property-spec = AX D WF TF IZ IY IX AY AZ

AX

Cross section area

D

Depth of the section

WF

Section width

TF

Tube wall thickness

IZ

Moment of inertia about local z-axis (usually strong axis)

IY

Moment of inertia about local y-axis

IX

Torsional constant

AY

Shear area in local y-axis. If zero, shear deformation is ignored in the analysis.

AZ

Shear area in local z-axis. If zero, shear deformation is ignored in the analysis.