UPN Section Properties

EN 10365 · 18 sections

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	GEOMETRY				AREA	BENDING				WEIGHT
Profile	h[mm]▲	b[mm]▲	t_w[mm]▲	t_f[mm]▲	A[cm²]▲	I_y[cm⁴]▲	I_z[cm⁴]▲	W_y[cm³]▲	W_z[cm³]▲	G[kg/m]▲
UPN 50	50	38	5	7	7.12	26.4	9.12	10.6	3.75	5.6
UPN 65	65	42	5.5	7.5	9.03	57.5	14.1	17.7	5.07	7.1
UPN 80	80	45	6	8	11	106	19.4	26.5	6.36	8.6
UPN 100	100	50	6	8.5	13.5	206	29.3	41.2	8.49	10.6
UPN 120	120	55	7	9	17	364	43.2	60.7	11.1	13.4
UPN 140	140	60	7	10	20.4	605	62.7	86.4	14.8	16
UPN 160	160	65	7.5	10.5	24	925	85.3	116	18.3	18.8
UPN 180	180	70	8	11	28	1 350	114	150	22.4	22
UPN 200	200	75	8.5	11.5	32.2	1 910	148	191	27	25.3
UPN 220	220	80	9	12.5	37.4	2 690	197	245	33.6	29.4
UPN 240	240	85	9.5	13	42.3	3 600	248	300	39.6	33.2
UPN 260	260	90	10	14	48.3	4 820	317	371	47.7	37.9
UPN 280	280	95	10	15	53.3	6 280	399	448	57.2	41.8
UPN 300	300	100	10	16	58.8	8 030	495	535	67.8	46.2
UPN 320	320	100	14	17.5	75.8	10 870	597	679	80.6	59.5
UPN 350	350	100	14	16	77.3	12 840	570	734	75	60.6
UPN 380	380	102	13.5	16	80.4	15 760	615	829	78.7	63.1
UPN 400	400	110	14	18	91.5	20 350	846	1 020	102	71.8

About UPN profiles

UPN is a European rolled U-channel (structural channel) with a vertical web and two parallel flanges. Designation UPN = U-Profil Normal. Defined by EN 10365.

The section has one axis of symmetry (parallel to the flanges). The centroid lies inside the section, shifted from the web toward the open side of the U. UPN is used for frames, ladders, roof trusses, vehicle side rails, and structures where the flat web face is advantageous (easy bolted connections). Because of asymmetry, the centroid position (ey) and the fact that the shear centre lies outside the section matter for design: eccentric loads cause torsion. UPN has much lower torsional stiffness than closed sections.

Frequently asked questions

What does UPN stand for?

UPN stands for U-Profil Normal, the European standard U-channel with parallel flanges per EN 10365.

Why is ey listed for UPN?

UPN is asymmetric: the centroid is not at the web midline. The value ey is the distance from the outer web edge to the centroid and is needed for moment and eccentricity calculations.

Is UPN suitable for torsion?

No, UPN has very low torsional stiffness (open section). For torsional loads, closed sections (SHS, RHS, CHS) are better, or UPN must be restrained against twist by structural detailing.

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