IBC 1605.3.1 Exception 2 vs. ASCE 7
IBC 1605.3.1 Exception 2 vs. ASCE 7
(OP)
Can anyone provide an explanation why IBC 09/12 includes the exception that roof live loads less than 30 psf need not be combined with seismic loads, but ASCE 7-05 or -10 does not?





RE: IBC 1605.3.1 Exception 2 vs. ASCE 7
RE: IBC 1605.3.1 Exception 2 vs. ASCE 7
RE: IBC 1605.3.1 Exception 2 vs. ASCE 7
RE: IBC 1605.3.1 Exception 2 vs. ASCE 7
Now reading IBC 1605.3.1 Exception (2) - "Flat roof snow loads of 30 psf or less and roof live loads of 30 psf or less need not be combined with seismic loads. Where flat roof snow loads exceed 30 psf, 20 percent shall be combined with seismic loads".
So does this mean that ASCE 7 12.4.2.3(6) becomes (1.0 + 0.105*SDS)*D + H + F + 0.525*rho*QE + 0.75*L ?