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Re: Wood Rafters, UBC tables

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But isn't gypboard/drywall also considered a brittle material requiring the l/360 criteria??

Lew Midlam, PE
http://www.lcm.com
===============================

Tom Chiu wrote:

> Szuchuan Chang wrote:
> >
>
> > Old code told us the low slope rafters are designed for 1/360, 1/240
> > limits
> > (plaster & drywall ceiling) and the high slope rafters are designed for
> > 1/180 limit.  The new code just list 1/240 and 1/180 and no mention
> > about
> > how to apply them.
> _______________________________________________________________________
>
> I don't think plaster ceiling is being used nowaday in new construction,
> that's probably why l/360 is not applicable in new Code.
>
> >
> > Am I the only person that find the old tables (pre-94 UBC) are a lot
> > more
> > useful?
> ________________________________________________________________________
>
> You are not alone, I still use the old book.
>
>   ------------------------------------------------------------------------------------------------
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>   Tom Chiu <Tomchiu(--nospam--at)worldnet.att.net>
>   Principal, SE
>   Thomas Engineering
>
>   Tom Chiu
>   Principal, SE       <Tomchiu(--nospam--at)worldnet.att.net>
>   Thomas Engineering
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