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I want to determine the safe work load (SWL) capacity of a trestle in my workshop. It is a T Beam with width (W), height (h), thickness (t) and length (L). It is welded each end to two legs - what kind of support would this be considered as? Fixed or pin?

Can someone walk me through the calculations to find the SWL that it can endure.

I remember doing something similar in my structural analysis class but cannot find my notes, I believe i have to find the section modulas of the T beam, find allowable stress and find moment? I do not remember exactly the formulas.

There are also cleats 1/4 intervals along length (L), do I consider this in my calcs?

Thank you