RHS · EN 10219 · cold formed

RHS 80×40/2.5

RHS 80×40/2.5 is a cold-formed rectangular hollow section per EN 10219: height 80 mm, width 40 mm, wall thickness 2.5 mm, weight 4.4 kg/m, cross-section area 5.6 cm², moment of inertia Iy = 45.1 cm⁴, elastic section modulus Wel,y = 11.3 cm³.

Cross section · mm

80Height h · mm

40Width b · mm

5.59Area A · cm²

4.39Mass G · kg/m

Geometry

Height h80.00 mm

Width b40.00 mm

Wall thickness t2.50 mm

Outer corner radius r_o5.00 mm

Inner corner radius r_i2.50 mm

Cross-section area A5.590 cm²

Weight G
steel 7850 kg/m³4.39kg/m

Section properties

I45.110 cm⁴15.260 cm⁴

W_el11.280 cm³7.628 cm³

W_pl14.150 cm³8.717 cm³

I_t37.580 cm⁴

Reference

Profile standardEN 10219

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of RHS 80×40/2.5 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/ 3.9 kN·m

Shear/ 59.2 kN

Compression/ 11.1 kN

Steelγ_M0γ_M1L_crmmkClass1

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl3.9 kN·m / 2.4 kN·m

V_c,z,Rd / V_c,y,RdA_v = 373 mm²59.2 kN / 29.6 kN

N_pl,Rd / N_b,Rd153.7 kN / 11.1 kN

N_cr,y / N_cr,z37.4 kN / 12.7 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.