switches, programmable thermostats, HVAC controllers, elevator controllers,
utility monitoring and control systems, fire detection and suppression
systems, alarms, security systems, traffic signals, and other facilities
control systems utilizing microcomputer, minicomputer, or programmable
logic controllers.
2.2
ABOVEGROUND PIPING SYSTEMS
Provide fittings for changes in direction of piping and for connections.
[Make changes in piping sizes through tapered reducing pipe fittings;
bushings will not be permitted.] Perform welding in the shop; field
welding will not be permitted. Conceal piping in areas with [suspended
ceiling] [and] [_____].
2.2.1
Sprinkler Piping
NFPA 13, except as modified herein. [Steel piping shall be Schedule [10]
[or] [40] for pipe sizes less than 200 mm 8 inches, and may be Schedule
[10] [30] [or] [40] for sizes 65 mm 2.5 inches and larger.] Fittings into
which sprinkler heads, sprinkler head riser nipples, or drop nipples are
threaded shall be welded, threaded, or grooved-end type. Plain-end
fittings with mechanical couplings and fittings which use steel gripping
devices to bite into the pipe when pressure is applied will not be
permitted. Rubber gasketed grooved-end pipe and fittings with mechanical
couplings shall be permitted in pipe sizes 40 mm 1.5 inches and larger.
Fittings shall be UL Fire Prot Dir listed or FM P7825 approved for use in
dry pipe sprinkler systems. Fittings, mechanical couplings, and rubber
gaskets shall be supplied by the same manufacturer. [Side outlet tees
using rubber gasketed fittings shall not be permitted.] Steel piping with
wall thickness less than Schedule 30 shall not be threaded. Steel piping
shall be [galvanized][black steel]. [Sprinkler pipe and fittings shall be
metal.]
2.2.2
Sprinkler Heads
Provide nominal 12.7 mm 0.50 inch [or 13.5 mm 0.53 inch] orifice standard
[____]sprinkler heads. No o-rings will be permitted in sprinkler
heads.[For preaction systems, the release element of each head shall be of
the [ordinary] [_____] temperature rating or higher as suitable for the
specific application.] [For deluge systems, provide open heads.] Provide
polished stainless steel ceiling plates or chromium-plated finish on copper
alloy ceiling plates, and chromium-plated pendent sprinklers below
suspended ceilings. [Provide corrosion-resistant sprinkler heads and
sprinkler head guards as required by NFPA 13.] [Provide [_____] sprinkler
heads [_____] [as indicated].] Deflector shall not be more than 80 mm 3
inches below suspended ceilings. Ceiling plates shall not be more than
12.7 mm 0.5 inch deep. Ceiling cups shall not be permitted. Automatic
sprinklers installed in the pendent position shall be of the dry-pendent
type [except that standard pendent sprinklers may be installed on return
bends when both the sprinklers and the return bends are located in a heated
area].
2.2.3
Cabinet for System
Provide a minimum [four] [_____] of each type of sprinkler head[, including
a representative sample of dry pendent type sprinklers] and sprinkler head
wrench adjacent to each deluge or preaction valve. The number and types of
extra sprinkler heads shall be as specified in NFPA 13.
SECTION 13945N
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