Slenderness ratio of braces are automatically checked and reported by programme.


Symbols

Lc = effective length of brace = KL, in. (mm)
r = governing radius of gyration, in. (mm)


Braces must have a slenderness ratio of KL / r ≤ 200. In braced frame systems, this condition must be fullfiled under the axial compression or tension force of the cross section in order to plasticize the structure to absorb necessary amount energy.

The brace effective net area must not be less than the brace gross area. The required strength of bracing members with respect to the limit state of tensile rupture on the net section is the expected brace strength.