RHS · EN 10219 · cold formed

RHS 100×80/2.5

RHS 100×80/2.5 is a cold-formed rectangular hollow section per EN 10219: height 100 mm, width 80 mm, wall thickness 2.5 mm, weight 6.7 kg/m, cross-section area 8.6 cm², moment of inertia Iy = 126.9 cm⁴, elastic section modulus Wel,y = 25.4 cm³.

Cross section · mm

100Height h · mm

80Width b · mm

8.59Area A · cm²

6.74Mass G · kg/m

Geometry

Height h100.00 mm

Width b80.00 mm

Wall thickness t2.50 mm

Outer corner radius r_o5.00 mm

Inner corner radius r_i2.50 mm

Cross-section area A8.590 cm²

Weight G
steel 7850 kg/m³6.74kg/m

Section properties

I126.900 cm⁴90.170 cm⁴

W_el25.370 cm³22.540 cm³

W_pl29.980 cm³25.770 cm³

I_t165.800 cm⁴

Reference

Profile standardEN 10219

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of RHS 100×80/2.5 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/ 8.2 kN·m

Shear/ 75.8 kN

Compression/ 56.6 kN

Steelγ_M0γ_M1L_crmmkClass1 / 3bending / compression

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl8.2 kN·m / 7.1 kN·m

V_c,z,Rd / V_c,y,RdA_v = 477 mm²75.8 kN / 60.6 kN

N_pl,Rd / N_b,Rd236.2 kN / 56.6 kN

N_cr,y / N_cr,z105.2 kN / 74.8 kN

f_yEN 10219-1275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve c · χ0.24

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.