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# Re: CFMS - Cold Formed Metal Studs in Wall With Sheathing on One Side Only

• To: <seaoc(--nospam--at)seaoc.org>
• Subject: Re: CFMS - Cold Formed Metal Studs in Wall With Sheathing on One Side Only
• From: "B D Pham" <bpham(--nospam--at)airmail.net>
• Date: Sun, 22 Feb 1998 21:59:05 -0600

```The U channel and the clip angle will act as lateral bracing for the weak
axis (y-y direction) and preventing the stud from twisting at midheight.  So
you should design the stud using

lx = L             Kx = 1
ly = L/2          Ky = 1
lt = L/2           Kt = 1

B D Pham
ITEC Steel, Inc.

-----Original Message-----
From: stan J <hawneng(--nospam--at)wac.com>
To: seaoc(--nospam--at)seaoc.org <seaoc(--nospam--at)seaoc.org>
Date: Friday, February 20, 1998 11:46 AM
Subject: CFMS - Cold Formed Metal Studs in Wall With Sheathing on One Side
Only

>I'm looking at a wall with metal C studs and
>sheathing on one side only.  At the bottom of the
>studs each flange is attached to the sill track.
>At the top of the studs each flange is attached to
>a track top plate.  At about mid height is a u
>channel that runs though the cut outs and is
>attached to the web of each stud via a clip
>angle.  The stud is a two span affair supported at
>ground, intermediate floor, and roof.
>
>I'm trying to evaluate the capacity of the stud to
>resist wind loads that put the flange without the
>sheathing into compression.
>
>I had thought of using
>    lx = L/2             Kx = 1
>    ly = very small   Ky = 1
>    lt = L/2              Kt = 1
>and then applying the typical formulas for
>allowable bending in cold formed C sections
>
>Dennis . . . anyone, am I on the right track (pun
>intended) or not.
>
>
>Thanks
>Stan Johnson, PE
>I'm singing in the rain, just sing . . .  :)))
>
>
>
>
>
>

```