Material Allowable Stress Limit
Material Allowable Stress Limit
(OP)
First time poster
Sorry if this seems a really simple question but....
I am doing some steel design and have used a maximum stress limit of 0.67*yield strength as my limit tensile and 0.4*yield as my shear limit. My client has come back asking where i get 0.67 and 0.4 from and has suggested 0.6 from AISC code. I do not have this AISC code and would like to continue with my 0.67 and 0.4 factors.
My question is can anyone tell me which standard these factors come from i.e ANSI or ASME standard or other. I cannot for the life of me recall as i have used them forever never referencing them and never had anyone query it as it always seemed a universal set of factors.
Much obliged for your assistance
Sorry if this seems a really simple question but....
I am doing some steel design and have used a maximum stress limit of 0.67*yield strength as my limit tensile and 0.4*yield as my shear limit. My client has come back asking where i get 0.67 and 0.4 from and has suggested 0.6 from AISC code. I do not have this AISC code and would like to continue with my 0.67 and 0.4 factors.
My question is can anyone tell me which standard these factors come from i.e ANSI or ASME standard or other. I cannot for the life of me recall as i have used them forever never referencing them and never had anyone query it as it always seemed a universal set of factors.
Much obliged for your assistance





RE: Material Allowable Stress Limit
If you're actually designing anything that falls under the AISC code, I highly recommend that you have a copy. It is important to know the limitations on where those stresses are used, as well as the stress values themselves. The members in question have to fall within certain width/thickness/height ratios, have lateral supports at certain intervals, etc.
These are understood to be for static loading of ductile members, and do not include fatique effects.
RE: Material Allowable Stress Limit
DowneastTech
Mechanical Engineer
Magnus R & D, Cypress, TX