FL · EN 10058

FL 70×30

FL 70×30 is a hot rolled steel flat bar per EN 10058: width 70 mm, thickness 30 mm, weight 16.5 kg/m, cross-section area 21 cm², moment of inertia Iy = 85.8 cm⁴, elastic section modulus Wel,y = 24.5 cm³.

Cross section · mm

70Width b · mm

30Thickness t · mm

21.00Area A · cm²

16.48Mass G · kg/m

Geometry

Width b70.00 mm

Thickness t30.00 mm

Cross-section area A21.000 cm²

Weight G
steel 7850 kg/m³16.48kg/m

Section properties

I85.750 cm⁴15.750 cm⁴

W_el24.500 cm³10.500 cm³

W_pl36.750 cm³15.750 cm³

i20.20 mm8.66 mm

Reference

Profile standardEN 10058

EurocodeEN 1993-1-1 (EC3)

Check to EN 1993-1-1

Work out the utilisation of FL 70×30 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/ 9.7 kN·m

Shear/ 321.3 kN

Compression/ 12.2 kN

Steelγ_M0γ_M1L_crmmkf_y265MPaClass1

Resistances and factors

M_c,y,Rd / M_c,z,RdW_pl9.7 kN·m / 4.2 kN·m

V_c,z,Rd / V_c,y,RdA_v = 2100 mm²321.3 kN / 321.3 kN

N_pl,Rd / N_b,Rd556.5 kN / 12.2 kN

N_cr,y / N_cr,z71.1 kN / 13.1 kN

f_yt = 30.0 mm > 16 mm, EN 10025-2265 MPa

γ_M0 / γ_M11.00 / 1.00

Curve c · χ0.02

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.