54
I-800
Concealed Space Height (Figure 2, Example 4 and 4a):
•
Height of the Concealed Space from the Bottom of the Upper Deck
Joist to the Top of the Ceiling Surface (Example 4):
12-inches Mini-
mum to 36-inches Maximum
•
Height of the Concealed Space from the Bottom of the Upper Deck
Joist to the Top of the Ceiling Joist (Example 4a):
8-inches Minimum
•
Maximum Roof Pitch:
2/12 (9°)
Additional Information:
• When Victaulic Model V2502 or Viking Coin (VK900) Specific Applica-
tion Sprinklers are used with Victaulic FireLock CPVC Sprinkler System
Products, the bottom of the horizontal run must be no greater than 6
inches or
1
/
3
of the total space above the ceiling (whichever is smaller).
The Victaulic FireLock CPVC Sprinkler System piping can then be used
to supply the Victaulic Model V2502 or Viking Coin (VK900) Specific
Application Sprinklers as well as the sprinklers below the ceiling. All
other instructions in this design and installation manual must be refer-
enced during system installation.
NOTE:
If 12-inch trusses are used in
Figure 1, the bottom of the horizontal run must be no greater than 4 inch-
es above the ceiling. In Figure 2, if the concealed space height from the
bottom of the upper deck joist to the top of the ceiling joist is the mini-
mum 8-inch requirement, the bottom of the horizontal run must be no
greater than 4 inches above the ceiling (refer to Figures 1 and 2, Exam-
ple 5).
• When Victaulic FireLock CPVC Sprinkler System piping must be offset
up and over an obstruction, and the bottom of the pipe will be located
more than 6 inches or
1
/
3
of the total space above the ceiling, additional
Victaulic Model V2502 or Viking Coin (VK900) Specific Application
Sprinklers must be installed to protect the CPVC product (refer to Fig-
ures 1 and 2, Example 6). The sprinkler must be installed directly over
the obstruction (refer to Figures 1 and 2, Example 7).
• When using
3
/
4
-inch piping, all sprigs over 12 inches must be laterally
braced, per NFPA standards.
• When using 1-inch or larger piping, a hanger must be located at the
truss closest to a sprig for restraint.
• A minimum lateral distance of 18 inches must be maintained between
CPVC pipe and heat sources (i.e. fan motors, heat lamps, HVAC heat
pump units, etc.).
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