Which R factor to use for a 1996 steel building
Which R factor to use for a 1996 steel building
(OP)
I was asked if a 6000 square foot, one story steel building could take the added weight of solar PV panels on the roof. I have the plans and am trying to decide if the current ICC code would be more relaxed for the seismic requirements than originally calculated. Can anyone shed light here? I usually work with wood frame construction.
The criteria are Seismic Design Catagory D
SDs = 1.00
SD1 = 0.6
Roof Dead Load = 14.6 psf
The building was originally designed with V = 0.183 W
It has a moment frame in the transverse direction and crossed 5/8" rods in the longitudinal direction.
What Response Modification Factor, R,would you use under current code? I'm hoping that the PV panels (4 psf) would not add undue seismic loading to the building.
Thanks---Peter
The criteria are Seismic Design Catagory D
SDs = 1.00
SD1 = 0.6
Roof Dead Load = 14.6 psf
The building was originally designed with V = 0.183 W
It has a moment frame in the transverse direction and crossed 5/8" rods in the longitudinal direction.
What Response Modification Factor, R,would you use under current code? I'm hoping that the PV panels (4 psf) would not add undue seismic loading to the building.
Thanks---Peter






RE: Which R factor to use for a 1996 steel building
Second: if the IEBC is not law, then you should use chapter 34 or 35, I can't remember which of the IBC (Labeled existing buidlings).
Third: don't worry about what R factor should be used, look at the mass. Generally if you increase the building or any components mass by more than 5%, you must evaluate those components per TODAY's building code.
What I would suggest doing, is once you break the threshold of analyzing the building per today's standard, you go to the architect/owner and tell them. It is often a deal breaker to have to seismically upgrade a building for some proposed modification.
RE: Which R factor to use for a 1996 steel building
Peter
RE: Which R factor to use for a 1996 steel building
RE: Which R factor to use for a 1996 steel building