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Equal and unequal angles — inclined principal-axis buckling and direction-sensitive bending.
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Geometry

Steel Grade
Section
Principal X Length (mm)
Principal Y Length (mm)
LTB Length (mm)
Moment factor αm
Lx and Ly are effective lengths about the inclined principal axes; they are not rotations of local L22/L33.

Applied Design Actions

Axial N* (kN, − compression)
Moment M33* (kN·m) Moment M22* (kN·m)
Shear V2* (kN) Shear V3* (kN)
M33/M22 are resolved automatically onto the inclined principal x/y axes.
Global Capacity Ratio
Governing:
Design notes

Section Properties

Depth D (mm)Width B (mm)
tw (mm)tf (mm)
Area (mm²)Mass (kg/m)
fy (MPa)fu (MPa)
J (mm⁴)Iw (mm⁶)

Leg-Parallel n/p Axes

In (mm⁴)Ip (mm⁴)
Inp product (mm⁴)Principal angle α

Angle Form

kfφNs (kN)
Leg λDLeg λB
φNc governing (kN)φVv (kN)

Principal Axis X

Major principal axis, inclined by α from the angle leg-parallel axes.
Principal Properties
Ix (mm⁴)rx (mm)
Ze Load A (mm³)Ze Load C (mm³)

Resolved Design Action

Mx* principal (kN·m)
Load direction
Ze used (mm³)

Design Capacities

φNcx (kN)
φMsx (kN·m)
φMbx (kN·m)
Principal X bending utilisation

Compression Capacity

Principal Axis Y

Minor principal axis. Angle buckling normally becomes critical about this inclined axis.
Principal Properties
Iy (mm⁴)ry (mm)
Ze Load B (mm³)Ze Load D (mm³)

Resolved Design Action

My* principal (kN·m)
Load direction
Ze used (mm³)

Design Capacities

φNcy (kN)
φMsy (kN·m)
Principal Y bending utilisation

AS 4100 Utilisation

Axial
Section interaction
Member interaction

Compression Capacity

Steel calculation report

Report identification