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Re: Beam Bracing

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In a message dated 4/18/00 3:35:51 PM Eastern Daylight Time, 
tlarsen(--nospam--at) writes:

> What is everyone using for the needed capacity of compression flange bracing
>  (against Lateral Torsional Buckling)  on steel beams?  ie: What force is
>  induced in the brace that needs to be resisted?  Is there an easy rule of
>  thumb?
>  Trevor
The standard for AISC/ASD has been mentioned already.  AISC also currently 
has a seminar called bracing for stability that covers this. In the seminar 
there are two aspects of bracing that are covered, the first is strength 
(which is what has always been used) and secondly stiffness, so it is not 
enough for the brace just to be strong enough but it must also be stiff 
enough.  In addition in the new LRFD that is coming out is going to cover 
lateral bracing and the associated equations and requirements.  In addition 
at the seminar I recall them stating that in the commentary they are going to 
give all the details in the equations so that by changing they factors they 
can be used for ASD.

-Bill King, EIT