For all sections:

• x-x is the axis parallel to the flanges (major axis)

• y-y is the axis perpendicular to the flanges (minor axis)

• for Single angles and Double angles

  • y-y parallel to long side (leg) - single angles

  • y-y parallel to long side (leg) - double angles with long leg back to back

  • y-y parallel to short side (leg) - double angles with short leg back to back

• u-u is the major principal axis for single angles

• v-v is the minor principal axis for single angles

Single angles - Section axes