Angle Irons

Hot Formed Equal Leg

There are many advantages to constructing with steel: the strength to weight ratio is excellent; metals join easily; efficient shapes are available; etc. These advantages create challenges that are best solved by a good understanding of how the metals actually perform in a structure. Structural steel shapes are suitable for a wide variety of uses. For example they are used in, building frames, roof trusses, floor framing, bench frames, gates, fences, cattle grids, scaffolds, tank stands, television towers, car trailers, rails, etc.

Most structural steel failures occur at connections, where a beam connects to a column, where a joist connects to a beam, etc. The Structural Engineer must design the steel members and give guidelines for the connections. The cold-formed sections are suitable for all types of welding, such as spot welding, seam welding, projection welding, butt and groove welding, plug welding and arc welding. All of these are applicable to both uncoated and zinc coated sections.

Different shapes of structural steel (both hot-rolled and cold-formed) are available with specifications such as: I-beam’s, Z-Shape (half a flange in opposite directions), HSS-Shape (Hollow structural section such as square, rectangular, circular (pipe) and elliptical cross-sections), Equal angle, L-shaped cross-section, Channel ( [-shaped), Tee (T-shaped cross-sections), Rail profile (asymmetrical I-beam), Flanged T-rail, Bar (a piece of metal flat and long), Plate (metal sheets thicker than 6 mm or 1⁄4 in), Open web steel joist.

Some structural steel shapes such as I-beams have a high second moments of area, which can result in stiffness compared to cross-sectional area. It is very important for engineers to have understanding of the material and its limitations.

Hot formed steel angle iron Equal leg

Angles (equal leg) dimensions and properties
	m	r1	r2	A	ax	ay	v1	v2
Designation hbt	kg/m	mm	mm	10^3mm^2	mm	mm	mm	mm
25x25x3	1.11	3.5	2	0.142	7.21	7.21	10.2	8.77
5	1.77	3.5	2	0.226	7.98	7.98	11.3	9.10
30x30x3	1.36	5	2.5	0.174	8.35	8.35	11.8	10.5
5	2.18	5	2.5	0.278	9.18	9.18	13.0	10.7
40x40x3	1.87	6	3	0.235	10.7	10.7	15.2	14.0
4	2.42	6	3	0.308	11.2	11.2	15.8	14.0
5	2.97	6	3	0.379	11.6	11.6	16.4	14.1
6	3.52	6	3	0.448	12.0	12.0	17.0	14.3
45x45x3	2.13	7	3.5	0.268	11.9	11.9	16.7	15.7
4	2.74	7	3.5	0.349	12.3	12.3	17.4	15.8
5	3.38	7	3.5	0.430	12.8	12.8	18.1	15.8
50x50x3	2.37	7	3.5	0.298	13.1	13.1	18.5	17.5
4	3.06	7	3.5	0.389	13.6	13.6	19.2	17.6
5	3.77	7	3.5	0.480	14.0	14.0	19.0	17.6
6	4.47	7	3.5	0.569	14.5	14.5	20.4	17.7
8	5.82	7	3.5	0.741	15.2	15.2	21.6	18.0
60x60x4	3.70	8	4	0.471	16.0	16.0	22.6	21.0
5	4.57	8	4	0.582	16.4	16.4	23.2	21.1
6	5.42	8	4	0.691	16.9	16.9	23.9	21.1
8	7.09	8	4	0.903	17.7	17.7	25.0	21.4
10	8.69	8	4	1.11	18.5	18.5	26.1	21.7
70x70x6	6.38	9	4.5	0.813	19.3	19.3	27.3	24.6
8	8.36	9	4.5	1.06	20.1	20.1	28.5	24.8
10	10.3	9	4.5	1.31	20.9	20.9	29.6	25.1
80x80x6	7.34	10	5	0.935	21.7	21.7	30.7	28.1
8	9.63	10	5	1.23	22.6	22.6	31.9	28.3
10	11.9	10	5	1.51	23.4	23.4	33.0	28.5
12	14.0	10	5	1.79	24.1	24.1	34.1	28.9
90x90x6	8.30	11	5.5	1.06	24.1	24.1	34.0	31.5
8	10.9	11	5.5	1.39	25	25	35.3	31.7
10	13.4	11	5.5	1.71	25.8	25.8	36.5	31.9
12	15.9	11	5.5	2.03	26.6	26.6	37.6	32.2
100x100x8	12.2	12	6	1.55	27.4	27.4	38.7	35.2
10	15.0	12	6	1.92	28.2	28.2	39.9	35.4
12	17.8	12	6	2.27	29.0	29.0	41.1	35.7
15	21.9	12	6	2.79	30.2	30.2	42.7	36.1
120x120x8	14.7	13	6.5	1.87	32.3	32.3	45.6	42.0
10	18.2	13	6.5	2.32	33.1	33.1	46.9	42.4
12	21.6	13	6.5	2.75	34.0	34.0	48.0	42.6
15	26.6	13	6.5	3.39	35.1	35.1	49.7	43.1
150x150x10	23.0	16	8	2.93	40.3	40.3	57.1	52.5
12	27.3	16	8	3.48	41.2	41.2	58.3	52.9
15	33.8	16	8	4.30	42.5	42.5	60.1	53.3
18	40.1	16	8	5.10	43.7	43.7	61.7	53.7
200x200x16	48.5	18	9	6.18	55.2	55.2	78.1	70.9
18	54.2	18	9	6.91	56.0	56.0	79.3	71.2
20	59.9	18	9	7.63	56.8	56.8	80.4	71.5
24	71.1	18	9	9.06	58.4	58.4	82.6	72.1

Angles (equal leg) dimensions and properties (continued)

	I	Ze	r	J
Designation hbt	10^6mm^4	10^3mm^3	mm	10^3mm^4
	About x-x and y-y
25x25x3	0.008	0.448	7.49	0.476
5	0.012	0.708	7.30	1.98
30x30x3	0.014	0.649	8.99	0.635
5	0.022	1.04	8.83	2.58
40x40x3	0.035	1.18	12.1	0.882
4	0.045	1.55	12.1	1.92
5	0.054	1.91	12.0	3.56
6	0.063	2.26	11.9	5.92
45x45x3	0.050	1.52	13.7	1.06
4	0.064	1.97	13.6	2.27
5	0.078	2.43	13.5	4.17
50x50x3	0.070	1.89	15.3	1.15
4	0.090	2.46	15.2	2.48
5	0.110	3.05	15.1	4.58
6	0.128	3.61	15.0	7.62
8	0.163	4.68	14.8	17.0
60x60x4	0.158	3.59	18.3	3.07
5	0.194	4.45	18.2	5.64
6	0.228	5.29	18.2	9.36
8	0.292	6.89	18.0	21.0
10	0.349	8.41	17.8	39.2
70x70x6	0.369	7.27	21.3	11.2
8	0.475	9.52	21.1	25.0
10	0.572	11.7	20.9	46.8
80x80x6	0.558	9.57	24.4	13.0
8	0.722	12.6	24.3	29.1
10	0.875	15.4	24.1	54.5
12	1.02	18.2	23.9	91.2
90x90x6	0.803	12.2	27.6	15.0
8	1.04	16.1	27.4	33.3
10	1.27	19.8	27.2	62.4
12	1.48	23.3	27.0	104
100x100x8	1 .45	19.9	30.6	37.6
10	1.77	24.6	30.4	70.3
12	2.07	29.1	30.2	118
15	2.49	35.6	29.8	221
120x120x8	2.55	29.1	36.9	45.4
10	3.13	36.0	36.7	85.1
12	3.68	42.7	36.5	143
15	4.45	52.4	36.2	269
150x150x10	6.24	56.9	46.2	110
12	7.37	67.7	46.0	184
15	8.98	83.5	45.7	347
18	10.5	98.7	45.4	584
200x200x16	23.4	162	61.6	564
18	26.0	181	61.3	790
20	28.5	199	61.1	1070
24	33.3	235	60.6	1800
	About u-u
25x25x3	0.013	0.714	9.43	0.476
5	0.019	0.107	9.14	1.98
30x30x3	0.022	1.05	11.3	0.635
5	0.034	1.61	11.1	2.58
40x40x3	0.055	1.93	15.3	0.882
4	0.071	2.51	15.2	1.92
5	0.086	3.04	15.1	3.56
6	0.100	3.53	14.9	5.92
45x45x3	0.079	2.49	17.2	1.06
4	0.102	3.20	17.1	2.27
5	0.124	3.90	17.0	4.17
50x50x3	0.110	3.12	19.2	1.15
4	0.142	4.02	19.1	2.48
5	0.174	4.92	19.0	4.58
6	0.203	5.75	18.9	7.62
8	0.257	7.27	18.6	17.0
60x60x4	0.250	5.90	23.0	3.07
5	0.307	7.24	23.0	5.64
6	0.361	8.52	22.9	9.36
8	0.461	10.9	22.6	21.0
10	0.551	13.0	22.3	39.2
70x70x6	0.585	11.8	26.8	11.2
8	0.753	15.2	26.6	25.0
10	0.905	18.3	26.3	46.8
80x80x6	0.885	15.6	30.8	13.0
8	1.15	20.3	30.6	29.1
10	1.39	24.5	30.3	54.5
12	1.61	28.4	30.0	91.2
90x90x6	1.27	20.0	34.7	15.0
8	1.66	26.0	34.5	33.3
10	2.01	31.6	34.3	62.4
12	2.34	36.8	34.0	104
100x100x8	2.30	32.5	38.5	37.6
10	2.80	39.6	38.3	70.3
12	3.28	46.3	38.0	118
15	3.93	55.5	37.5	221
120x120x8	4.05	47.8	46.5	45.4
10	4.97	58.6	46.3	85.1
12	5.84	68.8	46.0	143
15	7.05	83.1	45.6	269
150x150x10	9.91	93.4	58.2	110
12	11.7	110	58.0	184
15	14.3	134	57.6	347
18	16.6	157	57.1	584
200x200x16	37.2	263	77.6	564
18	41.3	292	77.3	790
20	45.3	320	77.0	1070
24	52.8	374	76.4	1800
	About v-v
25x25x3	0.003	0.324	4.83	0.476
5	0.005	0.462	4.80	1.98
30x30x3	0.006	0.496	5.81	0.635
5	0.009	0.706	5.75	2.58
40x40x3	0.014	0.951	7.84	0.882
4	0.019	1.17	7.77	1.92
5	0.023	1.38	7.73	3.56
6	0.027	1.56	7.70	5.92
45x45x3	0.021	1.25	8.88	1.06
4	0.027	1.53	8.76	2.27
5	0.033	1.80	8.71	4.17
50x50x3	0.029	1.58	9.92	1.15
4	0.037	1.94	9.79	2.48
5	0.046	2.29	9.73	4.58
6	0.053	2.61	9.68	7.62
8	0.069	3.19	9.63	17.0
60x60x4	0.066	2.92	11.8	3.07
5	0.080	3.45	11.7	5.64
6	0.094	3.96	11.7	9.36
8	0.122	4.86	11.6	21.0
10	0.148	5.67	11.6	39.2
70x70x6	0.153	5.60	13.7	11.2
8	0.197	6.92	13.6	25.0
10	0.240	8.10	13.5	46.8
80x80x6	0.231	7.55	15.7	13.0
8	0.299	9.37	15.6	29.1
10	0.364	11.0	15.5	54.5
12	0.427	12.5	15.5	91.2
90x90x6	0.333	9.80	17.8	15.0
8	0.431	12.2	17.6	33.3
10	0.526	14.4	17.5	62.4
12	0.617	16.4	17.4	104
100x100x8	0.599	15.5	19.6	37.6
10	0.730	18.3	19.5	70.3
12	0.857	20.9	19.4	118
15	1.04	24.4	19.3	221
120x120x8	1.05	23.1	23.7	45.4
10	1.29	27.5	23.6	85.1
12	1.52	31.6	23.5	143
15	1.85	37.1	23.3	269
150x150x10	2.58	45.1	29.7	110
12	3.03	52.0	29.5	184
15	3.70	61.6	29.3	347
18	4.35	70.5	29.2	584
200x200x16	9.60	123	39.4	564
18	10.7	135	39.3	790
20	11.7	146	39.2	1070
24	13.8	167	39.0	1800

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