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Re: LGSS (Light Gauge Steel Studs) Need design example -Reply

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Of course you are correct Tim but, unfortunately, if we base our design on
a manufacturer's catalog, invariably the contractor will want to make a
substitution. Based on my experience, the flange width and lip width vary
tremendously depending on manufacturer.

Also, I would caution those who totally rely on manufacturer's data for
allowable load. What happens if/when it fails? Is the SER going to put
his/her whole practice in the hands of a manufacturer's catalog? I
recommend that the engineer do some independent calculations if for no
other reason than to validate a comfort level with the catalog data.

The AISI design manual has a lot of clear detailed examples to assist the
engineer in preparing these calculations. After doing a few by hand, the
engineer could easily set up either a spreadsheet or Mathcad template to
reduce the calculation time. If the SER is not willing to go through this
effort, he/she IMHO should not be specifying a material he/she is not

Bill Allen

> From: Tim McCormick <TMCCORMI(--nospam--at)BAS.CI.LA.CA.US>
> To: seaoc(--nospam--at)
> Subject: LGSS (Light Gauge Steel Studs) Need design example -Reply
> Date: Tuesday, February 24, 1998 8:43 AM
> Dennis,
> To go through the lengthy calculations for compression loads on the
> shear wall boundary member, you will need to know the section
> properties for the steel stud. These properties vary from manufacturer to
> manufacturer. For this reason, most manufacturers provide design 
> tables for allowable loads. Do you want to verify their information?  One
> way or the other, (section properties or tables), we seem to rely on the
> manufacturer's data.
> Tim McCormick, P.E.
> City o Los Angeles