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D14.C.6.3 Flexural Buckling - Axial Compression

Per section 13.3.1, the factored axial compressive resistance, Cr , of doubly symmetric sections conforming to the requirements of clause 11 for class 1, 2, or 3 sections shall be taken as:

Cr = ϕAfy(1+λ2n)-1/n

1.34 for hot-rolled, fabricated structural sections, and hollow structural sections manufactured according to SANS 657-1
= k l r f π 2 E = f f e

Doubly symmetric sections which may be governed by torsional-flexural buckling shall also meet the requirements of 13.3.2.

The parameters KY, LY, KZ, and LZ are applicable for this.