RHS · EN 10219 · cold formed

RHS 80×40/3

RHS 80×40/3 is a cold-formed rectangular hollow section per EN 10219: height 80 mm, width 40 mm, wall thickness 3 mm, weight 5.2 kg/m, cross-section area 6.6 cm², moment of inertia Iy = 52.3 cm⁴, elastic section modulus Wel,y = 13.1 cm³.

Cross section · mm

80Height h · mm

40Width b · mm

6.61Area A · cm²

5.19Mass G · kg/m

Geometry

Height h80.00 mm

Width b40.00 mm

Wall thickness t3.00 mm

Outer corner radius r_o6.00 mm

Inner corner radius r_i3.00 mm

Cross-section area A6.610 cm²

Weight G
steel 7850 kg/m³5.19kg/m

Section properties

I52.250 cm⁴17.560 cm⁴

W_el13.060 cm³8.778 cm³

W_pl16.540 cm³10.160 cm³

I_t43.880 cm⁴

Reference

Profile standardEN 10219

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of RHS 80×40/3 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/ 4.5 kN·m

Shear/ 70.0 kN

Compression/ 12.8 kN

Steelγ_M0γ_M1L_crmmkClass1

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl4.5 kN·m / 2.8 kN·m

V_c,z,Rd / V_c,y,RdA_v = 441 mm²70.0 kN / 35.0 kN

N_pl,Rd / N_b,Rd181.8 kN / 12.8 kN

N_cr,y / N_cr,z43.3 kN / 14.6 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.