RHS · EN 10210 · hot finished

RHS 80×40/4

RHS 80×40/4 is a hot-finished rectangular hollow section per EN 10210: height 80 mm, width 40 mm, wall thickness 4 mm, weight 6.9 kg/m, cross-section area 8.8 cm², moment of inertia Iy = 68.2 cm⁴, elastic section modulus Wel,y = 17.1 cm³.

Cross section · mm

80Height h · mm

40Width b · mm

8.79Area A · cm²

6.90Mass G · kg/m

Geometry

Height h80.00 mm

Width b40.00 mm

Wall thickness t4.00 mm

Outer corner radius r_o6.00 mm

Inner corner radius r_i4.00 mm

Cross-section area A8.790 cm²

Weight G
steel 7850 kg/m³6.90kg/m

Section properties

I68.200 cm⁴22.240 cm⁴

W_el17.050 cm³11.120 cm³

W_pl21.820 cm³13.200 cm³

I_t55.190 cm⁴

Reference

Profile standardEN 10210

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of RHS 80×40/4 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/ 6.0 kN·m

Shear/ 93.0 kN

Compression/ 17.4 kN

Steelγ_M0γ_M1L_crmmkClass1

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl6.0 kN·m / 3.6 kN·m

V_c,z,Rd / V_c,y,RdA_v = 586 mm²93.0 kN / 46.5 kN

N_pl,Rd / N_b,Rd241.7 kN / 17.4 kN

N_cr,y / N_cr,z56.5 kN / 18.4 kN

f_yEN 10210-1275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve a · χ0.07

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.