# D1.B.1.1.3 Stress Due To Compression

Allowable compressive stress on the gross section of axially loaded compression members is calculated based on the formula E-1 in the AISC Code, when the largest effective slenderness ratio (Kl/r) is less than C_{c}
. If Kl/r exceeds C_{c}
, allowable compressive stress is decreased as per formula 1E2-2 of the Code.

${C}_{c}=\sqrt{\frac{2{\pi}^{2}E}{{F}_{y}}}$