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Re: Truss bracing

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There is a paper that deals with this concept of bracing the compression
web members via the tension chord.  It's in the AISC Engineering Journal,
third quarter, 1983, pp. 103-106.  The autor was James M. Fisher.
Unfortunately, the methodology looks like it was grabbed from the air,
perhaps because a more thorough treatment becomes hopelessly complicated.
Even so, it may be useful to you.


>Mark,
>
> One important point to consider is the compression web members that are
attached to the tension chord.  These web members are normally designed as
pinned ended and K=1.0.  Unless the tension chord has the strength and
stiffness to provide the out-of-plane restraint required for the K=1.0
effective length factor, then bracing is to be provided for that function.
So in effect, one is not bracing the tension chord, but the compression web
members.
>
> Curt La Count
> Jacobs Engineering
> Portland, OR