NFPA 13R Dry Shadow

[skdesigner]

a designer I used to work for always told me that 13R allowed a small amount of floor area to be unprotected - a "dry shadow". 3 sq. ft is the number that I have in my head. Can't seem to find it in the code, though. It would be a big help with eliminating a sidewall or two on the job I'm doing now. does this ring a bell? and perhaps a code reference?

 

[TravisMack]

6.2.3.5.4* Small potentially blocked or shadowed floor areas
shall be permitted on a horizontal plane in compartments of
800 ft2 (74.3 m2) or less as long as all of the following conditions
are met:
(1) The maximum area of any single individual contiguous
shadowed floor area, regardless of geometric configuration,
shall not exceed 3 ft2 (0.28 m2).
(2) The maximum area summation of any number of individual
shadowed floor areas shall not exceed 12 ft2 (1.11 m2) per
compartment.
(3) The maximum total summation of shadowed floor areas
and allowances made by 6.2.3.3 shall not exceed 30 ft2
(2.79 m2) per dwelling unit.

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

 

[skdesigner]

excellent - right in front of my eyes all along.

Thanks Travis