IPE 100 - Section Properties

The IPE 100 is a European I-beam (IPE) with a mass of 8.1 kg/m, an overall depth of 100 mm and width of 55 mm. It has a cross-sectional area of 10.3 cm², a second moment of area Iᵧ of 171 cm⁴, a plastic modulus Wₚₗ,ᵧ of 39.4 cm³, tabulated by CivilAxis from EN 10365 · Continental Steel.

Mass: 8.1 kg/m
Depth: 100 mm
Width: 55 mm
Area: 10.3 cm²

Ask about capacity, buckling or detailing for IPE 100.

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Dimension symbols for IPE sections. Not to scale.

IPE 100 section properties to EN 10365 · Continental Steel.
Geometry
Depth of section	h	100
Width of section	b	55
Web thickness	t_w	4.1
Flange thickness	t_f	5.7
Root fillet radius	r	7
Depth between fillets	d	74.6
Mass and area
Mass per metre	mass	8.1
Cross-sectional area	A	10.3
Bending about the major axis (y-y)
Area moment of inertia about y-axis	I_y	171
Elastic section modulus about y-axis	W_el,y	34.2
Plastic section modulus about y-axis	W_pl,y	39.4
Radius of gyration about y-axis	i_y	4.07
Bending about the minor axis (z-z)
Area moment of inertia about z-axis	I_z	15.9
Elastic section modulus about z-axis	W_el,z	6
Plastic section modulus about z-axis	W_pl,z	9.2
Radius of gyration about z-axis	i_z	1.24
Torsion and warping
Torsion constant (St Venant)	I_t	1.16
Warping constant	I_w	0.00035
Classification and stability
Flange local-buckling ratio	c_f/t_f	3.24
Web local-buckling ratio	c_w/t_w	18.2
Buckling parameter	u	3.333
Torsional index	X	15.8
Detailing dimensions
End clearance	C	4
Notch dimension N	N	36
Notch dimension n	n	14
Surface area
Surface area per metre	SA/m	0.4

Is IPE 100 strong enough?

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

Span (m)Load (kN/m)Grade

✅Passes - 57% utilised, deflection governs

Bending29%

4.1 / 14.0 kNm

Shear8%

8.3 / 103.7 kN

Deflection57%

3.2 / 5.6 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.