Reliable DD56-6 Bulletin

Features
• Coverage for DD80 spans up to 70 ft (21 m) with one row
of sprinklers
• Coverage for DD80 spans up to 100 ft (30.5 m) with three
rows of sprinklers
• All models use a 212°F (100°C) temperature rated fusible-
link operating element
• 150 square foot per sprinkler protection using GP56 and
AH Series sprinklers
Product Description
Reliable Attic Sprinklers are cULus Listed Specific Application
sprinklers. The sprinklers are available for protection of
combustible and non-combustible light hazard concealed
spaces with roof/ceiling slopes of 4:12 to 8:12. Reliable
Attic Sprinklers are upright sprinklers listed for use on
wet-pipe or dry-pipe sprinkler systems. All Reliable Attic
sprinklers use a 212°F (100°C) temperature rated fusible-
link operating element that is Listed for installation where the
maximum ceiling temperature is up to 150°F (66°C). Table A
provides a summary of available Reliable Attic sprinklers.
Application
Reliable Attic Sprinklers are listed for installation in
accordance with this bulletin and NFPA 13, "Standard for the
Installation of Fire Sprinklers." The sprinklers are classified
as Special Sprinklers by NFPA 13, and are intended for
installation within combustible or noncombustible roof
structures, including those with wooden trusses. Coverage
area, spacing requirements, and design flow and pressure
for each sprinkler are provided in tables B-I on the individual
sprinkler data sheets in this bulletin. Example sprinkler
layouts and hydraulic design criteria are provided in Figures
9 through 25. Please note that the example sprinkler layouts
are intended as design aids only, and do not necessarily
Attic Sprinkler Summary
Sprinkler K-Factor
Model gpm/psi
1/2
(L/min/bar
1/2
DD56-6 5.6 (80)
DD56-27 5.6 (80)
DD80-6 8.0 (115)
DD80-27 8.0 (115)
DS56 5.6 (80)
GP56 5.6 (80)
AH42 4.2 (60)
AH56 5.6 (80)
Thread Size Max. Coverage Area
NPT or (Measured on Floor)
ISO7-1 ft x ft (m x m)
)
½ 6 x 40 (1.8 x 12)
½ 6 x 40 (1.8 x 12)
6 x 66 or 5 x 70
¾
(1.8 x 20 or 1.5 x 21)
6 x 66 or 5 x 70
¾
(1.8 x 20 or 1.5 x 21)
½ 6 x 40 (1.8 x 12)
½ 10 x 15 (3.0 x 4.6)
½ 10 x 15 (3.0 x 4.6)
½ 10 x 15 (3.0 x 4.6)
www.reliablesprinkler.com
Models DD56-6, DD56-27, DD80-6, DD80-27,
DS56, GP56, AH42, & AH56 Sprinklers
Specific Application Sprinklers for Attic Spaces
Model DD56
(Model DD80 similar)
Model GP56
reflect all possible construction methods. In some cases,
a combination of layouts may be required. The Authority
Having Jurisdiction should be consulted for situations
that are not specifically addressed within this bulletin.
Special Note Regarding Insulation
Noncombustible insulation, properly secured with wire
netting to prevent sagging onto sprinklers may be used at
the roof deck. Attic sprinklers have not been evaluated and
are not listed for use with spray foam insulation. Use of attic
sprinklers with spray foam insulation should be evaluated on
a case by case basis with the Authority Having Jurisdiction.
Roof Slope Design Criteria
4:12 to <6:12
6:12 to 8:12
4:12 to <6:12
6:12 to 8:12
4:12 to 8:12
4:12 to 8:12
4:12 to 8:12
4:12 to 8:12
Bulletin 056 February 2020
cULus Listed
Model DS56
Model AH56
(Model AH42 similar)
Table A
Sprinkler
Identification
Number (SIN)
Table B RA5624
Table C RA5694
Table D RA5622
Table E RA5692
Table F RA5625
Table G RA5695
Table H RA5623
Table I RA5626