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Re: Roof Framing, Joist Spacing...Input please

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Have you calculated wind uplift as a concern. Since you are decreasing the
amount of joist, you will have less attachment of the steel deck to the
joist. Additional side lap fasteners in the deck should also be considered.

----- Original Message -----
From: Khosrownia, Ghassem SPK <GKhosrownia(--nospam--at)spk.usace.army.mil>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, July 20, 2000 9:12 AM
Subject: Roof Framing, Joist Spacing...Input please


> Hi,
>
> I have recently taken a radical approach in designing roof framing for
> several buildings that will be advertised in the same time frame. I am
> spacing the joists twice the usual 4 to 5 feet. Cleaner roof framing for
> these buildings was in general a driving factor for my approach. I have
had
> to specify the N type roof decking to support the extra span, and my
> architects don't mind the extra span's possible influence on the ceiling
of
> the building. Have I overlooked something? Except for the ceiling and
larger
> metal decking, what do you thing are the potential pitfalls of spacing
roof
> joists at 8 or 9 feet on centers. We have no snow load problems in this
> area.
>
> I appreciate your thoughts and the sharing of your experiences.
>
> Ghassem Khosrownia
>
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