LU · EN 10056-1

L 40×20/4

L 40×20/4 is an unequal-leg steel angle per EN 10056-1: legs 40×20 mm, thickness 4 mm, weight 1.8 kg/m, cross-section area 2.3 cm², moment of inertia Iy = 3.6 cm⁴, elastic section modulus Wel,y = 1.4 cm³.

Cross section · mm

40Long leg a · mm

20Short leg b · mm

2.26Area A · cm²

1.77Mass G · kg/m

Geometry

Long leg a40.00 mm

Short leg b20.00 mm

Thickness t4.00 mm

Root radius r₁4.00 mm

Cross-section area A2.260 cm²

Centroid C_x14.7 mm

Centroid C_y4.8 mm

Weight G
steel 7850 kg/m³1.77kg/m

Section properties

I_y3.590 cm⁴

I_z0.596 cm⁴

W_el,y1.420 cm³

W_el,z0.393 cm³

i_y12.60 mm

i_z5.10 mm

Principal axes u–v

I_u3.800 cm⁴

I_v0.393 cm⁴

i_v4.20 mm

tan α0.252 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 40×20/4 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/ 0.4 kN·m

Shear/ 17.9 kN

Compression/ 0.3 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el0.4 kN·m / 0.1 kN·m

V_c,z,Rd / V_c,y,RdA_v = 113 mm²17.9 kN / 17.9 kN

N_pl,Rd / N_b,Rd62.1 kN / 0.3 kN

N_cr,y / N_cr,v3.0 kN / 0.3 kN

f_yEN 10025-2275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve b · χ0.01

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.