Section classification (Columns: AISC 360)

Tekla Structural Designer
2021
Tekla Structural Designer

Section classification (Columns: AISC 360)

Cross-section classification is determined using Table B4.1 (360-05), or Tables B4.1a+B4.1b (360-10 and 360-16).

At every cross section there are two classifications for each element in the section (flange or web) - one for axial compression and one for bending (flexure).

If axial compression does not exist (0kip or tension), the axial classification is NA. If bending is not present about both axes then the flexure classification is NA.

For axial compression the web and flanges are classified as either Compact or Slender (360-05), or as either Non-slender or Slender (360-10 and 360-16). The worst of the two is the resultant axial classification.

For bending both the web and flange are classified as Compact, Non compact or Slender and the worst of the two is the resultant flexural classification.

All unacceptable classifications are either failed in check mode or rejected in design mode.

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