Allowable Stress
Allowable Stress
(OP)
Can someone explain to me how the allowable axial stress for a W shape column (being used as a support leg ~ 24" high) is determined? I have two differnt (or maybe the same?) ways, but am not sure which to use.
AISC has a table that depends on the value of (K1*L/r). There is a table for 36 and 50 ksi yield stress steel.
I have also seen the allowable stress defined as Fa = 0.6*Fy (Fy = yeild stress).
AISC has a table that depends on the value of (K1*L/r). There is a table for 36 and 50 ksi yield stress steel.
I have also seen the allowable stress defined as Fa = 0.6*Fy (Fy = yeild stress).





RE: Allowable Stress
When you deal with columns, you have no choice but to take slenderness kl/r into account in determining the Fa. So there is no two ways. AISC ASD cleary gives equations for Fa. When kl/r equals Cc you will see that equation ASD E2-1 will give you Fa =3/5Fy which is 0.6Fy
regs
IJR
RE: Allowable Stress
RE: Allowable Stress