Normal units are in parenthesis
  • D=depth of section (mm)
  • f1=flange width (mm)
  • L=length of lip (mm)
  • R=average bent radius (mm)
  • t=steel thickness (mm)
  • A=area of section (mm2)
  • C.G =centre of gravity
  • S.C =shear centre
  • lxx = moment of inertia about X-X axis (mm4)
  • sxx = elastic section modulus about X-X axis (mm3)
  • R = radius of gyration about X-X axis (mm)
  • lyy = moment of inertia about Y-Y axis (mm4)
  • syy = elastic section modulus about Y-Y axis (mm3)
  • ry = radius of gyration about Y-Y axis (mm)
  • rmin = radius of gyration about Z-Z axis (mm)
  • teta = angle between Z-Z axis and Y-Y axis (radians)