Steel Sections

LU Section Properties

Cross-section database with dimensions and mechanical properties per EN 10365. LU profiles — 47 sections.

Profile▲	a[mm]▲	b[mm]▲	t[mm]▲	A[cm²]▲	I_y[cm⁴]▲	I_z[cm⁴]▲	G[kg/m]▲
L 30×20/3	30.00	20.00	3.00	1.43	1.25	0.44	1.12
L 30×20/4	30.00	20.00	4.00	1.86	1.59	0.55	1.46
L 40×20/4	40.00	20.00	4.00	2.26	3.59	0.60	1.77
L 40×25/4	40.00	25.00	4.00	2.46	3.89	1.16	1.93
L 45×30/4	45.00	30.00	4.00	2.86	5.75	2.04	2.25
L 50×30/5	50.00	30.00	5.00	3.78	9.36	2.51	2.96
L 60×30/5	60.00	30.00	5.00	4.29	15.60	2.60	3.37
L 60×40/5	60.00	40.00	5.00	4.79	17.20	6.11	3.76
L 60×40/6	60.00	40.00	6.00	5.68	20.10	7.12	4.46
L 65×50/5	65.00	50.00	5.00	5.54	23.20	11.90	4.35
L 70×50/6	70.00	50.00	6.00	6.89	33.40	14.20	5.41
L 75×50/6	75.00	50.00	6.00	7.19	40.50	14.40	5.65
L 75×50/8	75.00	50.00	8.00	9.41	52.00	18.40	7.39
L 80×40/6	80.00	40.00	6.00	6.89	44.90	7.59	5.41
L 80×40/8	80.00	40.00	8.00	9.01	57.60	9.61	7.07
L 80×60/7	80.00	60.00	7.00	9.38	59.00	28.40	7.36
L 100×50/6	100.00	50.00	6.00	8.71	89.90	15.40	6.84
L 100×50/8	100.00	50.00	8.00	11.40	116.00	19.70	8.97
L 100×65/7	100.00	65.00	7.00	11.20	113.00	37.60	8.77
L 100×65/8	100.00	65.00	8.00	12.70	127.00	42.20	9.94
L 100×65/10	100.00	65.00	10.00	15.60	154.00	51.00	12.30
L 100×75/8	100.00	75.00	8.00	13.50	133.00	64.10	10.60
L 100×75/10	100.00	75.00	10.00	16.60	162.00	77.60	13.00
L 100×75/12	100.00	75.00	12.00	19.70	189.00	90.20	15.40
L 120×80/8	120.00	80.00	8.00	15.50	226.00	80.80	12.20
L 120×80/10	120.00	80.00	10.00	19.10	276.00	98.10	15.00
L 120×80/12	120.00	80.00	12.00	22.70	323.00	114.00	17.80
L 125×75/8	125.00	75.00	8.00	15.50	247.00	67.60	12.20
L 125×75/10	125.00	75.00	10.00	19.10	302.00	82.10	15.00
L 125×75/12	125.00	75.00	12.00	22.70	354.00	95.50	17.80
L 135×65/8	135.00	65.00	8.00	15.50	291.00	45.20	12.20
L 135×65/10	135.00	65.00	10.00	19.10	356.00	54.70	15.00
L 150×75/9	150.00	75.00	9.00	19.60	455.00	77.90	15.40
L 150×75/10	150.00	75.00	10.00	21.60	501.00	85.80	17.00
L 150×75/12	150.00	75.00	12.00	25.70	589.00	99.90	20.20
L 150×75/15	150.00	75.00	15.00	31.60	713.00	120.00	24.80
L 150×90/10	150.00	90.00	10.00	23.20	533.00	146.00	18.20
L 150×90/12	150.00	90.00	12.00	27.50	627.00	171.00	21.60
L 150×90/15	150.00	90.00	15.00	33.90	761.00	205.00	26.60
L 150×100/10	150.00	100.00	10.00	24.20	553.00	198.00	19.00
L 150×100/12	150.00	100.00	12.00	28.70	651.00	233.00	22.50
L 200×100/10	200.00	100.00	10.00	29.20	1 220.00	210.00	23.00
L 200×100/12	200.00	100.00	12.00	34.80	1 440.00	247.00	27.30
L 200×100/14	200.00	100.00	14.00	40.30	1 654.00	282.20	31.60
L 200×100/15	200.00	100.00	15.00	43.00	1 760.00	299.00	33.70
L 200×150/12	200.00	150.00	12.00	40.80	1 650.00	803.00	32.00
L 200×150/15	200.00	150.00	15.00	50.50	2 020.00	979.00	39.60

About LU profiles

An unequal-leg angle (L a×b) has legs of different lengths and is defined by EN 10056-1 together with the equal-leg series. The longer leg gives the section higher stiffness in one direction — useful where space or stiffness demands are asymmetric.

Typical uses: lintels and masonry support angles, bracing, equipment frames, brackets. The principal axes u–v are rotated by an angle α (tan α tabulated), which unlike equal angles is not 45° — buckling is governed by the minimum moment of inertia Iv.

Frequently asked questions

When should I choose an unequal angle over an equal one?

When you need stiffness or bearing surface in one direction only — typically a lintel (long leg vertical) or an equipment ledge. For the same bending demand it is usually lighter than an equal angle.

What is the angle α in the tables?

It is the rotation of the principal axes u–v relative to the geometric axes y–z. For unequal angles it depends on the leg ratio — tables give tan α.

Which moment of inertia governs buckling?

The minimum principal moment of inertia Iv (axis v). Using Iy or Iz would overestimate buckling resistance.

Disclaimer: All content, data, and calculations on this website are provided "as is" for informational purposes only. While we strive for accuracy, we do not warrant that the content is complete, up-to-date, or free of errors. The content does not constitute professional advice and must be verified against the official applicable standards by a qualified person. Use of this data is strictly at the user's own risk, and we accept no liability for any direct or indirect damages resulting from its use.