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Re: Exit facilities in wood

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Some one is going to get pissed if a fire drill causes wall cracking.
Exits are not only overloaded because of traffic but movers tend to stck up
halls. Still... it sounds like short term!
David Merrick, SE
mrkgp(--nospam--at)pacbell.net

Eric Lehmkuhl wrote:

> Regarding the design of wood beams for the exit live load of 100 psf, any
> comments on the following approach?:
>
> - Strength : check beam for 100 psf live load and a load duration factor of
> 1.25 (seven days        duration).  This should be conservative as an
> emergency exit load is of very short duration.
> - Serviceability : check beam for 60 psf live load (this is a cantilevered
> walkway).  Who really cares what the deflection is in an emergency as long
> as everything holds up?
>
> Eric Lehmkuhl,  S.E.
> KPFF Consulting Engineers, San Diego
> (619) 521 8500 phone
> (619) 521 8591 fax
> eric_lehmkuhl(--nospam--at)kpff.com
>
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