IPE 180 vs IPN 180
Parallel flange
IPE 180
18.8 kg/m · 180 × 91 mm
Tapered flange
IPN 180
21.9 kg/m · 180 × 82 mm
18.8Mass G kg/m21.9
23.9Cross-section area A cm²27.9
1 317Moment of inertia Iy cm⁴1 450
101Moment of inertia Iz cm⁴81
146Section modulus Wel,y cm³161
166Section modulus Wpl,y cm³187
74.2Radius of gyration iy mm72.0
20.5Radius of gyration iz mm17.1
4.7Torsion constant It cm⁴9.6
7.3Warping constant Iw ×10³ cm⁶5.9
Bar length is the ratio to the higher value in the row.
Summary
14 %
lighter per metre
Plus 24 % more on the weak axis.
10 %
stiffer on the strong axis
Plus 12 % higher plastic resistance Wpl,y.
Per kilogram of steel IPE 180 is the more efficient bending section, by 5 %.