matter into the supply line. A concrete thrust block shall be provided at
the elbow where the pipe turns up toward the floor. In addition, joints
shall be anchored in accordance with NFPA 24 using pipe clamps and steel
rods from the elbow to the flange above the floor and from the elbow to a
pipe clamp in the horizontal run of pipe. Buried steel components shall be
provided with a corrosion protective coating in accordance with AWWA C203.
Piping more than 1500 mm 5 feet outside the building walls shall meet the
requirements of Section 02510A WATER DISTRIBUTION SYSTEM.
3.6
EARTHWORK
Earthwork shall be performed in accordance with applicable provisions of
Section 02300 EARTHWORK.
3.7
ELECTRICAL WORK
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NOTE: Coordinate power and alarm requirements with
the contract drawings and other specification
sections.
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Except as modified herein, electric equipment and wiring shall be in
accordance with Section 16402 INTERIOR DISTRIBUTION SYSTEM. [Alarm signal
wiring connected to the building fire alarm control system shall be in
accordance with [Section 13850A FIRE DETECTION AND ALARM SYSTEM, DIRECT
CURRENT LOOP] [and] [Section 13851A FIRE DETECTION AND ALARM SYSTEM,
ADDRESSABLE.]] [All wiring for supervisory and alarm circuits shall be
[#14] [#16] AWG solid copper installed in metallic tubing or conduit.]
Wiring color code shall remain uniform throughout the system.
3.8
DISINFECTION
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NOTE: For modification of existing systems, provide
specific procedures for disinfection of new
equipment. If sprinkler piping is isolated from the
domestic water piping systems by means of a reduced
pressure backflow prevention assembly or if
sprinkler piping in not connected to the domestic
water piping, this paragraph should be deleted.
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After all system components are installed and hydrostatic test(s) are
successfully completed, each portion of the sprinkler system to be
disinfected shall be thoroughly flushed with potable water until all
entrained dirt and other foreign materials have been removed before
introducing chlorinating material. Flushing shall be conducted by removing
the flushing fitting of the cross mains and of the grid branch lines, and
then back-flushing through the sprinkler main drains. The chlorinating
material shall be hypochlorites or liquid chlorine. Water chlorination
procedure shall be in accordance with AWWA C651 and AWWA C652. The
chlorinating material shall be fed into the sprinkler piping at a constant
rate of 50 parts per million (ppm). A properly adjusted hypochlorite
solution injected into the system with a hypochlorinator, or liquid
chlorine injected into the system through a solution-fed chlorinator and
booster pump shall be used. Chlorination application shall continue until
the entire system if filled. The water shall remain in the system for a
minimum of 24 hours. Each valve in the system shall be opened and closed
SECTION 13930A
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