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# Re: Roof height for A-Frame

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Roof height for A-Frame
• From: "William Haynes" <gtg740p(--nospam--at)gmail.com>
• Date: Tue, 11 Nov 2008 12:26:47 -0500

```My first impression is the same as what Gordon states.

Will H

On Tue, Nov 11, 2008 at 10:57 AM, Gordon Goodell
<GordonGoodell(--nospam--at)harmonydesigninc.com> wrote:
> David,
>
>
>
> Are you taking roof height for wind or seismic?  For wind it would be the
> average height, ½ way between eave and ridge.  For seismic, roof height is
> where the diaphragm attaches, so at the plate, top of your pony walls.  And
> it's a stretch to call this a single storey...You've got a roof diaphragm
> and an upper floor diaphragm, even though for equivalent lateral force
> procedure your h values for each level are only separated by 18".
>
>
>
>
>
> regards,
>
> Gordon Goodell
>
>
>
>
>
> From: David Topete [mailto:d.topete73(--nospam--at)gmail.com]
> Sent: Monday, November 10, 2008 6:55 PM
> To: SEAINT
> Subject: Roof height for A-Frame
>
>
>
> Where would the "roof height" be defined for a "single-story" structure with
> enough volume below the roof (12:12 pitch) that creates a second floor?  The
> gable ends extend to the roof ridge, while the rafters bear on a pony wall
> +18" above the second floor.  The second floor is 11'-0" above the ground
> floor.  Any thoughts would be much appreciated.  TIA.
>
> --
> David Topete, SE
>
> ExchangeDefender Message Security: Check Authenticity
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```