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schedule. Generally, you can make changes to
the schedule within 45 days of crew arrival on
the job. Good supevisors ensure equipment,
material, tools, and other facilities are on the
job when needed. Missing items require an
extra trip back to camp; this affects both
production and crew morale.
PLANNING, ESTIMATING, AND
SIZING PLUMBING SYSTEMS
You will provide input on the planning,
estimating, and sizing of plumbing systems.
This input may concern installation
techniques, types of material required,
quantity and size of piping or fittings, and so
forth. This section provides information you
must consider for planning and estimating a
plumbing project. The National Standard
Plumbing Code, military specifications, and
job specifications provide more concise
information.
SANITARY SYSTEMS
Various types of pipe and fittings are used for
sanitary waste and drainage. However, the location
of the installation determines the type of material
you must use. Threaded pipe that is underground
requires coal tar protection. Install underground
sanitary waste and drainage lines in a separate
trench from the water-service line. The
underground water service and the building drain
or sewer should not be less than 6 feet apart
horizontally and placed on undisturbed or
compacted earth. When separate systems of
sanitary drainage and storm building drains are
placed in one trench, they should be placed side-
by-side. A building sewer or building drain
installed in fill dirt or unstable ground should be
made of cast-iron soil pipe, except that nonmetallic
drains may be used when laid on an approved
continuous supporting system. Table 7-1 depicts
code requirements for pipe usage.
Table 7-1.—Sanitary Waste and Drain Piping
7-2
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