IPE 400 vs IPN 400
Parallel flange
IPE 400
66.3 kg/m · 400 × 180 mm
Tapered flange
IPN 400
92.4 kg/m · 400 × 155 mm
66.3Mass G kg/m92.4
84.5Cross-section area A cm²117.7
23 130Moment of inertia Iy cm⁴29 210
1 318Moment of inertia Iz cm⁴1 160
1 156Section modulus Wel,y cm³1 460
1 307Section modulus Wpl,y cm³1 714
165.5Radius of gyration iy mm157.0
39.5Radius of gyration iz mm31.3
50.4Torsion constant It cm⁴170.0
482.9Warping constant Iw ×10³ cm⁶420.0
Bar length is the ratio to the higher value in the row.
Summary
28 %
lighter per metre
Plus 14 % more on the weak axis.
26 %
stiffer on the strong axis
Plus 31 % higher plastic resistance Wpl,y.
Per kilogram of steel IPE 400 is the more efficient bending section, by 9 %.