Properties - Cold-Formed Rectangular Hollow Sections

Welcome to our Cold-Formed Rectangular Hollow Section properties page! Here you'll find properties for all UK Cold-Formed Rectangular Hollow Section steel sections described by the Steelwork Design Guide to BS5950-1:2000, Volume 1, Section Properties, Member Capacities, 7th Edition (also known as The Blue Book). Sort the table below according to any property and select a CAD file to download using the reference links in the left-most column.

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Section Reference	Ratios for Local Buckling		Second Moment of Area		Radius of Gyration		Elastic Modulus		Plastic Modulus		Torsional Constants		Surface Area
			Axis x-x	Axis y-y	Axis x-x	Axis y-y	Axis x-x	Axis yy	Axis x-x	Axis y-y			Per Metre	Per Tonne
	d/t⁽¹⁾	b/t⁽¹⁾	cm⁴	cm⁴	cm	cm	cm³	cm³	cm³	cm³	J cm⁴	C cm³	m²	m²
50x25x2.0	20	7.5	8.38	2.81	1.75	1.01	3.35	2.25	4.26	2.62	7.06	3.92	0.143	66.6
50x25x3.0	11.7	3.33	11.2	3.67	1.69	0.969	4.47	2.93	5.86	3.56	9.64	5.18	0.14	45.5
50x30x2.5	15	7	11.3	5.05	1.77	1.19	4.52	3.37	5.7	3.98	11.7	5.72	0.151	53.7
50x30x3.0	11.7	5	12.8	5.7	1.75	1.16	5.13	3.8	6.57	4.58	13.5	6.49	0.15	45.3
50x30x4.0	7.5	2.5	15.3	6.69	1.69	1.12	6.1	4.46	8.05	5.58	16.5	7.71	0.146	34.8
60x30x3.0	15	5	20.5	6.8	2.06	1.19	6.83	4.53	8.82	5.39	17.5	7.95	0.17	45
60x30x4.0	10	2.5	24.7	8.06	2	1.14	8.23	5.37	10.9	6.62	21.5	9.52	0.166	34.5
60x40x3.0	15	8.33	25.4	13.4	2.17	1.58	8.46	6.72	10.5	7.94	29.3	11.2	0.19	44.7
60x40x4.0	10	5	31	16.3	2.11	1.53	10.3	8.14	13.2	9.89	36.7	13.7	0.186	34.2
60x40x5.0	7	3	35.3	18.4	2.06	1.48	11.8	9.21	15.4	11.5	42.8	15.6	0.183	27.9
70x40x3.0	18.3	8.33	37.3	15.5	2.49	1.61	10.7	7.75	13.4	9.05	36.5	13.2	0.21	44.5
70x40x4.0	12.5	5	46	18.9	2.44	1.56	13.1	9.44	16.8	11.3	45.8	16.2	0.206	33.9
70x50x3.0	18.3	11.7	44.1	26.1	2.58	1.99	12.6	10.4	15.4	12.2	53.6	17.1	0.23	44.3
70x50x4.0	12.5	7.5	54.7	32.2	2.53	1.94	15.6	12.9	19.5	15.4	68.1	21.2	0.226	33.7
80x40x3.0	21.7	8.33	52.3	17.6	2.81	1.63	13.1	8.78	16.5	10.2	43.9	15.3	0.23	44.3
80x40x4.0	15	5	64.8	21.5	2.75	1.59	16.2	10.7	20.9	12.8	55.2	18.8	0.226	33.7
80x40x5.0	11	3	75.1	24.6	2.69	1.54	18.8	12.3	24.7	15	65	21.7	0.223	27.4
80x50x3.0	21.7	11.7	61.1	29.4	2.91	2.02	15.3	11.8	18.8	13.6	65	19.7	0.25	44.1
80x50x4.0	15	7.5	76.4	36.5	2.86	1.98	19.1	14.6	24	17.2	82.7	24.6	0.246	33.6
80x50x5.0	11	5	89.2	42.3	2.8	1.93	22.3	16.9	28.5	20.5	98.4	28.7	0.243	27.2
80x60x3.0	21.7	15	70	44.9	3	2.4	17.5	15	21.2	17.4	88.3	24.1	0.27	44
80x60x4.0	15	10	87.9	56.1	2.94	2.35	22	18.7	27	22.1	113	30.3	0.266	33.4
80x60x5.0	11	7	103	65.7	2.89	2.31	25.8	21.9	32.2	26.4	136	35.7	0.263	27.1
90x50x3.0	25	11.7	81.9	32.7	3.24	2.05	18.2	13.1	22.6	15	76.7	22.4	0.27	44
90x50x4.0	17.5	7.5	103	40.7	3.18	2	22.8	16.3	28.8	19.1	97.7	28	0.266	33.4
90x50x5.0	13	5	121	47.4	3.12	1.96	26.8	18.9	34.4	22.7	116	32.7	0.263	27.1
100x40x3.0	28.3	8.33	92.3	21.7	3.44	1.67	18.5	10.8	23.7	12.4	59	19.4	0.27	44
100x40x4.0	20	5	116	26.7	3.38	1.62	23.1	13.3	30.3	15.7	74.5	24	0.266	33.4
100x40x5.0	15	3	136	30.8	3.31	1.58	27.1	15.4	36.1	18.5	87.9	27.9	0.263	27.1
100x50x3.0	28.3	11.7	106	36.1	3.56	2.07	21.3	14.4	26.7	16.4	88.6	25	0.29	43.9
100x50x4.0	20	7.5	134	44.9	3.5	2.03	26.8	18	34.1	20.9	113	31.3	0.286	33.3
100x50x5.0	15	5	158	52.5	3.44	1.98	31.6	21	40.8	25	135	36.8	0.283	27
100x50x6.0	11.7	3.33	179	58.7	3.38	1.94	35.8	23.5	46.9	28.5	154	41.4	0.279	22.8
100x60x3.0	28.3	15	121	54.6	3.66	2.46	24.1	18.2	29.6	20.8	122	30.6	0.31	43.8
100x60x3.5	23.6	12.1	137	61.9	3.63	2.44	27.4	20.6	33.8	23.8	139	34.8	0.308	37.7
100x60x4.0	20	10	153	68.7	3.6	2.42	30.5	22.9	37.9	26.6	156	38.7	0.306	33.2
100x60x5.0	15	7	181	80.8	3.55	2.37	36.2	26.9	45.6	31.9	188	45.8	0.303	26.9
100x60x6.0	11.7	5	205	91.2	3.49	2.33	41.1	30.4	52.5	36.6	216	51.9	0.299	22.7
100x80x3.0	28.3	21.7	149	106	3.82	3.22	29.8	26.4	35.4	30.4	196	41.9	0.35	43.6
100x80x4.0	20	15	189	134	3.77	3.17	37.9	33.5	45.6	39.2	254	53.4	0.346	33
100x80x5.0	15	11	226	160	3.72	3.12	45.2	39.9	55.1	47.2	308	63.7	0.343	26.7
120x40x3.0	35	8.33	148	25.8	4.05	1.69	24.7	12.9	32.2	14.6	74.6	23.5	0.31	43.8
120x40x4.0	25	5	187	31.9	3.99	1.65	31.1	15.9	41.2	18.5	94.2	29.2	0.306	33.2
120x40x5.0	19	3	221	36.9	3.92	1.6	36.8	18.5	49.4	22	111	34.1	0.303	26.9
120x60x3.0	35	15	189	64.4	4.3	2.51	31.5	21.5	39.2	24.2	156	37.1	0.35	43.6
120x60x3.5	29.3	12.1	216	73.1	4.28	2.49	35.9	24.4	44.9	27.7	179	42.2	0.348	37.6
120x60x4.0	25	10	241	81.2	4.25	2.47	40.1	27.1	50.5	31.1	201	47	0.346	33
120x60x5.0	19	7	287	96	4.19	2.42	47.8	32	60.9	37.4	242	55.8	0.343	26.7
120x60x6.0	15	5	328	109	4.13	2.38	54.7	36.3	70.6	43.1	280	63.6	0.339	22.5
120x80x4.0	25	15	295	157	4.44	3.24	49.1	39.3	59.8	45.2	331	64.9	0.386	32.9
120x80x5.0	19	11	353	188	4.39	3.2	58.9	46.9	72.4	54.7	402	77.8	0.383	26.6
120x80x6.0	15	8.33	406	215	4.33	3.15	67.7	53.8	84.3	63.5	469	89.4	0.379	22.3
120x80x8.0	10	5	476	252	4.18	3.04	79.3	62.9	102	76.9	584	108	0.366	17.1
140x80x3.0	41.7	21.7	334	141	5.15	3.35	47.8	35.3	58.2	39.6	317	59.7	0.43	43.4
140x80x4.0	30	15	430	180	5.1	3.3	61.4	45.1	75.5	51.3	412	76.5	0.426	32.8
140x80x5.0	23	11	517	216	5.04	3.26	73.9	54	91.8	62.2	501	91.8	0.423	26.5
140x80x6.0	18.3	8.33	597	248	4.98	3.21	85.3	62	107	72.4	584	106	0.419	22.2
140x80x8.0	12.5	5	708	293	4.82	3.1	101	73.3	131	88.4	731	129	0.406	17
140x80x10.0	9	3	804	330	4.69	3.01	115	82.6	152	103	851	147	0.397	13.8
150x100x3.0	45	28.3	461	248	5.65	4.15	61.4	49.5	73.5	55.8	507	81.4	0.49	43.3
150x100x4.0	32.5	20	595	319	5.6	4.1	79.3	63.7	95.7	72.5	662	105	0.486	32.7
150x100x5.0	25	15	719	384	5.55	4.05	95.9	76.8	117	88.3	809	127	0.483	26.3
150x100x6.0	20	11.7	835	444	5.5	4.01	111	88.8	137	103	948	147	0.479	22.1
150x100x8.0	13.8	7.5	1010	536	5.35	3.9	134	107	169	128	1210	182	0.466	16.8
150x100x10.0	10	5	1160	614	5.22	3.8	155	123	199	150	1430	211	0.457	13.7
160x80x4.0	35	15	598	204	5.74	3.35	74.7	50.9	92.9	57.4	494	88	0.466	32.7
160x80x5.0	27	11	722	244	5.68	3.3	90.2	61	113	69.7	601	106	0.463	26.4
160x80x6.0	21.7	8.33	836	281	5.62	3.26	105	70.2	132	81.3	702	122	0.459	22.1
160x80x8.0	15	5	1000	335	5.46	3.16	125	83.7	163	100	882	150	0.446	16.9
180x80x4.0	40	15	802	227	6.37	3.39	89.1	56.7	112	63.5	578	99.6	0.506	32.7
180x80x5.0	31	11	971	272	6.31	3.34	108	68.1	137	77.2	704	120	0.503	26.3
180x80x6.0	25	8.33	1130	314	6.25	3.3	125	78.5	160	90.2	823	139	0.499	22.1
180x80x8.0	17.5	5	1360	377	6.08	3.2	151	94.1	198	111	1040	170	0.486	16.8
180x80x10.0	13	3	1570	429	5.94	3.1	174	107	234	131	1210	196	0.477	13.6
180x100x4.0	40	20	926	374	6.59	4.18	103	74.8	126	84	854	127	0.546	32.6
180x100x5.0	31	15	1120	452	6.53	4.14	125	90.4	154	103	1050	154	0.543	26.2
180x100x6.0	25	11.7	1310	524	6.48	4.1	146	105	181	120	1230	179	0.539	22
180x100x8.0	17.5	7.5	1600	637	6.32	3.99	178	127	226	150	1570	222	0.526	16.7
180x100x10.0	13	5	1860	736	6.19	3.89	207	147	268	177	1860	260	0.517	13.6
200x100x4.0	45	20	1200	411	7.23	4.23	120	82.2	148	91.7	985	142	0.586	32.5
200x100x5.0	35	15	1460	497	7.17	4.19	146	99.4	181	112	1210	172	0.583	26.2
200x100x6.0	28.3	11.7	1700	577	7.12	4.14	170	115	213	132	1420	200	0.579	21.9
200x100x8.0	20	7.5	2090	705	6.95	4.04	209	141	267	165	1810	250	0.566	16.7
200x100x10.0	15	5	2440	818	6.82	3.94	244	164	318	195	2150	292	0.557	13.5
200x120x4.0	45	25	1350	618	7.43	5.02	135	103	164	115	1350	172	0.626	32.5
200x120x5.0	35	19	1650	750	7.37	4.97	165	125	201	141	1650	210	0.623	26.1
200x120x6.0	28.3	15	1930	874	7.32	4.93	193	146	237	166	1950	245	0.619	21.9
200x120x8.0	20	10	2390	1080	7.17	4.82	239	180	298	209	2510	308	0.606	16.6
200x120x10.0	15	7	2810	1260	7.04	4.72	281	210	356	250	3010	364	0.597	13.4
200x150x4.0	45	32.5	1580	1020	7.67	6.16	158	136	187	154	1940	219	0.686	32.4
200x150x5.0	35	25	1940	1250	7.62	6.11	193	166	230	189	2390	267	0.683	26.1
200x150x6.0	28.3	20	2270	1460	7.56	6.06	227	194	271	223	2830	313	0.679	21.8
200x150x8.0	20	13.8	2830	1820	7.43	5.95	283	242	344	283	3670	396	0.666	16.5
200x150x10.0	15	10	3350	2140	7.31	5.85	335	286	413	339	4430	471	0.657	13.4
250x150x5.0	45	25	3300	1510	9.28	6.27	264	201	320	225	3290	337	0.783	26
250x150x6.0	36.7	20	3890	1770	9.23	6.23	311	236	378	266	3890	396	0.779	21.8
250x150x8.0	26.3	13.8	4890	2220	9.08	6.12	391	296	482	340	5050	504	0.766	16.5
250x150x10.0	20	10	5830	2630	8.96	6.02	466	351	582	409	6120	602	0.757	13.3
250x150x12.0	15.8	7.5	6460	2930	8.77	5.9	517	390	658	463	7090	684	0.738	11.2
250x150x12.5	15	7	6630	3000	8.73	5.87	531	400	678	477	7320	704	0.736	10.8
300x100x6.0	45	11.7	4780	842	10.2	4.3	318	168	411	188	2400	306	0.779	21.8
300x100x8.0	32.5	7.5	5980	1050	10	4.2	399	209	523	238	3080	385	0.766	16.5
300x100x10.0	25	5	7110	1220	9.9	4.11	474	245	631	285	3680	455	0.757	13.3
300x100x12.5	19	3	8010	1370	9.59	3.97	534	275	732	330	4290	521	0.736	10.8
300x200x6.0	45	28.3	7370	3960	11.3	8.29	491	396	588	446	8120	651	0.979	21.6
300x200x8.0	32.5	20	9390	5040	11.2	8.19	626	504	757	574	10600	838	0.966	16.3
300x200x10.0	25	15	11300	6060	11.1	8.09	754	606	921	698	13000	1010	0.957	13.2
300x200x12.0	20	11.7	12800	6850	10.9	7.96	853	685	1060	801	15200	1170	0.938	11.1
300x200x12.5	19	11	13200	7060	10.8	7.94	879	706	1090	828	15800	1200	0.936	10.6
400x200x8.0	45	20	19000	6520	14.4	8.45	949	652	1170	728	15800	1130	1.17	16.3
400x200x10.0	35	15	23000	7860	14.3	8.36	1150	786	1430	888	19400	1370	1.16	13.1
400x200x12.0	28.3	11.7	26200	8980	14.1	8.24	1310	898	1660	1030	22800	1590	1.14	11
400x200x12.5	27	11	27100	9260	14.1	8.22	1360	926	1710	1060	23600	1640	1.14	10.6
450x250x8.0	51.3	26.3	29300	11900	16.5	10.5	1300	953	1590	1060	27200	1630	1.37	16.2
450x250x10.0	40	20	35700	14500	16.4	10.4	1590	1160	1950	1300	33500	1980	1.36	13
450x250x12.0	32.5	15.8	41100	16700	16.2	10.3	1830	1330	2260	1520	39600	2310	1.34	10.9
450x250x12.5	31	15	42500	17200	16.2	10.3	1890	1380	2350	1570	41100	2390	1.34	10.5
500x300x8.0	57.5	32.5	42800	19600	18.6	12.6	1710	1310	2060	1460	42800	2200	1.57	16.2
500x300x10.0	45	25	52300	23900	18.5	12.5	2090	1600	2540	1790	52700	2690	1.56	13
500x300x12.0	36.7	20	60600	27700	18.3	12.4	2420	1850	2960	2090	62600	3160	1.54	10.9
500x300x12.5	35	19	62700	28700	18.3	12.4	2510	1910	3070	2170	65000	3270	1.54	10.5