The 1” to 6” with the maximum of 22” requirements have been with us since they
introduced the obstructed construction concept in the 1991 edition of NFPA 13.
Prior to that, the requirement for beam and girder construction was for
sprinklers under beams to be 1” to 4” with a maximum of 20”.
Bes
I have existing sprinklers under concrete pan (obstructed) construction that
are located 22” below the deck. My concern is that the “beams” are 10” deep.
That means the deflectors are not within 1-6” of the bottom of the structural
member. Am I not applying the correct arrangement from NFPA 1
You can suggest that the owner of the building, or the tire storage tenant
install a lay in ceiling at 30’ above the floor. The ceiling tile material will
need to be either ½” gyp board tiles or clipped in place acoustic tile to
resist uplift. As for the on floor vs on pallets on the floor, seem
I have a design build warehouse we are looking at for tire storage.
Unfortunatly, the tire storage arraignment is not listed in the CMSA or
ESFR tables, and only partly addressed in the Control Mode Density / Area
Table.
The proposed storage arrangement is 15' high on side on floor under a 40'
high
