lead or 0.45 kg (16 ounce) soft copper membrane, 600 mm (24
inches) square.
6.
PIPE BASEMENTS
6.1
Evaluate the use of full or partial pipe basements on an
individual project basis through a design analysis that indicates
that a pipe basement is the most efficient and economical method
of adapting piping, duct, and electrical conduit systems to the
building. Design pipe basements to provide a minimum clearance of
1200 mm (4'-0") under pipes, ducts, and electrical conduits for
access to these systems for maintenance and repair. Locate all
areas of a pipe basement between two means of emergency exits.
Extend stairways down to the pipe basement by means of industrial
stairs.
7
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