UPN 300 vs UPE 300
Tapered flange
UPN 300
46.2 kg/m · 300 × 100 mm
Parallel flange
UPE 300
44.4 kg/m · 300 × 100 mm
46.2Mass G kg/m44.4
58.8Cross-section area A cm²56.6
8 030Moment of inertia Iy cm⁴7 823
495Moment of inertia Iz cm⁴538
535Section modulus Wel,y cm³522
632Section modulus Wpl,y cm³613
117.0Radius of gyration iy mm117.6
29.0Radius of gyration iz mm30.8
37.4Torsion constant It cm⁴31.5
69.1Warping constant Iw ×10³ cm⁶72.7
Bar length is the ratio to the higher value in the row.
Summary
3 %
stiffer on the strong axis
Plus 3 % higher plastic resistance Wpl,y.
4 %
lighter per metre
Plus 9 % more on the weak axis.
Per kilogram of steel both are equally efficient in bending, Iy/G differs by 1 %.