NFPA 13R and sprinklers in attics under IBC. 2

[SprinklerDesigner2]

Question about International Building Code (Georgia in particular)

NFPA 13R "Standard for the Installation of Sprinkler Systems in Residential Occupancies up to and Including Four Stories in Height" 2002 Edition Section 6.8.5 has to do with sprinklers in attics of apartment buildings and motels.

"Sprinklers shall not be required in attics[/b], penthouse equipment rooms, elevator machine rooms, concealed spaces dedicated exclusively to and containing only dwelling unit ventilation equipment, crawl spaces, floor/ceiling spaces, elevator shafts, and other concealed spaces that are not used or intended for living purposes or storage and do not contain fuel-fired equipment."

But regardless of what NFPA 13R allows doesn't the building code require sprinklers in combustible attics unless the walls around the dwelling units extend to the attic roof deck? The way I read it the IBC requires sprinklers in these attics unless they are compartmented into spaces not exceeding the area of two dwelling units or 3,000 sq. ft. whichever is less.

If this is right these walls have to be what? 30 minutes?

 

[stookeyfpe]

SD2:

The following are the applicable sections from the 2003 IBC and IFC for your 2-story Group R-2 occupancy:

903.3.1.2 NFPA 13R sprinkler systems. Where allowed in buildings of Group R, up to and including four stories in height, automatic sprinkler systems shall be installed throughout in accordance with NFPA 13R.

903.2.7 Group R. An automatic sprinkler system installed in accordance with Section 903.3 shall be provided throughout all buildings with a Group R fire area.