Beams, channels & columns · Size & tolerance table

UC British universal columns (BS 4-1)

Standard: BS 4-1:2005 (dimensions) · EN 10034 (tolerances)

Universal columns are the British H-sections, with a flange width close to the depth so that the section is stiff about both axes. They are designated serial depth × width × mass per metre, for example UC 254 × 254 × 89, and are used for columns and as heavy beams where depth is limited.

Universal column cross-section with height h, flange width b, web thickness tw, flange thickness tf and root radius r

UC 152 to UC 356 — dimensions and section properties

Section	Dimensions									Surface	Strong axis y-y					Weak axis z-z				Torsion
Designation	G kg/m	h mm	b mm	tw mm	tf mm	r mm	A cm²	hi mm	d mm	AL m²/m	Iy cm⁴	Wel,y cm³	Wpl,y cm³	iy cm	Avz cm²	Iz cm⁴	Wel,z cm³	Wpl,z cm³	iz cm	It cm⁴	Iw ×10³ cm⁶
UC 152 × 152 × 23	23.0	152.4	152.2	5.8	6.8	7.6	29.25	138.8	123.6	0.889	1250	164	182	6.54	9.974	399.9	52.55	80.16	3.7	4.86	21.18
UC 152 × 152 × 30	30.0	157.6	152.9	6.5	9.4	7.6	38.26	138.8	123.6	0.901	1748	221.8	247.7	6.76	11.56	560.5	73.31	111.6	3.83	10.67	30.75
UC 152 × 152 × 37	37.0	161.8	154.4	8	11.5	7.6	47.11	138.8	123.6	0.912	2210	273.2	308.8	6.85	14.27	706.2	91.48	139.6	3.87	19.49	39.84
UC 203 × 203 × 46	46.1	203.2	203.6	7.2	11	10.2	58.73	181.2	160.8	1.189	4568	449.6	497.4	8.82	16.98	1548	152.1	230.9	5.13	22.34	142.9
UC 203 × 203 × 52	52.0	206.2	204.3	7.9	12.5	10.2	66.28	181.2	160.8	1.196	5259	510.1	567.4	8.91	18.75	1778	174	264.2	5.18	31.97	166.6
UC 203 × 203 × 60	60.0	209.6	205.8	9.4	14.2	10.2	76.37	181.2	160.8	1.206	6125	584.4	656.1	8.96	22.16	2065	200.6	305.3	5.2	47.78	196.9
UC 203 × 203 × 71	71.0	215.8	206.4	10	17.3	10.2	90.43	181.2	160.8	1.220	7618	706	798.8	9.18	24.27	2537	245.9	373.7	5.3	80.63	249.7
UC 203 × 203 × 86	86.1	222.2	209.1	12.7	20.5	10.2	109.6	181.2	160.8	1.238	9449	850.5	976.7	9.28	30.69	3127	299.1	456.2	5.34	138.3	317.7
UC 254 × 254 × 73	73.1	254.1	254.6	8.6	14.2	12.7	93.1	225.7	200.3	1.488	11410	897.9	992.1	11.07	25.62	3908	307	465.4	6.48	57.74	562
UC 254 × 254 × 89	88.9	260.3	256.3	10.3	17.3	12.7	113.3	225.7	200.3	1.503	14270	1096	1224	11.22	30.81	4857	379	575.3	6.55	102.7	716.6
UC 254 × 254 × 107	107.1	266.7	258.8	12.8	20.5	12.7	136.4	225.7	200.3	1.521	17510	1313	1484	11.33	38.11	5928	458.1	697	6.59	173.9	897.5
UC 254 × 254 × 132	132.0	276.3	261.3	15.3	25.3	12.7	168.1	225.7	200.3	1.545	22530	1631	1869	11.58	46.21	7531	576.4	878.4	6.69	321.5	1185
UC 254 × 254 × 167	167.1	289.1	265.2	19.2	31.7	12.7	212.9	225.7	200.3	1.579	30000	2075	2424	11.87	58.86	9870	744.3	1137	6.81	633.8	1632
UC 305 × 305 × 97	96.9	307.9	305.3	9.9	15.4	15.2	123.4	277.1	246.7	1.791	22250	1445	1592	13.42	35.62	7308	478.7	726.1	7.69	91.8	1562
UC 305 × 305 × 118	117.9	314.5	307.4	12	18.7	15.2	150.2	277.1	246.7	1.809	27670	1760	1958	13.57	43.16	9059	589.4	895.4	7.77	162.3	1980
UC 305 × 305 × 137	136.9	320.5	309.2	13.8	21.7	15.2	174.4	277.1	246.7	1.824	32810	2048	2297	13.72	49.81	10700	692.1	1053	7.83	251.1	2386
UC 305 × 305 × 158	158.1	327.1	311.2	15.8	25	15.2	201.4	277.1	246.7	1.841	38750	2369	2680	13.87	57.32	12570	807.8	1230	7.9	381.6	2865
UC 305 × 305 × 198	198.1	339.9	314.5	19.1	31.4	15.2	252.4	277.1	246.7	1.874	50900	2995	3440	14.2	70.45	16300	1037	1581	8.04	741.2	3873
UC 305 × 305 × 240	240.0	352.5	318.4	23	37.7	15.2	305.8	277.1	246.7	1.907	64200	3643	4247	14.49	85.85	20310	1276	1951	8.15	1287	5025
UC 305 × 305 × 283	282.9	365.3	322.2	26.8	44.1	15.2	360.4	277.1	246.7	1.940	78870	4318	5105	14.79	101.5	24630	1529	2342	8.27	2062	6341
UC 356 × 368 × 129	129.0	355.6	368.6	10.4	17.5	15.2	164.3	320.6	290.2	2.139	40250	2264	2479	15.65	42.47	14610	792.8	1199	9.43	152.7	4174
UC 356 × 368 × 153	152.9	362	370.5	12.3	20.7	15.2	194.8	320.6	290.2	2.155	48590	2684	2965	15.79	50.26	17550	947.5	1435	9.49	251.2	5110
UC 356 × 368 × 177	177.0	368.2	372.6	14.4	23.8	15.2	225.5	320.6	290.2	2.172	57120	3103	3455	15.91	58.81	20530	1102	1671	9.54	383.5	6084
UC 356 × 368 × 202	201.9	374.6	374.7	16.5	27	15.2	257.2	320.6	290.2	2.189	66260	3538	3972	16.05	67.55	23690	1264	1920	9.6	561.4	7151
UC 356 × 406 × 235	235.1	381	394.8	18.4	30.2	15.2	299	320.6	290.2	2.278	79080	4151	4687	16.25	75.71	30990	1570	2383	10.2	817.7	9529
UC 356 × 406 × 287	287.1	393.6	399	22.6	36.5	15.2	365.7	320.6	290.2	2.312	99880	5075	5812	16.53	93.78	38680	1939	2949	10.28	1455	12320
UC 356 × 406 × 340	339.9	406.4	403	26.6	42.9	15.2	433	320.6	290.2	2.346	122500	6031	6999	16.82	111.7	46850	2325	3544	10.4	2370	15460
UC 356 × 406 × 393	393.0	419	407	30.6	49.2	15.2	500.6	320.6	290.2	2.379	146600	6998	8222	17.11	130.1	55370	2721	4154	10.52	3592	18900
UC 356 × 406 × 467	467.0	436.6	412.2	35.8	58	15.2	594.9	320.6	290.2	2.424	183000	8383	10000	17.54	155.2	67830	3291	5034	10.68	5896	24260
UC 356 × 406 × 551	551.0	455.6	418.5	42.1	67.5	15.2	701.9	320.6	290.2	2.475	226900	9962	12080	17.98	185.9	82670	3951	6058	10.85	9402	31050
UC 356 × 406 × 634	633.9	474.6	424	47.6	77	15.2	807.5	320.6	290.2	2.524	274800	11580	14240	18.45	214.6	98130	4629	7108	11.02	13990	38660

Notes

Section properties are calculated for the nominal dimensions. Mass is for a density of 7.85 kg/dm³.
The UC 356 × 406 sizes are the heaviest British columns and are rolled by few mills.