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Re: Rolled Beam Header in Silo

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        You could try a hollow structural shape.
        If you can't make that work you could try a truss.  The hoop stresses in the shell should keep the node points from migrating very far laterally and the torsional loads in the webs and chords should be small or at least manageable.  The curvature in the members will, however, cause significant p*y moments in the members (y is the distance from any point on the element from a straight line joining the two end points).  It's a thought anyway; and I don't have any better ideas.
H. Daryl Richardson
----- Original Message -----
Sent: Thursday, April 27, 2006 3:42 PM
Subject: Rolled Beam Header in Silo

I would appreciate suggestions regarding the design of rolled beam headers for openings in steel silos.  The header will be a horizontally curved member that is loaded out of plane.  How does one accommodate the significant torsion that results from the curvature?


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