Earthquake Sway Bracing: Earthquake sway bracing shall be
installed on all sprinkler systems in accordance with NFPA 13.
Interior Sprinkler Piping Layout: For non CQC projects, interior
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.
22.214.171.124 Interior Sprinkler Piping Layout (Philippines, Okinawa and
Japan): Piping layout(s) shall be shown on contract drawings per Item 7.10.
Above Ground Piping: Do not use plastic pipe or thin wall steel
pipe less than Schedule 40 for above ground sprinkler piping.
Underground Feed Mains:
Underground sprinkler feed mains shall be
no smaller than six inches in size.
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.
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.
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.
126.96.36.199 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
PRE-ACTION SYSTEM SPRINKLER SYSTEMS:
Pre-Action Piping Supervision: For pre-action systems, use either
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
valve actuating circuit shall be Class A or solenoid coil supervised.
SPRINKLERS IN ELECTRONIC AREAS: Where sprinklers are located in
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.