lock-type longitudinal seam. Except in pipe chases or interior walls, the
annular space between pipe and sleeve or between jacket over insulation and
sleeve in nonfire rated walls, partitions, and floors shall be sealed as
indicated and specified in Section 07920 JOINT SEALANTS and in fire rated
walls, partitions, and floors shall be sealed as indicated and specified in
Section 07840 FIRESTOPPING. Metal jackets shall be provided over
insulation passing through exterior walls, fire walls, fire partitions,
floors, or roofs, shall not be thinner than 152.4 micrometers 0.006 inch
thick aluminum, if corrugated, and 0.4064 mm 0.0l6 inch thick aluminum, if
smooth, and shall be secured with aluminum or stainless steel bands not
less than 10 mm 3/8 inch wide and not more than 200 mm 8 inches apart.
When penetrating roofs, before fitting the metal jacket into place, a 13 mm
1/2 inch wide strip of sealant shall be run vertically along the inside of
the longitudinal joint of the metal jacket from a point below the backup
material to a minimum height of 900 mm 36 inches above the roof. If the
pipe turns from vertical to horizontal, the sealant strip shall be run to a
point just beyond the first elbow. When penetrating waterproofing membrane
for floors, the metal jacket shall extend from a point below the backup
material to a minimum distance of 50 mm 2 inches above the flashing. For
other areas, the metal jacket shall extend from a point below the backup
material to a point 300 mm 12 inches above floor; or when passing through
walls above grade, jacket shall extend at least 100 mm 4 inches beyond each
side of the wall.
3.4.1.1
Pipes Passing through Waterproofing Membranes
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NOTE: Typical details of pipe sleeves through
walls, floors, and roofs are shown in TM 5-805-6.
The applicable detail plates will be completed and
included in the contract drawings.
**************************************************************************
In addition to the pipe sleeves referred to above, pipes passing through
roof or floor waterproofing membranes shall be provided with a 1.8 kg 4
pound lead flashing or a 453 g 16 ounce copper flashing, each within an
integral skirt or flange. Flashing shall be suitably formed, and the skirt
or flange shall extend not less than 200 mm 8 inches from the pipe and
shall set over the roof or floor membrane in a troweled coating of
bituminous cement. The flashing shall extend up the pipe a minimum of 250
mm 10 inches above the roof or floor. The annular space between the
flashing and the bare pipe or between the flashing and the
metal-jacket-covered insulation shall be sealed as indicated. Pipes up to
and including 250 mm 10 inches in diameter passing through roof or floor
waterproofing membrane may be installed through a galvanized steel sleeve
with caulking recess, anchor lugs, flashing clamp device, and pressure ring
with brass bolts. Waterproofing membrane shall be clamped into place and
sealant shall be placed in the caulking recess. In lieu of a waterproofing
clamping flange and caulking and sealing of annular space between pipe and
sleeve or conduit and sleeve, a modular mechanical-type sealing assembly
may be installed. The seals shall consist of interlocking synthetic rubber
links shaped to continuously fill the annular space between the
pipe/conduit and sleeve with corrosion protected carbon steel bolts, nuts,
and pressure plates. The links shall be loosely assembled with bolts to
form a continuous rubber belt around the pipe with a pressure plate under
each bolt head and each nut. After the seal assembly is properly
positioned in the sleeve, tightening of the bolts shall cause the rubber
sealing elements to expand and provide a water-tight seal between the
pipe/conduit and the sleeve. Each seal assembly shall be sized as
SECTION 15555A
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