Compression Flange Bracing????
Compression Flange Bracing????
(OP)
Let's say you have a 7" by 28" deep PSL beam spanning 30 ft. There are Pre-Engineered I-Joists bearing on top of the beam and the bottom of the beam is not currently restrained from lateral buckling.
Now let's say I determine the maximum allowable unbraced span length for the PSL beam for uplift, and decide I need to brace the bottom of the beam at the mid-span or the third points or whatever.
How do I determine how much force gets into these braces??? Does the bracing force depend on where you are along the beam (say max for a brace at mid-span) or is it assumed to be a constant force along the length of the beam.
Now let's say I determine the maximum allowable unbraced span length for the PSL beam for uplift, and decide I need to brace the bottom of the beam at the mid-span or the third points or whatever.
How do I determine how much force gets into these braces??? Does the bracing force depend on where you are along the beam (say max for a brace at mid-span) or is it assumed to be a constant force along the length of the beam.






RE: Compression Flange Bracing????
The bracing force is a function of the stress in the supported member. If my memory is correct a PSL beam is a solid rectangular shape, so I am not familiar with supporting wood with ASD, but if you are supporting a flange then approx 1% of the flange force is required to support the flange at the chosen location.
HTH
Regards
VOD
RE: Compression Flange Bracing????
RE: Compression Flange Bracing????
RE: Compression Flange Bracing????
I should have been a bit more specific.
Regards
VOD