LU · EN 10056-1

L 45×30/4

L 45×30/4 is an unequal-leg steel angle per EN 10056-1: legs 45×30 mm, thickness 4 mm, weight 2.3 kg/m, cross-section area 2.9 cm², moment of inertia Iy = 5.8 cm⁴, elastic section modulus Wel,y = 1.9 cm³.

Cross section · mm

45Long leg a · mm

30Short leg b · mm

2.86Area A · cm²

2.25Mass G · kg/m

Geometry

Long leg a45.00 mm

Short leg b30.00 mm

Thickness t4.00 mm

Root radius r₁4.50 mm

Cross-section area A2.860 cm²

Centroid C_x14.8 mm

Centroid C_y7.4 mm

Weight G
steel 7850 kg/m³2.25kg/m

Section properties

I_y5.750 cm⁴

I_z2.040 cm⁴

W_el,y1.900 cm³

W_el,z0.903 cm³

i_y14.20 mm

i_z8.40 mm

Principal axes u–v

I_u6.610 cm⁴

I_v1.190 cm⁴

i_v6.40 mm

tan α0.433 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 45×30/4 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/ 0.5 kN·m

Shear/ 22.7 kN

Compression/ 1.0 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el0.5 kN·m / 0.2 kN·m

V_c,z,Rd / V_c,y,RdA_v = 143 mm²22.7 kN / 22.7 kN

N_pl,Rd / N_b,Rd78.7 kN / 1.0 kN

N_cr,y / N_cr,v4.8 kN / 1.0 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.