Fire Sprinklers Installed For Sloped Roof

Deflector orientation and or standoff distance.

Fire sprinklers installed for sloped roof.

Roof top sprinkler systems fact. In the face of an advancing wildfire a structure with a properly implemented firesmart program in combination with an operational exterior rooftop sprinkler system has a survival probability of above 90. Sprinklers are one of the oldest methods but one of the newest technologies in wildfire control and property fire protection in wildland areas. Sprinklers must be installed with the frame arms perpendicular to the roof slope.

Deflector parallel to the sloped roof above. These modified transport dynamics may increase the suppression challenge through increased fire size. Rooftop sprinklers are a proven method of improving the chances that a building will survive a wild fire according to various studies. Roofs having a pitch not exceeding 2.

Deploy on the roof of a structure and around the perimeter of a structure for complete fire protection coverage. When compared to standard spray sprinklers which have restricted nfpa 13 installation criteria within attic spaces. When rooftop sprinklers are activated they spray water high up in the air which lands on the roof trees and other surfaces that are within range. 50 foot diameter spray per sprinkler providing over 1200 sq ft of coverage per set.

For the 33 degree roof inclination equivalent to an 8 in 12 roof slope the water flux on top of the fire source is reduced by 50. 12 16 7 are considered horizontal and sprinklers shall be permitted to be installed with deflectors horizontal. However where sprinklers are installed in the peak below a sloped ceiling or roof surface the sprinkler shall be installed with the deflector horizontal. Centerline of sprinkler must be a minimum of 6 laterally from face of truss see figure 8.

The sloped ceiling may also alter sprinkler spray patterns depending on sprinkler installation details e g. Additionally as with all. Sidewall sprinklers are required to have the deflector aligned parallel to ceiling or roof slopes nfpa 13 2002 2016 editions section 8 7 4 2 and where the slope exceeds 2 in 12 the sprinkler must be located at the high point of the slope and be positioned downward nfpa 13 2002 2016 editions section 8 7 4 2 2. Must be offset at least one channel laterally from any ridgeline sprinkler.