Simply Supported I beam stability bracing
Simply Supported I beam stability bracing
(OP)
Part 2, p 2-13 in the AISC manual talks about stability bracing for ends of simply supported beams sitting on bearing plates.
I am going to be adding stiffeners to the beam to act as lateral bracing, but the code doesn't seem to give any guidance on the thickness/width of the stiffener.
Am I missing something? The load is relatively light so even if I designed the stiffeners to take all of the load they're still going to be pretty small.
I am going to be adding stiffeners to the beam to act as lateral bracing, but the code doesn't seem to give any guidance on the thickness/width of the stiffener.
Am I missing something? The load is relatively light so even if I designed the stiffeners to take all of the load they're still going to be pretty small.






RE: Simply Supported I beam stability bracing
This is usually done by transverse beams or walls at the supports or intermediate along the beams length, to include any floor and roof diaphragm connections to the top flange of the beam that may be present.
Mike McCann
MMC Engineering
RE: Simply Supported I beam stability bracing
RE: Simply Supported I beam stability bracing
Mike McCann
MMC Engineering
RE: Simply Supported I beam stability bracing
What is the Lb for beam? The distance between two brace points.
What is the Lb for a beam that has no brace points (ie a beam that sits of bearing plates)?
You need to laterally stiffen the section by providing lateral stiffness at the ends. One such way is a stiffener plate.
Even if the section has sufficient strength for the concentrated load failure modes, like web crippling, stiffeners have to be provided.
My question is I can size the stiffeners for strength, but what are the stiffness requirements?
RE: Simply Supported I beam stability bracing