TFP632
Page 4 of 8
1 in. (DN25) or larger pipe, a hanger
must be located at the truss nearest a
sprig for purposes of restraint. If using
3/4 in. (DN19) piping, all sprigs over 12
in. (305 mm) must be laterally braced
using methods described in the NFPA
standards.
Where the CPVC must be offset up
and over an obstruction and the pipe
exceeds the allowed horizontal posi-
tioning requirements specified above
as well as shown in Figures 2 and 3,
additional Model CC2 Sprinklers are to
be installed as shown in Figure 2 and
3 to protect the BLAZEMASTER CPVC
product.
A minimum lateral distance of 18 in.
(460 mm) must be maintained between
the CPVC pipe and heat pumps, fan
motors, and heat lamps.
Design Criteria,
Steel Pipe
CC2 Temperature Rating
(Steel Pipe)
175°F (79°C)
Area of Use (Steel Pipe)
Horizontal (slope not exceeding 2:12)
combustible concealed spaces of:
• Unobstructed wood truss construc-
tion or unobstructed bar joist con-
struction (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)
• Obstructed wood truss construction
(Ref. Figure 7)
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 CC2 Sprinklers
in the event of a fire.
Concealed Space Area (Steel Pipe)
The area of the concealed space is not
limited; however,
• for unobstructed wood truss con-
struction or concealed spaces of
non-combustible, unobstructed
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 that will not allow heat to
escape through or above the draft
curtain.
• for solid wood joist construction (Ref.
Figure 5) and obstructed wood truss
construction (Ref. Figure 7), blocking
must be provided in each upper deck
and ceiling joist channel at a max-
imum 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 construction material.
Draft curtains must protrude below
the joist a minimum of 6 in. (150
mm) or 1/3 the space, whichever is
greatest, and run parallel with the
joist spaced at 31 ft (9,4 m) width
maximum to limit the area to a max-
imum 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 unobstructed wood truss construc-
tion or concealed spaces of unob-
structed 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), solid wood or composite
wood joist construction filled with non-
combustible insulation (Ref. Figure 6),
or obstructed wood truss construction
(Ref. Figure 7), the maximum depth of
the concealed space is 54 inches from
bottom of upper deck to top of ceiling,
and the minimum depth is 6 inches
from the bottom of the upper deck
joists to the top of the ceiling joists.
System Type (Steel Pipe)
Light hazard, wet or dry pipe system
using steel pipe.
NOTES: Use of the 4.2K sprinklers in
dry pipe systems is permitted by section
8.3.4.3 of NFPA 13 (2007 edition) where
piping is corrosion resistant or internally
galvanized.
Minimum Distance Between Model
CC2 Sprinklers (Steel Pipe)
7 ft (2,1 m)
Maximum Distance Between Model
CC2 Sprinklers (Steel Pipe)
12 ft (3,7 m)
Maximum Coverage Area (Steel
Pipe)
144 ft² (13,4 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. (40-50 mm) below
solid wood joist (Ref. Figure 5) or top
chord of a wood truss that has a depth
greater than 4 inches
1-1/2 in. to 4 in. (40 to 100 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)
for wet or dry pipe systems.
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)
7 psi (0,48 bar)
NOTE: The minimum resulting flow for
the 4.2K is 11.1 gpm, and the minimum
resulting flow for the 5.6K is 14.8 gpm.
Therefore, for coverage areas less
than the maximum permitted coverage
area of 144 ft², the 4.2K may provide
a hydraulic advantage. The use of the
CC1 sprinkler having a K factor of 2.8,
minimum operating pressure of 10 psi,
and resulting minimum flow of 9.5 gpm
may provide a further hydraulic advan-
tage for yet smaller coverage areas
when designing wet pipe systems. The
CC1 is described in Technical Data
Sheet TFP630.
Obstructions (Steel Pipe)
See Figure 8 in this data sheet for
obstructions rules.
