52
I-800
APPENDIX A
Design Criteria for Combustible Concealed Installations
Incorporating Victaulic FireLock CPVC Sprinkler System
Products and Victaulic Model V2502 or Viking Coin™ (VK900)
Specific Application Sprinklers
General Information:
System Type:
Light hazard, wet pipe system only
Area of Use:
Horizontal interstitial (concealed) spaces with a roof pitch of
0/12 to 2/12 (9º) maximum constructed of:
• Engineered wood and steel open trusses
• Solid or composite wood joists where the upper deck is filled with non-
combustible insulation
Minimum Distance Between Victaulic Model V2502 or Viking Coin
(VK900) Specific Application Sprinklers:
7 feet –
NOTE:
This minimum
spacing does not apply to additional sprinklers required for protection of
Victaulic FireLock CPVC Sprinkler System Products that are offset over an
obstruction
Maximum Distance Between Victaulic Model V2502 or Viking Coin
(VK900) Specific Application Sprinklers:
12 feet –
NOTE:
This maxi-
mum spacing does not apply to additional sprinklers required for protec-
tion of Victaulic FireLock CPVC Sprinkler System Products that are offset
over an obstruction.
Maximum Sprinkler Coverage Area:
144 ft
2
per sprinkler
Remote Area: 1000 ft
2
– NOTE:
This remote area does not include any
additional sprinklers required for protection of Victaulic FireLock CPVC
Sprinkler System Products that are offset over an obstruction. For solid or
composite wood construction, where the upper deck is filled with non-
combustible insulation (Figure 2), the remote area must be calculated per
NFPA 13 requirements for light-hazard applications with a smooth, flat
ceiling.
Minimum Required Density:
0.10 gpm/ft
2
Minimum Operating Pressure:
8 psi
Obstructions:
All NFPA obstruction criteria for standard spray sprinklers
apply
NOTICE
• Concealed spaces are defined as areas that have no access for storage.
• In order to be considered "solid or composite wood joist construction where the
upper deck is filled with non-combustible insulation," the insulation (including
insulation provided with a combustible vapor barrier) must completely fill the pockets
between the joists and to the bottom of the joists.
• The insulation must be secured in place with metal wire netting. The metal wire
netting is intended to hold the insulation in place if the insulation becomes wetted by
the operation of a Victaulic Model V2502 or a Viking Coin (VK900) sprinkler during a
fire.
I-800 2755 Rev_I.fm Page 52 Tuesday, September 13, 2005 8:46 AM