CHS · EN 10219 · cold formed

CHS 177.8/4

CHS 177.8/4 is a cold-formed circular hollow section per EN 10219: outer diameter 177.8 mm, wall thickness 4 mm, weight 17.1 kg/m, cross-section area 21.8 cm², moment of inertia Iy = 825.1 cm⁴, elastic section modulus Wel,y = 92.8 cm³.

Cross section · mm

177.8Outer diameter d · mm

4Wall thickness t · mm

21.84Area A · cm²

17.10Mass G · kg/m

Geometry

Outer diameter d177.80 mm

Wall thickness t4.00 mm

Cross-section area A21.840 cm²

Weight G
steel 7850 kg/m³17.10kg/m

Section properties

Moment of inertia I825.100 cm⁴

W_el92.810 cm³

W_pl120.800 cm³

Radius of gyration i61.50 mm

Torsion constant I_t1 650.000 cm⁴

Reference

Profile standardEN 10219

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of CHS 177.8/4 for your design forces

Find the lightest section Compare sections

Enter the design loads and the section is checked for bending, shear and compression with flexural buckling.

Bending/ 33.2 kN·m

Shear/ 220.8 kN

Compression/ 346.7 kN

Steelγ_M0γ_M1L_crmmkClass2

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl33.2 kN·m / 33.2 kN·m

V_c,z,Rd / V_c,y,RdA_v = 1390 mm²220.8 kN / 220.8 kN

N_pl,Rd / N_b,Rd600.6 kN / 346.7 kN

N_cr,y / N_cr,z684.0 kN / 684.0 kN

f_yEN 10219-1275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve c · χ0.58

Yield strength is taken from the product standard for the governing thickness, so above 16 mm it is lower than the nominal grade. Simplified checks per EN 1993-1-1, without M+N+V interaction, without lateral-torsional buckling and without web shear buckling. Verify with a full design.