Tyco BB Series - Page 15

TFP610
Page 15 of 28
When a BB Sprinkler is 36 inches (914,4 mm) or greater
above the space, and 36 inches (914,4 mm) or greater
clearance above the space is present, additional sprinklers
are not needed.
When a BB Sprinkler is a 36 inches (914,4 mm) or greater
above the space, and a 12 to 36 inches (304,8 mm to 914,4
mm) clearance above the space is present, Intermediate
Level Standard Sprinklers are to be installed to protect the
obstructed area.
Otherwise, the area beyond the mechanical space is to be
protected as shown by installing Standard Spray Sprin-
klers as necessary — OR — by constructing a shear wall
and installing SD Sprinklers.
Note: In all cases, the mechanical space or similar compart-
mented space is to be sprinklered per its respective hazard
rating and separated from the light hazard attic space by
construction that has a fire resistance rating based on the
water supply duration required for the hazard rating within
the mechanical space or similar compartmented space.
When a BB Sprinkler can be installed below or between
stiffeners and maintain the 16 to 22 inch (404,4 to 558,8
mm) distance to the peak, as well as the “V” and “H” clear-
ance to the stiffeners, additional sprinklers are not required.
When the stiffeners are located a minimum of 12 inches
(304,8 mm) below the BB Sprinkler, the stiffeners are 7-1/2
inches (190,5 mm) maximum in width, the openings are 12
inches (304,8 mm) minimum, and there is 70% minimum
open area, additional sprinklers are not required.
Otherwise, additional sprinklers are required as shown.
-OR-
36" (914,4 mm)
OR GREATER
4" (101,6 mm) TO
6" (152,4 mm) TYP.
ADD SHEAR WALL AND
PROTECT WITH SINGLE
DIRECTIONAL SPRINKLERS
MECHANICAL
SPACE
PROTECT WITH
STANDARD SPRAY
SPRINKLERS
MECHANICAL SPACE
LESS THAN
12" (304,8 mm)
12" (304,8 mm) TO
36" (914,4 mm)
BB ATTIC
SPRINKLER
4" (101,6 mm) TO
6" (152,4 mm) TYP.
BB ATTIC
SPRINKLER
36" (914,4 mm)
OR GREATER
NO
ADDITIONAL
SPRINKLERS
REQUIRED
BB ATTIC
SPRINKLER
36" (914,4 mm)
OR GREATER
STANDARD
SPRAY SPRINKLER
STANDARD
SPRAY SPRINKLER
STANDARD
SPRAY SPRINKLER
MECHANICAL
SPACE
INTERMEDIATE
LEVEL
STANDARD SPRAY
SPRINKLER
BB ATTIC
SPRINKLER
22" (558,8 mm) MAX.
16" (406,4 mm) MIN.
BB ATTIC
SPRINKLER
70% MINIMUM
OPEN AREA
7-1/2" MAX.
(190,5 mm)
12" MIN.
(304,8 mm)
LESS THAN
70% OPEN AREA,
OPENINGS LESS THAN
12" (304,8 mm) WIDE,
OR STIFFENERS
GREATER THAN
7-1/2" (190,5 mm)
WIDE
SINGLE
DIRECTIONAL
SPRINKLER
INSTALL
DRAFT CURTAIN
OR FULL WALL
INTERMEDIATE
LEVEL
STANDARD
SPRINKLER
SINGLE
DIRECTIONAL
SPRINKLER
BB ATTIC
SPRINKLER OR
STANDARD SPRAY
SPRINKLER
STIFFENERS
STIFFENERS
12" MIN.
(304,8 mm)
3-1/2" MIN.
(88,9 mm)
AIR SPACE
"V"
BOTTOM
PLANE OF
STIFFENERS
TOP OF
DEFLECTOR
"V"
"H"
BB1
0"
V + 15"
0"
H
BB2
V + 10"
0"
BB3
V + 8"V > 0"
0"
V
FIGURE 16 (2 OF 2)
OBSTRUCTIONS TO WATER DISTRIBUTION — BB, SD & HIP
(Obstructions to Water Distribution for Attic Sprinklers Differ from Standard Sprinklers as Shown)
Figure 16F
Area Outside of Mechanical Space
or Similar Compartmental Space
Figure 16G
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