) Latrine
Water closet
in8
ing room
Building equipment
facility
[^Column for receiving of file •E^Column for opinion
of Fire Board
bail out (kairyo)
lolumn for Decisioni^olumn for Con-
XlllllCtLiUlt
nu.
Date : i Date:
Signed by :
(Seal of person in charge)
Signed by:
(Seal of person
in charge)
-40-

Annexed Form No. 1 Copy (B 5)
Copy Confirmation Notice (Building)
o
0
^Column for Confirmation Notice :
I thereby notify that this application and the plan and design of building and accompanied
drawing and documents thereof as well as the prepared site for building and building
equipments and facilities are confirmed as satisfying the requirements of the provisions
of the Law and the Orders, Regulations based thereto.
Confirmation No.
Date of confirmation :
1. Name and address of owner]
2. Name and address of agent]
3. Qualification of designer
Name and address
:
4. Contractor or builder
Name and address
a) Name
No. of
of
lot
place and
.2v
OHW
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16
b) Use zone
c) Fire zone
6. Principal uses
8. Area of site
9. Building area
10. Total floor area
12. When work expectedstart | Date:
14. Other matters deemed
necessary
a) Use
03
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in.H
b) Kind of work
c) Structure
According to story of
floor
Part applied for
Part not applied
Total
h) Dimention of column
i) Spacing of horizontal I
members
j
j) Story height
k) Ceiling height of
living room
Building Official (Name^ ___Seai
Tel. (
)..
Tel. ( J_
Class Architect Registration No. Tel (
Construction Contractor's Registration No. Tel. (
1^ d) Other
district, zone,
area
7. Kind of
work
^^HSSiSa Total
New, enlargement,
remodel , removal ,
change of use, large
scale repair, large
scale remodelling
tio fc 3*0
u_OS
£To
13. When work expected to complete | Date:
d) Roofing
materials
e) Exterior
wall
f) Underneath
eave
floor floor floor Total
1) Height
highest
of
point
m) Highest
n)
eave
Floor height]
of living room|
o) Kind
latrine
of
Residential. Commercial,
Quasi-industrial,
Industrial,not designated]
Fire zone A, Fire zone
B, not designated
[Water closet
bail
(kairyo)
out
p) Kind of building
equipment
(Note) In case building in application constitute 2 or more houses, fill in column "brief description
of building in application according to houses" in each separate paper for
each separate house (excluding house with total ficor area of one house less than 10
sq.m.) and to be attached.
Where marked ^ applicant not to fill in. Column 4 to be left vacant if no confractor
or builder is decided upon. Mark by ( ) the columns 5-b), c), 7, 15-c). Column6
to be described distinctly and concretely by facts. If there any other items deemed
appropriate to go in there, put in column 14. Columns 15 h), i) to be filled in for
wooden structures only. Column 15-p) in separate sheet preferably. Numerals in
Arabic and unit in meter preferred. Other item believed to belong here but not able
to write may be written in separate sheet to be attached to this sheet.
-41-

Annexed Form 1. Additional sheet on outline according to houses

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Annexed Form No. 4
Form No. 4 Original (B 5)
(Original) Application for Confirmation (Structure)
(Note) Before filling in, read note in bottom of sheet for copy •E^Column for fee
I hereby submit application for confirmation in accordance with
Article 88 paragraph 1 of the Building Standard Law.
I certify that matters and facts given in this application and
in annexed drawings and documents are true and nothing but
true.'
Name of Applicant
(Seal)
o
1. Name and address of
owner
2. Name and address of
agent
3. Oiialifimtinn nf rlPiRiVnp.r
and his name and ad- | Class Architect Registration No.
dress !
4. Name of contractor or
builder and his address
(Tel.)
(Tel.)
(Tel.)
Construction Contractor, Registration No. (Tel.)
5. Name of place of site
and No.
6. When expect to start
work
Date :
7. When expect to
complete work
Date :
8. Remarks
a) Kind of structure
b) Height of
structure
o
9. Brief
description
of
St ructure
c) Construction
of structure
d) Scope of
structure
^•EColumn for receiving •E^Column for decision •E^•EColumn for confirmation No.
Date : Date :
No.
Signed by : official in charge
(Seal)
No.
Signed by: official in charge
(Seal)
44-

Form No. 4 Copy (B 5)
Copy Notice for Confirmation (Structure)
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-46-

Form No. 7 (front page)
S.5cm
Date : File No. (keep for 1 year)
Entry
Certificate
to
Building and Construction Site
Seal
''
(Administrative Agency concerned)
Form No. 7 (back page)
Bearer of this certificate is authorized to exercise his duty of inspecting building or
site of work in accordance with the provision of Article of the Building Standard Law
concerned are as follows :
Extracts from Building Standard Law :
Article 12 paragraph 2:-In case the public official of To, Do, Fu or prefecture who
has been ordered by the governor of To, Do, Fu or prefecture, or who has been delegated
the power by the building official or building official intends to make confirmation,
inspection or to give order under the provisions of Article 5 paragraph 2, Article \
6 paragraph 2, Article 8 paragraph 1, Article 9 paragraph 1 or paragraph 1 of the
preceding Article may enter the building concerned or the construction field thereof,
and may test or inspect the building, building equipment, building materials, plans
and specifications and other things concerned with the construction work. However,
in case he enters the building actually used for the purpose of living place, he shall,
in advance, obtain the consent of the resident thereof.
Article 13. The public official of To, Do, Fu or prefecture who has been ordered by
building official or the governor of To, Do, Fu or prefecture, or who has been delegated
the power by the building official, in case he enters the building or construction
field in accordance with the provision of paragraph 2 of the preceding.Article, he
shall carry with him the certificate of identification and shall show him the same
when requested by the person concerned.
47-

Form No. 8
Form No. 8 (B 5)
Report for starting of work in accordance with the provision of Article 15
paragraph 1 of the Building Standard Law
Date
To : , Governor
Name and address of owner: Seal
1. Building site
2. When expect to
start work
Date :
3. Time required to
complete from
years
the day started
:_
months
•E^•EColumnfor Organ through which
this file is received
Confirmation No. No.
Day of Confirmation 1 Date:
4. Kind of work New construction Enlargement Remodelling
5. Principal uses
21
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£!u
'3 aj
Q3^
-"SS
a) Use
b) Structure
c) Total area
7. Appropriation for
work
.5 ,n
2-3S
'351
|£'o5
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