LU · EN 10056-1

L 30×20/4

L 30×20/4 is an unequal-leg steel angle per EN 10056-1: legs 30×20 mm, thickness 4 mm, weight 1.5 kg/m, cross-section area 1.9 cm², moment of inertia Iy = 1.6 cm⁴, elastic section modulus Wel,y = 0.8 cm³.

Cross section · mm

30Long leg a · mm

20Short leg b · mm

1.86Area A · cm²

1.46Mass G · kg/m

Geometry

Long leg a30.00 mm

Short leg b20.00 mm

Thickness t4.00 mm

Root radius r₁4.00 mm

Cross-section area A1.860 cm²

Centroid C_x10.3 mm

Centroid C_y5.4 mm

Weight G
steel 7850 kg/m³1.46kg/m

Section properties

I_y1.590 cm⁴

I_z0.553 cm⁴

W_el,y0.807 cm³

W_el,z0.379 cm³

i_y9.20 mm

i_z5.50 mm

Principal axes u–v

I_u1.810 cm⁴

I_v0.330 cm⁴

i_v4.20 mm

tan α0.421 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 30×20/4 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/ 0.2 kN·m

Shear/ 14.8 kN

Compression/ 0.3 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el0.2 kN·m / 0.1 kN·m

V_c,z,Rd / V_c,y,RdA_v = 93 mm²14.8 kN / 14.8 kN

N_pl,Rd / N_b,Rd51.1 kN / 0.3 kN

N_cr,y / N_cr,v1.3 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.