TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
B. Extreme care shall be taken in pipe laying to provide proper support for the full length of the barrel
of the pipe. Bedding shall be provided by mechanical excavation carried to a point 6 inches below
invert grade, and the trench bottom carefully backfilled with gravel so that when the pipe is laid to
the proper invert grade, the backfill will provide circumferential support for the bottom one-half of
the barrel of the pipe.
C. Pipe shall be inspected and both ends cleaned before being lowered into the trench. Unless
otherwise specified, the pipe shall be laid at constant slope from manhole to manhole. Care shall
be taken to lay the pipe to true lines and grades. Care must be taken to fit the joints together
properly so that the centers of the pipes shall be in one and the same straight line and so as to
give an opening of even thickness all around between spigot and socket.
D. Whenever pipe is to be laid where rock is excavated, the rock shall be removed as specified. The
bottom of the ditch will then be raised to proper grade by backfilling with 3/4 inch crushed stone
(compacted).
E. Embedment materials shall be Class I material as listed under USCA Soil Classification System
(FHA Bulletin No. 373 or ASTM D2487).
3.6 SLEEVES
A. Provide sleeves for pipes passing through floors, walls, partitions, slabs, grade beams, and
foundations.
B. Layout, size, and locate sleeves such that they be set and installed prior to pouring concrete, or
when masonry is being constructed. In the event sleeves must be placed after floor, wall partition,
or foundation has been constructed, submit in writing to and obtain approval from the Engineer on
location, quantity, and proposed method of core drilling and installing. Cost of core drilling and
installation shall be under this Contract. Core drilled openings above grade, in solid concrete need
not be sleeved, but must be clean and neat without cracking or spalling.
C. Horizontal sleeves through walls, grade beams, foundations, and partitions shall be flush with
finished wall faces. Vertical sleeves through floors shall extend 2 inches above finished floor and
be flush on ceiling or under side.
D. Size sleeves such that internal diameter is a minimum of 2 inches larger than O.D. of bare pipe for
uninsulated lines and 2 inches larger than O.D. of insulation and jacket for insulated lines. Center
pipes in sleeves. Sleeves in pits or below grade shall be painted or coated with one coat of coal
tar pitch paint or equivalent.
E. On lines passing through floors, slabs, walls, grade beams, or foundations at or below grade and
in pits, the annular space between outside of pipe or insulation and inside of sleeve shall be
packed with oakum to within l inch of both sides and the remaining space filled with asphaltic
mastic. On lines passing through walls and floors above grade, the annular space between
outside of pipe or insulation and inside of sleeve shall be packed tight with approved insulation to
within l inch of both sides of the sleeve and the remaining space filled with sealant.
3.7 PIPE JOINTS
A. Mechanically Coupled Grooved Joints - Mechanical coupling connections shall mechanically
engage, lock and seal the grooved pipe ends in a positive couple. Each coupling shall consist of
BASIC MATERIALS AND METHODS 15050-16