Effect of reinforcing on UL fire ratings
Effect of reinforcing on UL fire ratings
(OP)
A composite slab design for a hospital in California has been reinforced for diaphragm forces using #4 at 16 e/w. The UL design quoted (D916) called for 6x6/10x10 mesh. The design replaced the mesh with the rebar. The fire marshal says this design does not meet the UL requirement because the rebar is diferent than the mesh. Does anyone have a reputable source that adresses the effect of reinforcing on fire ratings?? UL is no help, they want to thicken the slab by the difference in reinforment diameters???






RE: Effect of reinforcing on UL fire ratings
Please see FAQ731-376 by VPL for tips on how to make the best use of Eng-Tips Fora.
RE: Effect of reinforcing on UL fire ratings
BUT, if it is a UL rating you MUST have, then you are stuck with meeting the EXACT requirements of the UL rating.
After some of the tragic fires around the country this summer, I can see why the Fire Marshal's are getting picky.