LU · EN 10056-1

L 40×25/4

L 40×25/4 is an unequal-leg steel angle per EN 10056-1: legs 40×25 mm, thickness 4 mm, weight 1.9 kg/m, cross-section area 2.5 cm², moment of inertia Iy = 3.9 cm⁴, elastic section modulus Wel,y = 1.5 cm³.

Cross section · mm

40Long leg a · mm

25Short leg b · mm

2.46Area A · cm²

1.93Mass G · kg/m

Geometry

Long leg a40.00 mm

Short leg b25.00 mm

Thickness t4.00 mm

Root radius r₁4.00 mm

Cross-section area A2.460 cm²

Centroid C_x13.6 mm

Centroid C_y6.2 mm

Weight G
steel 7850 kg/m³1.93kg/m

Section properties

I_y3.890 cm⁴

I_z1.160 cm⁴

W_el,y1.470 cm³

W_el,z0.619 cm³

i_y12.60 mm

i_z6.90 mm

Principal axes u–v

I_u4.350 cm⁴

I_v0.701 cm⁴

i_v5.30 mm

tan α0.380 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 40×25/4 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/ 19.5 kN

Compression/ 0.6 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el0.4 kN·m / 0.2 kN·m

V_c,z,Rd / V_c,y,RdA_v = 123 mm²19.5 kN / 19.5 kN

N_pl,Rd / N_b,Rd67.7 kN / 0.6 kN

N_cr,y / N_cr,v3.2 kN / 0.6 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.