LU · EN 10056-1

L 80×40/8

L 80×40/8 is an unequal-leg steel angle per EN 10056-1: legs 80×40 mm, thickness 8 mm, weight 7.1 kg/m, cross-section area 9 cm², moment of inertia Iy = 57.6 cm⁴, elastic section modulus Wel,y = 11.4 cm³.

Cross section · mm

80Long leg a · mm

40Short leg b · mm

9.01Area A · cm²

7.07Mass G · kg/m

Geometry

Long leg a80.00 mm

Short leg b40.00 mm

Thickness t8.00 mm

Root radius r₁7.00 mm

Cross-section area A9.010 cm²

Centroid C_x29.4 mm

Centroid C_y9.6 mm

Weight G
steel 7850 kg/m³7.07kg/m

Section properties

I_y57.600 cm⁴

I_z9.610 cm⁴

W_el,y11.400 cm³

W_el,z3.160 cm³

i_y25.30 mm

i_z10.30 mm

Principal axes u–v

I_u60.900 cm⁴

I_v6.340 cm⁴

i_v8.40 mm

tan α0.253 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 80×40/8 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/ 3.1 kN·m

Shear/ 71.5 kN

Compression/ 5.0 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el3.1 kN·m / 0.9 kN·m

V_c,z,Rd / V_c,y,RdA_v = 451 mm²71.5 kN / 71.5 kN

N_pl,Rd / N_b,Rd247.8 kN / 5.0 kN

N_cr,y / N_cr,v47.8 kN / 5.3 kN

f_yEN 10025-2275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve b · χ0.02

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.

For angles the bending values refer to the axes parallel to the legs, which are not principal axes. A moment about one of them also bends the section about the other, so bending has to be resolved into the principal axes u and v and checked biaxially. Buckling already uses the weaker principal axis v.