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RE: ASD vs. LRFD

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> -----Original Message-----
> From: Roger Turk [mailto:73527.1356(--nospam--at)compuserve.com]
> Sent: Thursday, June 17, 1999 12:54 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: ASD vs. LRFD
> Let us also consider in the same situation that the service load
> DL and LL
> moments at that same point are both positive.  But, when we apply
> the load
> factor to the live load, the live load moment at that point
> becomes negative
> (entirely possible particularly for a continuous beam with the
> live load in
> an adjacent span), what do we do?  Do we just neglect the
> negative factored
> LL moment and use only the factored DL?  With ASD, we would
> consider the sum
> of the service load moments at that point because both were of the same
> sign.  Do we apply the load factors to the service load moments
> (or whatever
> we are considering), but that has caused me much consternation in
> designing
> concrete footings subject to overturning with partial uplift.

Why don't we quit saying what if and start putting some numbers to these
examples.

Brian K. Smith, P.E.