When carrying out code checks to AS/NZS4600, Steel Designer uses the following clauses of to check your structure. No other checks are performed unless they are specifically listed below.

AS/NZS 4600:  "Australian/New Zealand Standard AS/NZS4600-2005: Cold-formed Steel Structures", Standards Australia, 30 December, 2005.

Clauses used are 3.1~3.5.

The design checking procedure is as follows;

The design actions are calculated through the first order analyses and a second order analysis should be used for sway frames.

For major and minor bending section checks, the design bending moment is checked to be less than the nominal section moment design capacity as found using clause 3.3.2.

For bending member checks, the design bending moment about the major principle axis is checked to be less than the nominal member moment design capacity as found using clause 3.3.3. For some section shapes, the bending of distortional buckling check may not be included: clause 3.3.3.3.

For major and minor shear checks, the design shear force is checked to be less than the nominal shear capacity found from section 3.3.4.

For tension checks, the design axial tension force is checked to be less than the nominal section design capacity in tension as computed using clause 3.2.

For compression section checks, the design axial compressive force is checked to be less than the nominal section design capacity in compression as computed using clause 3.4.1.

For major and minor compression member checks, the design axial compressive force is checked to be less than the nominal member design capacity in compression as computed using clause 3.4.2~3.4.5.

For all combined action section checks, the design axial force (N*) is the maximum axial force in the member, and the design bending moments (Mx*, and My*) are the maximum bending moments in the member.

For major and minor combined section checks, the design bending moment is checked to be less than the nominal section moment design capacity reduced by axial force (compression or tension) as computed using clause 3.5.1.