] [Thread] [Date] [Author]

["George Richards P.E." <george(--nospam--at)borm.com>]

Fellow Engineers:

I am reviewing the impact the IBC will have on how we design out West.

Using 1997 UBC Alternate Basic Load Combination 1612.3.2 we are allowed a
1/3 stress increase for wind or seismic only loading regardless of if the
material is wood, steel, or concrete.

Using 2000 Alternate Basic Load Combination 1605.3.2 we are NO LONGER
allowed a 1/3 stress increase for wind or seismic only unless specifically
given in the material section.  This means wood only.

First question:  Did I read this correctly?

Second question, {mostly for those of you in Texas where I know that every
home is Engineered :)} where the IBC has been adopted are you still using
Simpson numbers or since they have also included a 1/3 increase on steel are
you down grading them?

Thanks in advance.

George Richards, P. E.

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