TN-18 ramnagar Drg.line TENDER 2012-13 - Ahmedabad Municipal ...

ITEM NO. 5
Constructing Slab Type Chamber of following size incl. excavation, refilling brick bats cement concrete
(1:5:10) for foundation, C.C. channel (1:2:4) finished, 15 mm. th cement plaster inside & outside in
C.M.1:3 finishing with cement slurry, P/F 4 mm dia M.S Steel HDPE coated steps 35 cm c/c at 35 cm
staggered Masonry in C.M. 1:5, R.C.C. slab in C.C. 1 : 1.5 : 3 including centering and reinforcement but
excluding cost of manhole seat cover etc. complete. Of size 0.75 x 0.75 mt. (inside clear) and Depth from
0.00 to 1.20 mt. For pipe dia
(i) Excavation : This shall be done as per specification in Item No. 2
(ii) Brickbats cement concrete in proportion (1:5:10) For detailed specification refer R & B Dept. booklet for General
Technical Specification for building works , Page no. 31 , Section. No. 5.3.8(a)
(iii) Brickwork(1:5):
For detailed specification refer R & B Dept. booklet for General Technical
Specification for building works , Page no. 43 , Section. No. 6.12(B).
(iv) C.C. Channels :
Cement concrete of the invert and channels of manholes shall consist on a part 1 part of cement 2 part of sand, 4 part
of black trap metal or other approved material of size 1/4' to 1' well grade as per instruction. The work shall be done as
per P.W.D. hand book specification No. 20 and as per general instruction of C.E. The rate includes all necessary
materials mixing lifting placing ramming watering etc. the expressed faces to be neatly of the channels shall be half
round as per drawing and instructions of the engineer in charge.
(V)Cement Plaster(1:3) :
For detailed specification refer R & B Dept. booklet for General Technical
Specification for building works , Page no. 104 , Section. No . 17.58(I) Except
that the thickness of the plaster shall be 15 mm instead of 10 mm.
Carting of Surplus Earth :
The surplus earth which is left an site after refilling and proper watering of the trenches shall have to be carted away
upto a distance within 30 mts. & shall be spread at the site according to the direction of Engineer-in-charge in charge.
RCC Work :- In general, plain and reinforced concrete work for manholes shall be carried out in accordance with
latest version of IS 456 unless otherwise specified in this specification. The slab of manhole shall be cast with shutters
lined with plywood and shall be smooth finished. For avoiding surface cracks due to variation in atmospheric
temperature and exposure to direct sunlight, RCC slab of manholes after casting shall be kept wet. M 20 grade of
concrete used for construction of RCC manholes shall have minimum cement content of 360 kg/cum of concrete. Bar
bending schedule for reinforcement shall be prepared by contractor and got approved from owner/ engineer before
proceeding with the work. Minimum cover to the reinforcement shall be 40 mm.The rate includes cost of all labour,
materials, tools and plant etc. required for satisfactory completion of this item as described above.& the drawing as per
A.M.C Dr. S.O.R shall be final.
FRC SEAT COVER:
frame shall be fixed in cement concrete all around and finished with neat cement. The . F.R.C (L.D.-25) chamber seat
and cover shall be as per central store approved design. Cover [ 706 x 556 x 50 mm rectangular cover. 2.5 mt load
design 50 x 2 mm MS flat all round. 12 mm ? plain round bar for lifting the cover & should be fitted with plastic caps
] and frame [ 600 x 450 mm clear opening ,outer size 816x 666x100 mm.on the upper periphery of frame 25 x 3 mm
wide M.S. flat should be well embedded in concrete to protect the edge of frame ]etc.comp.
Mode of measurement: The rate shall be for a unit of No.basis
ITEM NO : 6
Constructing Slab Type M.H. Chamber of following size (1.0 mt x 0.75 mt. )incl. excavation,
refilling brick bats cement concrete (1:5:10) for foundation, C.C. channel (1:2:4) finished, 15 mm.
th cement plaster inside & outside in C.M.1:3 finishing with cement slurry, P/F 4 mm dia M.S
Steel HDPE coated steps 35 cm c/c at 35 cm staggered Masonry in C.M. 1:5, R.C.C. slab in C.C.
1 : 1.5 : 3 including centering and reinforcement but excluding cost of manhole seat cover etc.
complete (a)up to 2 mt depth
Manhole shall be provided at every change of alignment, gradient or diameter of sewer/storm
water drains, Bends and junctions in the sewer/drain shall be grouped together in manhole as far as