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RE: x brace question

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The following papers seem to generally support use of 1/2 of the overall
brace length for at least non-seismic loadings:

"Effective Length Factor of the Design of X-bracing Systems", El-Tayem &
Goel, AISC Engineering Journal, 1st Quarter 1986

"Design of Diagonal Cross Bracings, Part 1: Theoretical Study", Picard &
Beaulieu, AISC Engineering Journal, 3rd Quarter 1987

"Design of Diagonal Cross Bracings, Part 2: Experimental Study", Picard
& Beaulieu, AISC Engineering Journal, 4th Quarter 1988

Also see Discussion on "Design of Diagonal Cross Bracings, Part 1:
Theoretical Study, Part 2: Experimental Study", Stoman, AISC Engineering
Journal, 4th Quarter 1989

Regards,
Ed Marshall, PE
Simons-Engineering
Atlanta

> -----Original Message-----
> From:	Tarek Mokhtar [SMTP:Tarek(--nospam--at)deltanet.com]
> Sent:	Wednesday, March 11, 1998 10:44 AM
> To:	seaoc(--nospam--at)seaoc.org
> Subject:	x brace question
> 
> For an ordinary x braced steel frame with tube steel braces
> can one assume the brace buckling length for in and out of plane
> to be 1/2 the actual brace length ?
> 
> Tarek Mokhtar
>