technology. This includes, but in not limited to, telecommunications
switches, utility monitoring and control systems, fire detection and
suppression systems, alarms, security systems, and other facilities control
systems utilizing microcomputer, minicomputer, or programmable logic
controllers.
2.2
DESIGN OF FOAM SYSTEMS
Design of [pre-action] [dry-pipe] [deluge] fire extinguishing foam systems
shall be by hydraulic calculations for uniform distribution of AFFF
solution over the protected area and shall conform to the NFPA standards
listed above and to the requirements as specified herein.
2.2.1
Sprinkler Heads
Heads shall have 15 [or 13.50] mm 1/2 [or 17/32] inch orifice. No o-rings
will be permitted in sprinkler heads. [For deluge systems, provide open
heads.] [For [pre-action] [dry-pipe] systems, the release element of each
head shall be of the ["intermediate"] ["high"] temperature rating or higher
as suitable for the individual location installed.] [For [pre-action]
[dry-pipe] systems protecting rack storage, the release elements of
ceilings heads shall be of the "high" (141 degrees C286 degrees F)
temperature rating or higher as required by NFPA 13 and the release
elements of the in-rack sprinklers shall be of the "ordinary" (74 degrees C
165 degrees F) temperature rating.] Provide chromium plated ceiling plates
and pendent sprinklers below suspended ceilings. Provide corrosion
resistant sprinkler heads and sprinkler head guards as required by NFPA 13.
[Provide water shields and head guards for all in-rack sprinklers.]
2.2.2
Cabinet
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NOTE: Deluge systems do not require a sprinkler
head cabinet.
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Provide extra sprinkler heads and sprinkler head wrench in a metal cabinet
adjacent to the pre-action valve within each building. The number and types
of extra sprinkler heads shall be as specified in NFPA 13.
2.2.3
[Pre-Action] [Deluge] Valves
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NOTE: Select this paragraph or the paragraph below
entitled "Dry-Pipe Valves".
**************************************************************************
Valves shall be operated by a detection system listed for releasing service
and independent of the building fire alarm system. [[Pre-action] [Deluge]
valve clappers shall incorporate a latching mechanism that will not be
affected by changes of pressure in the water system.] If 150 mm 6 inch
valves are used in 200 mm 8 inch risers, provide smoothly tapered
connections. In addition to automatic operation, arrange each valve for
manual release at the valve. Provide pressure gages and other appurtenances
at the [pre-action] [deluge] valves as required by NFPA 13. Provide a
detection device at the end of each actuation circuit to test the circuit
and mount the device [adjacent to the valve] between 1.83 and 2.44 meters 6
and 8 feet above the finish floor. Label each testing device to indicate
the valve it activates. [Provide remote manual releases [at [_____]]
SECTION 13958N
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