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# Re: Wind uplift on Roof

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Wind uplift on Roof
• From: Tripp Howard <tripphoward(--nospam--at)yahoo.com>
• Date: Fri, 30 May 2003 05:37:12 -0700 (PDT)

```For roof pressures, use the equation in Table 6-1 with Cf from
Table 6-6 "Monoslope Roofs over Open Buildings"

Tripp

--- richard lewis <rlewistx(--nospam--at)juno.com> wrote:
>         I am designing an open structure using ASCE 7-95.  It
> has clear
> span rigid frames.  Table 6-1 of ASCE 7-95 has an equation for
> calculating wind for an open structure, however it is for the
> horizontal
> force only.  How do I calculate the uplift force on the roof
> for the
> rigid frame?  I have a 1:12 roof slope on a 50 ft. span so the
> vertical
> projected area for the horizontal force is small.  I know I
> must have a
> big uplift force but I'm not sure of where the numbers are
> generated.
>
>
> Rich
>
>
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=====
Tripp Howard

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