LU · EN 10056-1

L 120×80/12

L 120×80/12 is an unequal-leg steel angle per EN 10056-1: legs 120×80 mm, thickness 12 mm, weight 17.8 kg/m, cross-section area 22.7 cm², moment of inertia Iy = 323 cm⁴, elastic section modulus Wel,y = 40.4 cm³.

Cross section · mm

120Long leg a · mm

80Short leg b · mm

22.70Area A · cm²

17.80Mass G · kg/m

Geometry

Long leg a120.00 mm

Short leg b80.00 mm

Thickness t12.00 mm

Root radius r₁11.00 mm

Cross-section area A22.700 cm²

Centroid C_x40.0 mm

Centroid C_y20.3 mm

Weight G
steel 7850 kg/m³17.80kg/m

Section properties

I_y323.000 cm⁴

I_z114.000 cm⁴

W_el,y40.400 cm³

W_el,z19.100 cm³

i_y37.70 mm

i_z22.40 mm

Principal axes u–v

I_u370.000 cm⁴

I_v66.700 cm⁴

i_v17.10 mm

tan α0.431 –

Reference

Profile standardEN 10056-1

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of L 120×80/12 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/ 11.1 kN·m

Shear/ 180.2 kN

Compression/ 50.1 kN

Steelγ_M0γ_M1L_crmmkClass3

Resistances and factors

M_c,y,Rd / M_c,z,RdW_el11.1 kN·m / 5.3 kN·m

V_c,z,Rd / V_c,y,RdA_v = 1135 mm²180.2 kN / 180.2 kN

N_pl,Rd / N_b,Rd624.3 kN / 50.1 kN

N_cr,y / N_cr,v267.8 kN / 55.3 kN

f_yEN 10025-2275 MPa

γ_M0 / γ_M11.00 / 1.00

Curve b · χ0.08

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.