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Re: Tension Only "X Bracing

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I believe the exception applies to hangars or warehouse type structures.  Single story, less than 35 feet tall, roof dead load < 20 psf...

On Thu, Jul 15, 2010 at 10:22 AM, Brian Bossley <bsbossley(--nospam--at)> wrote:

There are some exemptions for single story lightweight roof systems in ASCE 7 that allow you to disregard the seismic detailing provisions of AISC 340, even in SDC D.

On Jul 15, 2010 11:28 AM, "Jeff Hedman" <jeff_h(--nospam--at)> wrote:

If tension only braced frames are now prohibited, why do all the pre-engineered metal buildings provide tension only rod bracing in the longitudinal direction?  In my area we are typically in seismic design category D.  Just curious how they would be getting around this.  I am not at the office, so I haven’t been able to look in the AISC 340-05 yet.


Jeff Hedman

David Topete, SE