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Re: Steel stud deflection track

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Drew,

I've never faced this problem myself; however, going to first principles, it might be possible to consider the top plate of the metal stud wall as a tension\compression strut connected to the building frame at the column to beam connection points where there are no relative vertical movements between the top plate and the track. The top plate would be designed as a short column (KL/r = small) since the track would restrain it horizontally and the studs would restrain it vertically. I don't know what type of connectors you would use; but they should be fairly conventional in nature.

       Just a thought from an old retired engineer.

Regards,

Daryl

----- Original Message ----- From: "Drew Morris" <dmorris(--nospam--at)bbfm.com>
To: <seaint-seaosc(--nospam--at)mail-list.com>
Sent: Wednesday, June 05, 2013 12:51 PM
Subject: [SEAINT-SEAOSC] Steel stud deflection track

I am working on a project that has a structural steel framework with steel stud walls. These walls are shear walls sheathed with plywood. The walls are aligned with the framing (not a bypass wall), so the top of the wall will slip into a deflection track. What I need is a deflection track/clip that allows vertical movement from live and snow loading but can transfer lateral forces from the diaphragms to the sheathed walls. Any recommendations out there?

--
*Drew Morris, PE*| /Project Engineer/
BBFM Engineers, Inc. <http://www.bbfm.com/>
510 L Street, Suite 200 | Anchorage, Alaska 99501
Ph: (907)274-2236 | Fax: (907)274-2520 | Web: www.bbfm.com

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