Properties - Hot Finished Square Hollow Sections

Welcome to our Hot Finished Square Hollow Section properties page! Here you'll find properties for all UK Hot Finished Square 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.

You can also purchase all our CAD data in one easy download, containing the shapes as individual files or AutoCAD Design Center files! Click here to visit our Shop.

Section Reference	Ratio for Local Buckling	Second Moment of Area	Radius of Gyration	Elastic Modulus	Plastic Modulus	Torsional Constants		Surface Area
								Per Metre	Per Tonne
	d/t⁽¹⁾	I cm⁴	r cm	Z cm³	S cm³	J cm⁴	C cm³	m²	m²
40x40x3.0	10.3	9.78	1.5	4.89	5.97	15.7	7.1	0.152	44.7
40x40x3.2	9.5	10.2	1.49	5.11	6.28	16.5	7.42	0.152	42
40x40x4.0	7	11.8	1.45	5.91	7.44	19.5	8.54	0.15	34.1
40x40x5.0	5	13.4	1.41	6.68	8.66	22.5	9.6	0.147	27.8
50x50x3.0	13.7	20.2	1.91	8.08	9.7	32.1	11.8	0.192	44.2
50x50x3.2	12.6	21.2	1.9	8.49	10.2	33.8	12.4	0.192	41.5
50x50x4.0	9.5	25	1.86	9.99	12.3	40.4	14.5	0.19	33.6
50x50x5.0	7	28.9	1.82	11.6	14.5	47.6	16.7	0.187	27.3
50x50x6.3	4.94	32.8	1.76	13.1	17	55.2	18.8	0.184	22.1
60x60x3.0	17	36.2	2.32	12.1	14.3	56.9	17.7	0.232	43.9
60x60x3.2	15.8	38.2	2.31	12.7	15.2	60.2	18.6	0.232	41.2
60x60x4.0	12	45.4	2.27	15.1	18.3	72.5	22	0.23	33.3
60x60x5.0	9	53.3	2.23	17.8	21.9	86.4	25.7	0.227	27
60x60x6.3	6.52	61.6	2.17	20.5	26	102	29.6	0.224	21.7
60x60x8.0	4.5	69.7	2.09	23.2	30.4	118	33.4	0.219	17.5
70x70x3.6	16.4	68.6	2.7	19.6	23.3	108	28.7	0.271	36.6
70x70x5.0	11	88.5	2.64	25.3	30.8	142	36.8	0.267	26.7
70x70x6.3	8.11	104	2.58	29.7	36.9	169	42.9	0.264	21.5
70x70x8.0	5.75	120	2.5	34.2	43.8	200	49.2	0.259	17.3
80x80x3.6	19.2	105	3.11	26.2	31	164	38.5	0.311	36.4
80x80x4.0	17	114	3.09	28.6	34	180	41.9	0.31	32.9
80x80x5.0	13	137	3.05	34.2	41.1	217	49.8	0.307	26.6
80x80x6.3	9.7	162	2.99	40.5	49.7	262	58.7	0.304	21.3
80x80x8.0	7	189	2.91	47.3	59.5	312	68.3	0.299	17.1
90x90x3.6	22	152	3.52	33.8	39.7	237	49.7	0.351	36.3
90x90x4.0	19.5	166	3.5	37	43.6	260	54.2	0.35	32.8
90x90x5.0	15	200	3.45	44.4	53	316	64.8	0.347	26.4
90x90x6.3	11.3	238	3.4	53	64.3	382	77	0.344	21.2
90x90x8.0	8.25	281	3.32	62.6	77.6	459	90.5	0.339	16.9
100x100x4.0	22	232	3.91	46.4	54.4	361	68.2	0.39	32.7
100x100x5.0	17	279	3.86	55.9	66.4	439	81.8	0.387	26.3
100x100x6.3	12.9	336	3.8	67.1	80.9	534	97.8	0.384	21.1
100x100x8.0	9.5	400	3.73	79.9	98.2	646	116	0.379	16.8
100x100x10.0	7	462	3.64	92.4	116	761	133	0.374	13.6
120x120x5.0	21	498	4.68	83	97.6	777	122	0.467	26.2
120x120x6.3	16	603	4.62	100	120	950	147	0.464	20.9
120x120x8.0	12	726	4.55	121	146	1160	176	0.459	16.6
120x120x10.0	9	852	4.46	142	175	1380	206	0.454	13.5
120x120x12.5	6.6	982	4.34	164	207	1620	236	0.448	11
140x140x5.0	25	807	5.5	115	135	1250	170	0.547	26.1
140x140x6.3	19.2	984	5.44	141	166	1540	206	0.544	20.8
140x140x8.0	14.5	1200	5.36	171	204	1890	249	0.539	16.5
140x140x10.0	11	1420	5.27	202	246	2270	294	0.534	13.4
140x140x12.5	8.2	1650	5.16	236	293	2700	342	0.528	10.8
150x150x5.0	27	1000	5.9	134	156	1550	197	0.587	26
150x150x6.3	20.8	1220	5.85	163	192	1910	240	0.584	20.8
150x150x8.0	15.8	1490	5.77	199	237	2350	291	0.579	16.5
150x150x10.0	12	1770	5.68	236	286	2830	344	0.574	13.3
150x150x12.5	9	2080	5.57	277	342	3380	402	0.568	10.8
160x160x5.0	29	1230	6.31	153	178	1890	226	0.627	26
160x160x6.3	22.4	1500	6.26	187	220	2330	275	0.624	20.7
160x160x8.0	17	1830	6.18	229	272	2880	335	0.619	16.5
160x160x10.0	13	2190	6.09	273	329	3480	398	0.614	13.3
160x160x12.5	9.8	2580	5.98	322	395	4160	467	0.608	10.7
160x160x14.2	8.27	2810	5.9	351	436	4580	508	0.603	9.53
180x180x6.3	25.6	2170	7.07	241	281	3360	355	0.704	20.7
180x180x8.0	19.5	2660	7	296	349	4160	434	0.699	16.4
180x180x10.0	15	3190	6.91	355	424	5050	518	0.694	13.2
180x180x12.5	11.4	3790	6.8	421	511	6070	613	0.688	10.7
180x180x14.2	9.68	4150	6.72	462	566	6710	670	0.683	9.46
180x180x16.0	8.25	4500	6.64	500	621	7340	724	0.679	8.46
200x200x5.0	37	2450	7.95	245	283	3760	362	0.787	25.9
200x200x6.3	28.7	3010	7.89	301	350	4650	444	0.784	20.6
200x200x8.0	22	3710	7.81	371	436	5780	545	0.779	16.3
200x200x10.0	17	4470	7.72	447	531	7030	655	0.774	13.2
200x200x12.5	13	5340	7.61	534	643	8490	778	0.768	10.6
200x200x14.2	11.1	5870	7.54	587	714	9420	854	0.763	9.41
200x200x16.0	9.5	6390	7.46	639	785	10300	927	0.759	8.4
250x250x6.3	36.7	6010	9.93	481	556	9240	712	0.984	20.5
250x250x8.0	28.3	7460	9.86	596	694	11500	880	0.979	16.3
250x250x10.0	22	9060	9.77	724	851	14100	1070	0.974	13.1
250x250x12.5	17	10900	9.66	873	1040	17200	1280	0.968	10.5
250x250x14.2	14.6	12100	9.58	967	1160	19100	1410	0.963	9.31
250x250x16.0	12.6	13300	9.5	1060	1280	21100	1550	0.959	8.31
260x260x6.3	38.3	6790	10.3	522	603	10400	773	1.02	20.5
260x260x8.0	29.5	8420	10.3	648	753	13000	956	1.02	16.2
260x260x10.0	23	10200	10.2	788	924	15900	1160	1.01	13.1
260x260x12.5	17.8	12400	10.1	951	1130	19400	1390	1.01	10.5
260x260x14.2	15.3	13700	9.99	1060	1260	21700	1540	1	9.3
260x260x16.0	13.3	15100	9.91	1160	1390	23900	1690	0.999	8.29
300x300x6.3	44.6	10500	12	703	809	16100	1040	1.18	20.5
300x300x8.0	34.5	13100	11.9	875	1010	20200	1290	1.18	16.2
300x300x10.0	27	16000	11.8	1070	1250	24800	1580	1.17	13
300x300x12.5	21	19400	11.7	1300	1530	30300	1900	1.17	10.5
300x300x14.2	18.1	21600	11.6	1440	1710	33900	2110	1.16	9.25
300x300x16.0	15.8	23900	11.5	1590	1900	37600	2330	1.16	8.25
350x350x8.0	40.8	21100	13.9	1210	1390	32400	1790	1.38	16.2
350x350x10.0	32	25900	13.9	1480	1720	39900	2190	1.37	13
350x350x12.5	25	31500	13.7	1800	2110	48900	2650	1.37	10.4
350x350x14.2	21.6	35200	13.7	2010	2360	54900	2960	1.36	9.21
350x350x16.0	18.9	38900	13.6	2230	2630	61000	3260	1.36	8.2
400x400x10.0	37	39100	15.9	1960	2260	60100	2900	1.57	12.9
400x400x12.5	29	47800	15.8	2390	2780	73900	3530	1.57	10.4
400x400x14.2	25.2	53500	15.7	2680	3130	83000	3940	1.56	9.18
400x400x16.0	22	59300	15.6	2970	3480	92400	4360	1.56	8.17
400x400x20.0	17	71500	15.4	3580	4250	112000	5240	1.55	6.58