Uniform load on bottom flange of composite beam with small ecc.
Uniform load on bottom flange of composite beam with small ecc.
(OP)
I'm checking a beam for a uniform load hanging from the bottom flange of a composite w18x30 beam with a 1.5" eccentricity. See sketch. My instincts say this load is not too much but I want to have calcs backing it up. The span is 38 feet and the beam is simply supported. I thought about adding stiffeners to the opposite side of the ecc. and check the bottom flange like it was a cantilevered beam. Any thoughts?
Clarke Engineering Services, PC
Jobsite Engineering and Consulting
www.anchorengineer.com






RE: Uniform load on bottom flange of composite beam with small ecc.
Clarke Engineering Services, PC
Jobsite Engineering and Consulting
www.anchorengineer.com
RE: Uniform load on bottom flange of composite beam with small ecc.
I doubt that you will need stiffeners for the 163#/' load because the web is likely adequate for that small moment. If you do use stiffeners, why on the opposite side? Put them on the same side as the eccentric load.
As far as calculations are concerned, M = 163*1.5 = 244"#. S = 12*t^2/6. f = M/S.
Same calc. for beam web but add tension of 163#/'.
Don't forget to check the effect on the composite studs as you will be adding a little tension to each one.
For the larger load over the 5' span, it might be a good idea to add stiffeners and possibly studs over a 5' or 6' length offset to the side of the load.
BA
RE: Uniform load on bottom flange of composite beam with small ecc.
Clarke Engineering Services, PC
Jobsite Engineering and Consulting
www.anchorengineer.com