TFP633
Page 4 of 8
all other guidelines of the “BLAZEMAS-
TER — Installation Instructions & Tech-
nical Manual” must be met. When using
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 inches (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 Figure 2 and 3,
additional Model CC3 Sprinklers are
to be installed as shown in Figures 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
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. See Figure 4.
• Solid wood joist construction (see
Figure 5) where the upper deck and
ceiling joists may have a maximum
depth of 12 inches (300 mm) and
typical on center joist spacing of
minimum 16 inches (400 mm).
• Non-combustible insulation-filled
solid wood joist or wood composite
joist construction. See Figure 6.
• Obstructed wood truss construction.
See Figure 7.
NOTE: In order to be considered “non-
combustible insulation-filled solid
wood joist or composite wood joist
construction”, the insulation (includ-
ing insulation provided with a combus-
tible 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 Model CC3
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 (see Figure 4) draft
curtains or full height walls must be
provided at 1000 ft² (93 m²) areas.
In addition, the 5.6K sprinkler is UL
Listed for a 2000 ft² (186 m²) draft
curtain area for solid wood open
truss construction on edge or on
face.
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 mate-
rial that will not allow heat to escape
through or above the draft curtain.
• For solid wood joist construction
(see Figure 5) and obstructed wood
truss construction (see Figure 7):
Blocking must be provided in each
upper deck and ceiling joist channel
at a maximum 32 ft (9,75 m) inter-
vals. 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 block-
ing. The blocking must be con-
structed using a non-combustible
material or the joist construction
material.
Draft curtains must protrude below
the joist a minimum of 6 inches (150
mm) or 1/3 the depth of the con-
cealed space, whichever is greater,
and run parallel with the joist spaced
at 31 ft (9,4 m) width maximum to
limit the area to a maximum of
1000 ft² (93 m²). For information
about antifreeze compatibility and
approved constructions, see the
Technical Data section.
The draft curtains are to be con-
structed using a material that will
not allow heat to escape through or
above the draft curtain.
• For non-combustible, insulation-filled
solid wood joist or composite wood
joist construction (see Figure 6), the
requirement for draft curtains and
blocking does not apply.
• For information about antifreeze
compatibility and approved con-
figurations, see the Technical Data
section.
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 (see
Figure 4) the maximum depth of the
concealed space is 60 in. (1524 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
chords to the top of the lower chords.
For solid wood joist construction
(see Figure 5) and solid wood or com-
posite wood joist construction the
maximum depth of the concealed
space is 84 in. (2134 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 deck joists to
the top of the ceiling joists. If joist con-
struction is filled with non-combustible
insulation the maximum height of the
space is 84 in. (2134 mm). See Figure 6.
For obstructed wood truss construc-
tion (see Figure 7), the maximum
depth of the concealed space is
84 in. (2134 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 or dry pipe system
NOTES: Use of the 4.2K sprinklers in
dry pipe systems is permitted by section
8.3.4.4 of NFPA 13 (2013 edition) where
piping is corrosion resistant or internally
galvanized.
Maximum Distance Between Model
CC3 Sprinklers (Steel Pipe)
TY2199 4.2K. . . . . . . . . . . . . . 14 ft (4,3 m)
TY3199 5.6K. . . . . . . . . . . . . . 16 ft (4,9 m)
Maximum Coverage Area (Steel
Pipe)
TY2199 4.2K. . . . . . . . . . . 196 ft² (18,2 m²)
TY3199 5.6K. . . . . . . . . . . 256 ft² (23,8 m²)
Minimum Distance Between Model
CC3 Sprinklers (Steel Pipe)
Minimum sprinkler spacing is 7 ft
( 2,1 m )
Deflector Position (Steel Pipe)
1-1/2 in. to 4 in. (40 mm to 100 mm)
below upper deck for wood truss con-
struction or concealed spaces of non-
combustible bar joist construction. See
Figure 4.
1-1/2 in. to 2 in. (40 to 50 mm) below
solid wood joist (see Figure 5) or top
chord of a wood truss that has a depth
greater than 4 in. See Figure 7.
1-1/2 in. to 4 in. (40 to 100 mm) below
non-combustible insulation-filled solid
wood joists or composite wood joists.
See Figure 6.
Remote Area (Steel Pipe)
The remote area for wood truss con-
struction or bar joist construction
(see Figure 4), solid wood joist con-
struction (see Figure 5), or obstructed
wood truss construction (see Figure 7)
is 1000 ft² (93 m²) for wet pipe or dry
pipe systems.
The remote area for non-combusti-
ble insulation-filled solid wood joist
or wood composite joist construction
(see Figure 6) without draft curtains is
to be calculated per the requirements
of NFPA 13.
