RE: Flat bars and plates Hokie93 (Structural) 20 May 18 21:24 At any rate, thanks eng-tips for the tips. I wonder if F11 shouldn't make reference to table 3-18? Actually, I wish there was some discussion available as to why the F11 rectangular design spec design procedure doesn't directly result in the Table 3-18 values seems like it should. Best to understand the engineering behind both. Nobody will care, design by AISC table 3-18 or F11 if the support system is no good. I think since I can recreate the table I'll proceed with that (plastic moment makes sense). ![]() Please note, This was not an academic exercise as we're planning to support roughly $20M worth the equipment on the selected bar grid and I need/(would like) to understand every nuance of the associated calculation. The more conservative approach are the table 3-18 values and will use those. ![]() However, 0.9Fy is more than the double the 16ksi per the table notes you reference. ![]() In the 13th edition, I don't see the 0.9Fy provision you reference. I have the 13th edition and yes, 24ksi LRFD (16ksi ASD which I used).
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