IPE 80 - Section Properties

The IPE 80 is a European I-beam (IPE) with a mass of 6 kg/m, an overall depth of 80 mm and width of 46 mm. It has a cross-sectional area of 7.6 cm², a second moment of area Iᵧ of 80.1 cm⁴, a plastic modulus Wₚₗ,ᵧ of 23.2 cm³, tabulated by CivilAxis from EN 10365 · Continental Steel.

Mass: 6 kg/m
Depth: 80 mm
Width: 46 mm
Area: 7.6 cm²

Ask about capacity, buckling or detailing for IPE 80.

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Dimension symbols for IPE sections. Not to scale.

IPE 80 section properties to EN 10365 · Continental Steel.
Geometry
Depth of section	h	80
Width of section	b	46
Web thickness	t_w	3.8
Flange thickness	t_f	5.2
Root fillet radius	r	5
Depth between fillets	d	59.6
Mass and area
Mass per metre	mass	6
Cross-sectional area	A	7.6
Bending about the major axis (y-y)
Area moment of inertia about y-axis	I_y	80.1
Elastic section modulus about y-axis	W_el,y	20
Plastic section modulus about y-axis	W_pl,y	23.2
Radius of gyration about y-axis	i_y	3.24
Bending about the minor axis (z-z)
Area moment of inertia about z-axis	I_z	8.49
Elastic section modulus about z-axis	W_el,z	4
Plastic section modulus about z-axis	W_pl,z	5.8
Radius of gyration about z-axis	i_z	1.05
Torsion and warping
Torsion constant (St Venant)	I_t	0.67
Warping constant	I_w	0.00012
Classification and stability
Flange local-buckling ratio	c_f/t_f	3.1
Web local-buckling ratio	c_w/t_w	15.7
Buckling parameter	u	3.065
Torsional index	X	14.3
Detailing dimensions
End clearance	C	4
Notch dimension N	N	32
Notch dimension n	n	12
Surface area
Surface area per metre	SA/m	0.328

Is IPE 80 strong enough?

Simply supported beam, uniform load, major-axis bending - to EN 1993-1-1.

Span (m)Load (kN/m)Grade

✅Passes - 61% utilised, deflection governs

Bending33%

2.7 / 8.2 kNm

Shear10%

7.3 / 72.4 kN

Deflection61%

2.5 / 4.2 mm

Class 1 section. ULS uses γQ = 1.5 on the load you enter; deflection uses the unfactored load against L/360. Lateral-torsional buckling is not included - the compression flange is assumed restrained.