Bulletin 056
Page 8 of 24
December 2016
www.reliablesprinkler.com
Application
Reliable Attic Sprinklers are cULus Specific Application
sprinklers intended for installation in accordance with this
Bulletin and NFPA 13. The sprinklers are classified as
Special Sprinklers by NFPA 13.
The sprinklers are intended for installation within combus-
tible or noncombustible roof structures, including those
with wood joists or trusses.
Coverage area and spacing requirements for each sprin-
kler are provided on the individual sprinkler data sheets in
this Bulletin. Example sprinkler layouts are illustrated in
Figures 7 through 21. Design criteria for Reliable Attic
Sprinklers must be in accordance with Table H based on
the minimum flows and pressures for each sprinkler in Ta-
bles B through G. Provide additional sprinklers beyond
obstructions where required by Figure 22.
For example, hydraulic calculations for a sprinkler system
using DD Series sprinklers at the ridge with Model GP56
sprinklers at the eave must include the hydraulically most
remote 5 DD Series sprinklers plus 2 Model GP56 sprin-
klers for a wet pipe sprinkler system or 7 DD Series sprin-
klers plus 2 Model GP56 sprinklers for a dry pipe sprinkler
system.
