[PSUBS-MAILIST] Wanted: Aluminum I-beam

[Jon Wallace via Personal_Submersibles]

Before I make a final decision, I have found a suitable i-beam for my application that is very reasonably priced.  The problem is that it is American Standard "S" shape which means the flanges taper toward the web.  Since I have to bolt it through the tapered flange to another member the nut will not sit flat against the flange.  Is this a problem and is there a fix to it?  beveled washer necessary?
Jon
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