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 SPRINKLER PIPING:
2.4
Earthquake Sway Bracing: Earthquake sway bracing shall be
2.4.1
installed on all sprinkler systems in accordance with NFPA 13.
Interior Sprinkler Piping Layout: For non CQC projects, interior
2.4.2
sprinkler piping layout shall be done by the contractor based on a performance
specifications. Contract drawings. shall show underground feed main and
sprinkler riser, but not the interior piping and sprinkler heads.
2.4.2.1 Interior Sprinkler Piping Layout (Philippines, Okinawa and
Japan): Piping layout(s) shall be shown on contract drawings per Item 7.10.
2.4.3
Above Ground Piping: Do not use plastic pipe or thin wall steel
pipe less than Schedule 40 for above ground sprinkler piping.
2.4.4
Underground Feed Mains:
Underground sprinkler feed mains shall be
no smaller than six inches in size.
2.5
SPRINKLER RISER:
2.5.1
Location:
The preferable location for all sprinkler risers is
inside the building.
If the sprinkler riser is located outside, a protective
shelter shall be built
around it. Provide guard posts for existing sprinkler
risers located in open
industrial or warehouse areas.
2.5.2
Anchor Rods: Provide anchor rods at the base of each sprinkler
riser according to Figure A-8-6.2(1) of NFPA 24 (1987 edition). Show these
rods on riser details on contract drawings.
2.5.3
Control Valves: Each sprinkler riser shall be controlled by
either a Post Indication Valve (PIV) or an OS&Y gate valve, but not both.
Pre-action and deluge systems shall have an OS&Y gate valve.
2.5.3.1 Supervision of Control Valves: All valves controlling sprinkler
systems shall be supervised by one of the methods outlined in NFPA 13 (1991
edition). Plans or specifications shall indicate the type of supervision
desired.
PRE-ACTION SYSTEM SPRINKLER SYSTEMS:
2.6
Pre-Action Piping Supervision: For pre-action systems, use either
2.6.1
plant air or tank-mounted air compressor(s). Specify a low air pressure
switch for transmitting a low air signal to the FACP.
Pre-Action Deluge Valve Actuating Circuit: The pre-action deluge
2.6.2
valve actuating circuit shall be Class A or solenoid coil supervised.
SPRINKLERS IN ELECTRONIC AREAS: Where sprinklers are located in
2.7
electronic areas, electronics power must automatically shut down prior to
water flow. Pre-action valves shall be operated by cross-zoned smoke
detectors. Pre-action sprinkler heads installed in the pendant position shall
be the dry pendant type.
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