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Re: 1997 UBC 2320.2 & 1605.2

[Subject Prev][Subject Next][Thread Prev][Thread Next] Scott:
Here in Southern California we use an exception to the UBC.
1999 SEA California    Recommended Lateral Force Requirements and Commentary

Sec 105.4.4 Combinations Along the Same Axes

Exception: For light frame buildings in occupancy groups 4 & 5 and of two stories or less in height, the lateral force resisting elements are permitted to be designed using the least value of R for the different structural systems found on each independent line of resistance.  The value of R used for the design of diaphragms for a given direction of loading in such structures shall not be greater than the least value used for any of the systems in that same direction.

Joe Venuti

Johnson & Nielsen Associates
Palm Springs,  CA