RHS · EN 10219 · cold formed

RHS 80×40/4

RHS 80×40/4 is a cold-formed rectangular hollow section per EN 10219: height 80 mm, width 40 mm, wall thickness 4 mm, weight 6.7 kg/m, cross-section area 8.6 cm², moment of inertia Iy = 64.8 cm⁴, elastic section modulus Wel,y = 16.2 cm³.

Cross section · mm

80Height h · mm

40Width b · mm

8.55Area A · cm²

6.71Mass G · kg/m

Geometry

Height h80.00 mm

Width b40.00 mm

Wall thickness t4.00 mm

Outer corner radius r_o8.00 mm

Inner corner radius r_i4.00 mm

Cross-section area A8.550 cm²

Weight G
steel 7850 kg/m³6.71kg/m

Section properties

I64.790 cm⁴21.490 cm⁴

W_el16.200 cm³10.740 cm³

W_pl20.910 cm³12.770 cm³

I_t55.240 cm⁴

Reference

Profile standardEN 10219

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/ 5.8 kN·m

Shear/ 90.5 kN

Compression/ 15.7 kN

Steelγ_M0γ_M1L_crmmkClass1

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl5.8 kN·m / 3.5 kN·m

V_c,z,Rd / V_c,y,RdA_v = 570 mm²90.5 kN / 45.2 kN

N_pl,Rd / N_b,Rd235.1 kN / 15.7 kN

N_cr,y / N_cr,z53.7 kN / 17.8 kN

f_yEN 10219-1275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve c · 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.