57
I-800
APPENDIX B
Design Criteria for Combustible Concealed Installations Involving
Victaulic FireLock CPVC Sprinkler System Products and Tyco Fire
Products Model CC1 Combustible Concealed Sprinklers
System Type:
Light hazard, wet pipe systems
Area of Use:
Flat, concealed spaces of wood truss construction; flat,
concealed spaces of non-combustible bar joint construction; or non-
combustible, insulation-filled solid or composite wood joist construction.
NOTE:
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 it becomes wetted by the operation of a Model CC1 Combustible
Concealed Sprinkler during a fire.
Concealed Space Area:
The area of the concealed space is not limited;
however, draft curtains must be provided in 1,000 ft
2
areas. The draft cur-
tain must be at least
1
/
3
the depth of the wood truss or 8 inches, which-
ever is greater, and must be constructed of a material that will not allow
heat to escape through or above the draft curtain.
Concealed Space Depth:
36 inches maximum to 12 inches minimum
Minimum Distance Between Model CC1 Combustible Concealed
Sprinklers:
6 feet –
NOTE:
This minimum spacing does not apply to
additional sprinklers required for protection of CPVC products that are
offset over an obstruction.
Maximum Distance Between Model CC1 Combustible Concealed
Sprinklers Located Just Below Upper Deck:
10 feet
Maximum Sprinkler Coverage Area:
100 ft
2
Deflector Position for Wood Truss Construction or Bar Joist Con-
struction:
Upright and 1
1
/
2
to 4 inches below the upper deck
Deflector Position for Solid or Composite Wood Joist Construction:
Upright and 1
1
/
2
to 2 inches below the solid or composite wood joists
Minimum Distance Away from Trusses:
4
1
/
2
inches
Remote Area:
1,000 ft
2
–
NOTE:
This remote area does not include addi-
tional sprinklers required for protection of CPVC products that are offset
over an obstruction.
Required Density:
0.10 gpm/ft
2
Minimum Operating Pressure:
10 psi
Obstructions:
All NFPA obstruction criteria for standard spray sprinklers
apply
Additional Information:
• When Model CC1 Combustible Concealed Sprinklers are used in Vic-
taulic FireLock CPVC Sprinkler Systems, the bottom of horizontally run
pipe must not exceed 4 inches above the ceiling. The CPVC piping can
then be used to supply the Model CC1 Combustible Concealed Sprin-
klers as well as the sprinklers below the ceiling. All other instructions in
this design and installation manual must be referenced during system
installation.
I-800 2755 Rev_I.fm Page 57 Tuesday, September 13, 2005 8:46 AM
