TFP630
Page 4 of 8
Design Criteria,
Steel Pipe
Area of Use (Steel Pipe)
Horizontal (slope not exceeding 2 in 12)
combustible concealed spaces of:
• wood truss construction or bar joist
construction (Ref. Figure 4)
• solid wood joist construction (Ref.
Figure 5) where the upper deck and
ceiling joists may have a maximum
depth of 12 in. (300 mm) and typical
on center joist spacing of minimum
16 in. (400 mm)
• non-combustible insulation filled
solid wood joist or wood composite
joist construction (Ref. Figure 6)
NOTE:
In order to be considered “non-
combustible insulation filled solid wood
joist or composite wood joist con-
struction”, the insulation (including
insulation provided with a combusti-
ble vapor barrier), must completely fill
the pockets between the joists to the
bottom of the joists, and the insulation
must be secured in place with metal
wire netting. The metal wire netting is
intended to hold the insulation in place
should the insulation become wetted
by the operation of the CC1 Sprinklers
in the event of a fire.
Concealed Space Area (Steel Pipe)
The area of the concealed space is not
limited; however:
• for wood truss construction or con-
cealed spaces of non-combustible
bar joist construction (Ref. Figure
4) draft-curtains or full height walls
must be provided at 1000 ft² (93 m²)
areas. This draft curtain shall be at
least 1/3 the depth of the concealed
space or 8 in. (200 mm), whichever
is greater, and be constructed using
a material which will not allow heat
to escape through or above the draft
curtain.
• for solid wood joist construction
(Ref. Figure 5), blocking must be pro-
vided in each upper deck and ceil-
ing joist channel at a maximum 32 ft
(9,75 m) intervals. This blocking
shall be installed to the full depth
of the joists and be installed so as
to not allow heat to escape through
or above the blocking. The blocking
must be constructed using a non-
combustible material or the joist con-
struction material.
Solid wall construction or draft cur-
tains must protrude below the joist
a minimum of 6 in. (150 mm) or
1/3 the space, whichever is small-
est and run laterally with the joist
spaced at 25 ft (7,6 m) width maxi-
mum to limit the area to a maximum
of 1000 ft² (93 m²). The draft curtain
may be constructed of 1/4 in.
(6,4 mm) plywood to prevent heat
from escaping beyond the area.
• For non-combustible insulation filled
solid wood joist or composite wood
joist construction (Ref. Figure 6),
the requirement for draft curtains or
blocking does not apply.
Concealed Space Size (Steel Pipe)
The minimum and maximum concealed
space depth is as follows:
For wood truss construction or con-
cealed spaces of non-combustible bar
joist construction (Ref. Figure 4) the
depth of the concealed space is 36 in.
(915 mm) maximum to 12 in. (305 mm)
minimum.
For solid wood joist construction (Ref.
Figure 5) or for non-combustible insu-
lation filled solid wood or composite
wood joist construction (Ref. Figure 6),
the maximum depth of the concealed
space is 54 in. (1372 mm) from bottom
of upper deck to top of ceiling, and the
minimum depth is 6 in. (150 mm) from
the bottom of the upper deck joists to
the top of the ceiling joists.
For obstructed wood truss construc-
tion (Ref. Figure 7), the maximum depth
of the concealed space is 54 in. (1372
mm) from bottom of upper deck to top
of ceiling, and the minimum depth is
6 in. (152 mm) from the bottom of the
upper chord to the top of the lower
chord.
System Type (Steel Pipe)
Light hazard, wet pipe system
Minimum Distance Between Model
CC1 Sprinklers (Steel Pipe)
6 ft (1,8 m)
Maximum Distance Between Model
CC1 Sprinklers (Steel Pipe)
10 ft (3,1 m)
Maximum Coverage Area
(Steel Pipe)
100 ft² (9,3 m²)
Deflector Position (Steel Pipe)
1-1/2 in. to 4 in. (40 to 100 mm) below
upper deck for wood truss construction
or concealed spaces of non-combusti-
ble bar joist construction (Ref. Figure 4)
1-1/2 in. to 2 in. (40 to 50 mm) below
solid wood joists (Ref. Figure 5)
1-1/2 in. to 2 in. (40 to 50 mm) below
non-combustible insulation filled solid
wood joists or composite wood joists
(Ref. Figure 6)
Remote Area (Steel Pipe)
The remote area for wood truss con-
struction or bar joist construction (Ref.
Figure 4) or solid wood joist construc-
tion (Ref. Figure 5) is 1000 ft² (93 m²).
The remote area for non-combusti-
ble insulation filled solid wood joist
or wood composite joist construction
(Ref. Figure 6) is to be calculated per
the requirements of NFPA 13.
Required Density (Steel Pipe)
0.10 gpm/ft² (4,1 mm/min)
Minimum Operating Pressure
(Steel Pipe)
10 psi (0,7 bar)
Obstructions (Steel Pipe)
All obstruction criteria per NFPA for
standard spray sprinklers apply (Ref.
Figure 8), unless modified by this tech-
nical data sheet.
