Bulletin 044
December 2022
Page 5 of 9
www.reliablesprinkler.com
UPPER
DECK
CEILING
TOP CHORD DEPTH 4 in.
(100 mm) OR LESS
SEE NOTE 1
LOCATION OF STEEL PIPE
IN CONCEALED SPACE IS
NOT RESTRICTED
SEE NOTE 2
INSTALLATION NOTES:
1.
DISTANCE EVALUATED AS PART OF THE cULus LISTING: 12 in. TO 60 in. (300 mm TO 900 mm). NFPA 13 PERMITS INSTALLATION OF
THE SPRINKLER WHERE THIS DISTANCE IS LESS THAN 12 in. (300 mm).
2.
DEFLECTOR TO BE NO MORE THAN 2 in. (50 mm) MAXIMUM BELOW BOTTOM OF TOP CHORD. IN NO CASE SHALL DEFLECTOR BE
ABOVE THE BOTTOM OF THE TOP CHORD.
3.
INSTALL SPRINKLER WITH FRAME ARMS PARALLEL TO PIPE.
HYDRAULIC DESIGN AREA REQUIREMENTS
1.
WET OR DRY SYSTEM: WHERE DRAFT CURTAINS (OR FULL HEIGHT WALLS) ARE PROVIDED AT MAXIMUM AREAS OF 1000 ft
2
(93 m
2
)
OR LESS, CALCULATE ALL SPRINKLERS WITHIN THE COMPARTMENTED AREA.
2.
WET SYSTEM: WHERE DRAFT CURTAINS OR FULL HEIGHT WALLS ARE NOT PROVIDED, OR PROVIDED AT AREAS EXCEEDING 1000 ft
2
(93 m
2
), CALCULATE AN AREA OF 1000 ft
2
(93 m
2
) OR SIX SPRINKLERS, WHICHEVER CREATES THE GREATER DEMAND.
3.
DRY SYSTEM: WHERE DRAFT CURTAINS OR FULL HEIGHT WALLS ARE NOT PROVIDED, OR PROVIDED AT AREAS EXCEEDING 1000 ft
2
(93 M
2
), CALCULATE AN AREA OF 1000 ft
2
(93 m
2
) OR NINE SPRINKLERS, WHICHEVER CREATES THE GREATER DEMAND.
4-1/2 in. (114 mm) MINIMUM FROM
CENTERLINE OF SPRINKLER TO
FACE OF TOP CHORD OF WOOD
TRUSS OR BAR JOIST
NOTE 3
SPRINKLER SPACING AND COVERAGE AREA
A. 16 ft (4.9 m) MAXIMUM BETWEEN SPRINKLERS
B.
6 ft (1.8 m) MINIMUM BETWEEN SPRINKLERS
C.
256 ft
2
(23.8 m
2
) MAXIMUM COVERAGE AREA PER SPRINKLER
Figure 3
Unobstructed Wood Truss or Bar Joist, Steel Pipe
Draft Curtains: Optional
