Ibc Sprinkled Attics

Ofire rated ceilings create enclosed rafter spaces.

Ibc sprinkled attics.

In summary the changes require sprinklers in occupied attics and attics used for storage and a single sprinkler when fuel fired appliances are in stalled. The international building code ibc requires all buildings containing group r occupancies to have sprinklers throughout. In addition to the permissible omissions already listed for residential applications where nfpa 13 systems have been installed sprinklers can be omitted in nfpa 13r systems in attics penthouse equipment rooms elevator machine rooms concealed spaces dedicated to dwelling unit ventilation equipment and other concealed spaces that are not used or intended for living purposes or storage. The automatic sprinkler system shall be extended to provide protection throughout the attic space.

The biggest change is for pedestal or podium type buildings where the attic is over 55 feet from the lowest level of required fire department vehicle access. An air space of 1 between insulation and sheathing ventilating area shall 1 150 of the area of the space. Sprinklers allow the risers and laterals of standpipes not to be covered by fire resistive material. Fire alarm manual pull stations in sprinklered buildings are permitted to have 200 feet of travel distance between.

Where dry pipe sprinkler systems are installed in attics care must be taken that piping is properly pitched to allow drainage. Space within thermal envelopeenclosed attics and rafter spaces shall have cross ventilation for each separate space. Nfpa 13 requires that branch lines be pitched a minimum of 1 2 inch per 10 feet and that mains be pitched at least 1 4 inch per 10 feet. However the need for sprinklers specifically located in the concealed spaces of floors and roofs is dependent on the type of sprinkler system specified nfpa 13 or nfpa 13r and the use of fireblocking and draftstopping.

Group r 4 fire areas not more than 4 500 gross square feet and not containing more than 16 residents provided the building is equipped throughout with an approved fire alarm system that is interconnected and receives its primary power from the building wiring and a commercial power system. 905 4 1 nfpa 13 nfpa 13r nfpa 13d.