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job was an interior project requiring machines and work pits
to be at sites within the building itself. The project called
for a total of 2000 feet of varying-diameter pipe to be pulled.
Pipe diameters included 4", 8", 10" and 16".
The 16"and some 10" pipe was for storm drains, 10"
and 8" pipe was used for sanitary sewer lines. New 16"
pipe was used as a conduit to transport 10" pipe into
the building. An 8' deep pit was dug within the building through
a 1" thick, suspended concrete sub-floor 18" above
the primary floor slab.
To
accommodate the pull, equipment had to be moved inside manually
and assembled within the pit. Pipe lengths were pulled from
outside the building where they were pre-fused as necessary.
In order to pull 16" pipe, and to pull 10" pipe
through a 45³ angle, a 40 ton machine was teamed with
a 60 ton machine creating a total of 100 tons of pulling power.
The teamed machines required the use of hollow breaking cones
to accommodate double-chaining.
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