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Help for steel stress check design

Help for steel stress check design

Help for steel stress check design

(OP)
Hallo, sorry for my english, I write from Italy.
I would like to know: when I perform the check of the structure (i.e. a simple steel beam) I obtain a Total Ratio of 0,997 (= 0,000 + 0,997 + 0,000)
My bending moment is Mu33= -70,697Kip*in and (I do like this in Italy) if SMayor= 2,087 and Fy=50, I thing that  Resisting Bending Moment Mrd = 2,087*50= 104,35Kip*in
So that Mu33/Mrd = 70,697/104,35= 0,677 Mmayor ratio

Why sap2000 give me Mmayor ratio= 0,997 ???

thanks very much for help

RE: Help for steel stress check design

(OP)
well, sorry:

Mu33/Mrd = 70,697/104,35=0,677*0,9(phi)=0,610 Mmayor ratio
 but is always far away from 0,997 !

RE: Help for steel stress check design

you may want to check and make sure your design check is useing the same code or method that you are using by hand....factored loads vs. service loads

RE: Help for steel stress check design

could it be that when you check, you only consider moment about one specific direction? Perhaps the max ratio occurs at some other axes besides the principles

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