H-100x50x5x7 - Section Properties

The H-100x50x5x7 is a European narrow I-beam with a mass of 9.3 kg/m, an overall depth of 100 mm and width of 50 mm. It has a cross-sectional area of 11.8 cm², a second moment of area Iᵧ of 188 cm⁴, a plastic modulus Wₚₗ,ᵧ of 44.1 cm³, tabulated by CivilAxis from Continental Steel.

Mass: 9.3 kg/m
Depth: 100 mm
Width: 50 mm
Area: 11.8 cm²

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H-100x50x5x7 section properties to Continental Steel.
Geometry
Depth of section	h	100
Width of section	b	50
Web thickness	t_w	5
Flange thickness	t_f	7
Root fillet radius	r	8
Depth between fillets	d	70
Mass and area
Mass per metre	mass	9.3
Cross-sectional area	A	11.8
Bending about the major axis (y-y)
Area moment of inertia about y-axis	I_y	188
Elastic section modulus about y-axis	W_el,y	37.5
Plastic section modulus about y-axis	W_pl,y	44.1
Radius of gyration about y-axis	i_y	3.98
Bending about the minor axis (z-z)
Area moment of inertia about z-axis	I_z	14.8
Elastic section modulus about z-axis	W_el,z	5.93
Plastic section modulus about z-axis	W_pl,z	9.5
Radius of gyration about z-axis	i_z	1.12
Torsion and warping
Torsion constant (St Venant)	I_t	2.03
Classification and stability
Flange local-buckling ratio	c_f/t_f	3.57
Web local-buckling ratio	c_w/t_w	14
Buckling parameter	u	0.876
Torsional index	X	12.7
Detailing dimensions
End clearance	C	5
Notch dimension N	N	33
Notch dimension n	n	15
Surface area
Surface area per metre	SA/m	0.376

Is H-100x50x5x7 strong enough?

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

Span (m)Load (kN/m)Grade

✅Passes - 62% utilised, deflection governs

Bending31%

4.9 / 15.7 kNm

Shear8%

9.8 / 128.5 kN

Deflection62%

3.4 / 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.