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Re: UBC Uplift

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It appears that a 0.90 factor is used now.   Section 1629.1, line 13,
states:  "Where Allowable Stress Design is used, the load combinations of
Section 1612.3 shall apply."  The "Basic Load Combinations", Section
1612.3.1 includes 0.9D +/- E/1.4.  The "Alternate basic load combinations"
did not include a similar combination in the first printing, however, I
believe equation 12-16-1 was added per the May 1998 Building Standards.
This equation is also 0.9D + E/1.4.

Ed Haninger
Fluor Daniel

Tom.Hunt(--nospam--at) on 10/20/2000 10:10:08 AM

Please respond to seaint(--nospam--at)

To:   SEAINT(--nospam--at)

Subject:  UBC Uplift

In the 1994 UBC section 1631.1 there was a requirement which reads "For
materials which use working stress procedures, dead loads shall be
multiplied by 0.85 when used to reduce uplift".  I do not see this
requirement in the 1997 UBC.  Does anyone know if this requirement was
completely deleted or perhaps moved to some other mysterious section??

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