D2.B.5 Section Classification
The AS 4100 specification allows inelastic deformation of section elements. Thus, local
buckling becomes an important criterion. Steel sections are classified as compact,
noncompact, or slender; depending upon their local buckling characteristics. This
classification is a function of the geometric properties of the section. The
design procedures are different depending on the section class. STAAD.Pro
determines the section classification for the standard shapes and user-specified shapes.
Design is performed for all three categories of section described above.