Rectangular Hollow Sections

Rectangular Steel Tubes

Rectangular hollow sections or rec tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel.

In order to form the rectangular steel section the appropriate mother tube, a round steel tube, has to be formed first. From a round tube rolls are used that progressively press the round tube into a rectangular hollow section. This is all done inline. For example: A round tube with an outside diameter of 101.6 is pressed into an 80x80 square tube.

Square and rectangular steel tubes have the advantage of being stronger in bending while a round hollow section has more stiffness in twisting

Rectangular Hollow Section Moment of Inertia Calculator:

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Rectangular hollow sections dimensions and properties
Designation hbt	m	A	J
mm	kg/m	10^3mm^2	10^6mm^4
60x40x3.0	4.48	0.533	0.293
3.5	5.18	0.609	0.331
4.0	5.87	0.681	0.365
4.5	6.55	0.750	0.396
76x38x3.0	5.18	0.617	0.374
3.5	6.00	0.707	0.422
4.0	6.81	0.793	0.466
4.5	7.60	0.876	0.506
76x50x3.0	5.70	0.689	0.606
3.5	6.60	0.791	0.690
4.0	7.50	0.889	0.768
4.5	8.38	0.984	0.841
100x50x3.0	6.81	0.833	0.889
3.5	7.90	0.959	1.01
4.0	8.98	1.08	1.13
4.5	10.0	1.20	1.24
5.0	11.1	1.31	1.35
120x60x3.0	8.23	1.01	1.57
3.5	9.56	1.17	1.80
4.0	10.9	1.32	2.02
4.5	12.2	1.47	2.23
5.0	13.5	1.61	2.43
6.0	16.0	1.89	2.79
160x80x3.0	11.1	1.37	3.82
3.5	12.9	1.59	4.40
4.0	14.6	1.80	4.96
4.5	16.4	2.01	5.50
5.0	18.2	2.21	6.03
6.0	21.7	2.61	7.04
203x102x3.5	16.4	2.04	9.23
4.5	21.0	2.59	11.6
6.0	27.8	3.39	15.0
8.0	36.6	4.47	18.5
10.0	45.3	5.32	22.0
200x150x3.5	18.6	2.36	17.2
4.5	23.8	3.00	21.8
6.0	31.5	3.93	28.4
8.0	41.6	5.12	36.6
10.0	51.6	6.26	44.3
250x100x3.5	18.6	2.36	11.7
4.5	23.8	3.00	14.8
6.0	31.5	3.93	19.1
8.0	41.6	5.12	24.4
10.0	51.6	6.26	29.1
300x150x4.5	29.8	3.90	38.3
6.0	39.5	5.13	50.1
8.0	52.3	6.72	64.9
10.0	64.9	8.26	78.8
320x220x4.5	35.5	4.71	79.4
6.0	47.1	6.12	104
8.0	62.3	8.16	136
10.0	77.4	10.1	167
340x200x4.5	35.5	4.71	73.9
6.0	47.1	6.21	97.0
8.0	62.3	8.16	127
10.0	77.4	10.1	155

Rectangular hollow sections dimensions and properties (continued)
Designation hbt	I	Ze	Zpl	r	I	Ze	Zpl	r
mm	10^6mm^4	10^3mm^3	10^3mm^3	mm	10^6mm^4	10^3mm^3	10^3mm^3	mm
60x40x3.0	0.247	8.23	10.3	21.5	0.131	6.56	7.79	15.7
3.5	0.247	9.13	11.6	21.2	0.145	7.26	8.75	15.4
4.0	0.297	9.91	12.7	20.9	0.157	7.87	9.62	15.2
4.5	0.317	10.6	13.8	20.6	0.167	8.37	10.4	14.9
76x38x3.0	0.432	11.4	14.5	26.5	0.146	7.67	8.95	15.4
3.5	0.482	12.7	16.4	26.1	0.162	8.52	10.1	15.1
4.0	0.527	13.9	18.1	25.8	0.176	9.26	11.1	14.9
4.5	0.566	14.9	19.7	25.4	0.188	9.90	12.1	14.7
76x50x3.0	0.528	13.9	17.1	27.7	0.276	11.0	12.9	20.0
3.5	0.593	15.6	19.4	27.4	0.309	12.4	14.6	19.8
4.0	0.652	17.1	21.6	27.1	0.339	13.6	16.2	19.5
4.5	0.704	18.5	23.6	26.8	0.366	14.6	17.6	19.3
100x50x3.0	1.05	20.9	26.3	35.4	0.356	14.2	16.2	20.7
3.5	1.18	23.6	29.9	35.1	0.400	16.0	18.5	20.4
4.0	1.31	26.1	33.4	34.8	0.441	17.6	20.6	20.2
4.5	1.42	28.4	36.7	34.4	0.478	19.1	22.6	20.0
5.0	1.53	30.6	39.8	34.1	0.511	20.4	24.4	19.7
120x60x3.0	1.86	31.1	38.7	42.9	0.637	21.2	24.0	25.1
3.5	2.12	35.3	44.3	42.6	0.721	24.0	27.4	24.8
4.0	2.36	39.3	49.7	42.2	0.800	26.7	30.7	24.6
4.5	2.58	43.0	54.8	41.9	0.873	29.1	33.8	24.4
5.0	2.79	46.5	59.7	41.6	0.941	31.4	36.7	24.1
6.0	3.17	52.8	68.7	40.9	1.06	35.3	42.2	23.7
160x80x3.0	4.59	57.4	70.8	57.8	1.58	39.4	44.0	33.9
3.5	5.25	65.7	81.4	57.5	1.80	45.0	50.5	33.7
4.0	5.89	73.6	91.8	57.2	2.01	50.3	56.8	33.4
4.5	6.50	81.2	102	56.9	2.22	55.4	63.0	33.2
5.0	7.08	88.5	111	56.5	2.41	60.2	68.9	33.0
6.0	8.16	102	130	55.9	2.76	69.0	80.1	32.5
203x102x3.5	11.1	109	134	73.6	3.84	75.3	83.7
4.5	13.8	136	169	73.0	4.77	93.6	105
6.0	17.6	173	218	72.0	6.04	118	135
8.0	21.7	214	277	70.5	7.16	143	167
10.0	25.4	250	333	69.1	8.30	166	198	39
200x150x3.5	13.9	139	164	76.8	8.99	120	135	61.7
4.5	17.4	174	207	76.3	11.2	150	171	61.2
6.0	22.4	224	268	75.4	14.4	192	221	60.5
8.0	28.3	283	344	74.3	18.2	242	283	59.5
10.0	33.5	335	413	73.2	21.4	286	339	58.5
250x100x3.5	18.4	147	184	88.2	4.44	88.8	97.5	43.4
4.5	23.0	184	233	87.5	5.53	111	123	42.9
6.0	29.4	236	301	86.5	7.02	140	158	42.2
8.0	37.1	297	385	85.1	8.75	175	201	41.3
10.0	43.8	351	462	83.7	10.2	204	240	40.4
300x150x4.5	46.4	309	380	109	16.0	213	236	64.1
6.0	60.0	400	495	108	20.6	275	307	63.4
8.0	76.8	512	640	107	26.2	350	396	62.5
10.0	92.1	614	776	106	31.3	417	479	61.5
320x220x4.5	70.1	438	519	122	39.7	361	403	91.8
6.0	91.2	570	679	121	51.5	468	527	91.0
8.0	118	735	884	120	66.3	602	685	90.1
10.0	142	888	1080	119	79.9	726	835	89.1
340x200x4.5	75.9	446	537	127	33.8	338	374	84.7
6.0	98.7	581	703	126	43.8	438	490	84.0
8.0	127	749	914	125	56.3	563	636	83.1
10.0	154	905	1110	124	67.8	678	774	82.1

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