Are the stairs and risers combustible?
At 02:41 PM 5/23/2007, you wrote:
To all:
I am doing a Project 4 Story Residential building witch is designed per NFPA
13 and it is being built with Type V Construction. The Stairs are being
sheet rock w/ 1 layer of 5/8" GWB underneath all landings, and all walls in
the stair. It does state in NFPA 13 8.14.3, Combustible Construction.
Sprinklers shall be installed beneath all stairway of combustible
construction.
(1) Does putting 5/8" GYB Sheet rock underneath the landing makes this a Non
combustible stair?
(2) If this is considered a combustible stair do we have to put sprinklers
underneath all landings, not just underneath the entry on each floor,
including underneath the intermediate landing between the floors
Thanks
Shawn Fenneran
CET#105218
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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