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Re: OMF's using joist-girders

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Your approach seems reasonable, but I suggest you review the latest Technical
Digest published by the Steel Joist Institute:  "Design of Joist-Girder
Frames".   I just got my copy, and haven't had a
chance to review it yet, but it might be helpful.


Jim Bailey wrote:

> Has anyone out there done any OMF's lately using joist-girders? This is a
> one-story building in Zone 3 with 16' clear and 4' joist-girders. The design
> data we have on this topic is more than 10 years old.
> As far as I've been able to find out, nothing significant has changed since
> our office did one of these about 15 years ago. The girder is designed for
> full gravity loads as a simple span member, designed for live load moment at
> the support as a fixed end member, and designed for full live load plus
> seismic load moment at the support with 1/3 increase.
> Of course, the building must meet drift requirements and the top chord at
> the column has to be carefully detailed to transfer shear forces through the
> bearing connection.
> Jim Bailey