UPN 400 vs UPE 400
Tapered flange
UPN 400
71.8 kg/m · 400 × 110 mm
Parallel flange
UPE 400
72.2 kg/m · 400 × 115 mm
71.8Mass G kg/m72.2
91.5Cross-section area A cm²91.9
20 350Moment of inertia Iy cm⁴20 980
846Moment of inertia Iz cm⁴1 045
1 020Section modulus Wel,y cm³1 049
1 240Section modulus Wpl,y cm³1 263
149.0Radius of gyration iy mm151.1
30.4Radius of gyration iz mm33.7
81.6Torsion constant It cm⁴79.1
221.0Warping constant Iw ×10³ cm⁶259.0
Bar length is the ratio to the higher value in the row.
Summary
=
the same mass per metre
Compared with UPE 400.
24 %
stiffer on the weak axis
Plus 3 % more on the strong axis and 2 % higher plastic resistance Wpl,y.
Per kilogram of steel both are equally efficient in bending, Iy/G differs by 2 %.