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RE: DQoD: "Lateral Torsional Support from Gypsum Board"[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: DQoD: "Lateral Torsional Support from Gypsum Board"
- From: "Carter, Charlie" <carter(--nospam--at)aisc.org>
- Date: Tue, 17 Aug 2004 13:59:50 -0500
>Is it common to lend lateral torsional support
>via the use of gypsum board, such as ceiling
>drywall applied directly to the underside of the
Drywall does provide some restraint, though it is a brittle type of restraint. That is, the support is there as long as the fasteners are not loaded enough to fail the surrounding gypsum board in bearing.
There is probably a healthy stability contribution from the sheathing attached to what becomes the tension flange during the wind suction loading. This provides resistance to lateral-torsional buckling by torsional restraint of the cross section. How much will depend upon the diaphragm stiffness, connection of the sheathing to the beam, beam web stiffness, etc.
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