Steel C-Section Channel Sizes Dimensions & Properties

The section reference of a C-section 232mm deep and 1.8mm thick would be 232 C 18. The first 3 digits of the section reference indicate the depth of the section in millimetres (i.e. 232 equals 232mm deep).

The fourth digit is a letter that signifies the profile type (ie C for C-section). The last two digits indicate the material thickness (i.e. 18 equals 1.8mm).

Download our purlin technical manual by logging in to your account.

Sleeves

See C-section Sleeved Side Rail System for C-section sleeve references and weights.

All voestalpine Metsec C-section product is manufactured from pre hot dipped galvanised steel to BS EN10346:2015, Z275 coating and with a minimum yield strength of 450N/mm².

Section Depth mm	A mm	L mm
142 – 262	43	13
302 – 402	53.5	18

Nominal Dimensions						Section Properties
Section Reference	Weight kg/m	Area cm²	Depth mm	Flange mm	t mm	I_y cm⁴	I_z cm⁴	W_el,y cm³	W_el,z cm³	i_y cm	i_z cm	C_y cm	C_z cm	M_y,Rd kNm	M_z,Rd kNm
142 C 13	2.85	3.63	142	60	1.3	119.0	17.6	16.76	4.18	5.69	2.19	7.10	1.80	6.022	1.882
142 C 14	3.06	3.90	142	60	1.4	127.7	18.8	17.99	4.48	5.68	2.18	7.10	1.80	6.790	2.016
142 C 15	3.28	4.17	142	60	1.5	136.4	20.1	19.22	4.77	5.68	2.18	7.10	1.80	7.566	2.148
142 C 16	3.49	4.44	142	60	1.6	145.1	21.3	20.44	5.06	5.67	2.17	7.10	1.80	8.341	2.279
142 C 18	3.90	4.97	142	60	1.8	162.2	23.7	22.85	5.63	5.67	2.16	7.10	1.80	9.862	2.535
142 C 20	4.32	5.50	142	60	2.0	179.1	26.0	25.23	6.19	5.66	2.16	7.10	1.80	11.315	2.787
172 C 13	3.26	4.15	172	65	1.3	194.7	22.7	22.64	4.83	6.81	2.32	8.60	1.81	7.507	2.174
172 C 14	3.50	4.46	172	65	1.4	209.1	24.3	24.32	5.18	6.81	2.32	8.60	1.81	8.505	2.330
172 C 15	3.75	4.77	172	65	1.5	223.5	25.9	25.98	5.52	6.80	2.31	8.60	1.81	9.523	2.484
172 C 16	3.99	5.08	172	65	1.6	237.7	27.5	27.64	5.86	6.80	2.31	8.60	1.81	10.552	2.636
172 C 18	4.47	5.69	172	65	1.8	266.0	30.6	30.93	6.52	6.79	2.30	8.60	1.81	12.607	2.935
172 C 20	4.94	6.30	172	65	2.0	294.0	33.6	34.18	7.17	6.78	2.29	8.60	1.81	14.610	3.228
172 C 23	5.65	7.20	172	65	2.3	335.3	38.1	38.99	8.13	6.76	2.28	8.60	1.81	17.466	3.656
172 C 25	6.11	7.79	172	65	2.5	362.5	41.0	42.16	8.74	6.75	2.27	8.60	1.82	19.278	3.934
202 C 13	3.57	4.54	202	65	1.3	282.9	23.8	28.01	4.91	7.85	2.28	10.10	1.66	8.862	2.209
202 C 14	3.83	4.88	202	65	1.4	303.9	25.4	30.09	5.26	7.85	2.27	10.10	1.66	10.076	2.367
202 C 15	4.10	5.22	202	65	1.5	324.8	27.1	32.16	5.61	7.84	2.27	10.10	1.66	11.312	2.523
202 C 16	4.36	5.56	202	65	1.6	345.6	28.8	34.22	5.95	7.84	2.26	10.10	1.66	12.560	2.678
202 C 18	4.89	6.23	202	65	1.8	386.9	32.0	38.31	6.63	7.83	2.25	10.10	1.66	15.052	2.982
202 C 20	5.41	6.90	202	65	2.0	427.8	35.2	42.36	7.29	7.82	2.24	10.10	1.67	17.487	3.280
202 C 23	6.19	7.89	202	65	2.3	488.4	39.9	48.35	8.26	7.80	2.23	10.10	1.67	20.986	3.716
202 C 27	7.21	9.19	202	65	2.7	567.7	45.9	56.20	9.50	7.78	2.21	10.10	1.67	25.405	4.274
232 C 14	4.16	5.30	232	65	1.4	420.9	26.4	36.28	5.32	8.87	2.22	11.60	1.54	11.556	2.396
232 C 15	4.45	5.67	232	65	1.5	449.9	28.2	38.79	5.68	8.86	2.22	11.60	1.54	13.022	2.555
232 C 16	4.74	6.04	232	65	1.6	478.8	29.9	41.28	6.03	8.86	2.21	11.60	1.54	14.499	2.711
232 C 18	5.32	6.77	232	65	1.8	536.3	33.3	46.23	6.71	8.85	2.20	11.60	1.54	17.448	3.020
232 C 20	5.89	7.50	232	65	2.0	593.1	36.6	51.13	7.38	8.83	2.19	11.60	1.54	20.340	3.322
232 C 23	6.73	8.58	232	65	2.3	677.5	41.4	58.40	8.36	8.82	2.18	11.60	1.55	24.524	3.763
232 C 25	7.29	9.29	232	65	2.5	733.0	44.6	63.19	9.00	8.81	2.17	11.60	1.55	27.220	4.049
262 C 15	4.81	6.12	262	65	1.5	600.8	29.1	45.86	5.73	9.86	2.17	13.10	1.43	14.612	2.580
262 C 16	5.12	6.52	262	65	1.6	639.5	30.8	48.82	6.09	9.85	2.16	13.10	1.43	16.330	2.739
262 C 18	5.74	7.31	262	65	1.8	716.4	34.3	54.69	6.78	9.84	2.15	13.10	1.43	19.760	3.050
262 C 20	6.36	8.10	262	65	2.0	792.7	37.8	60.51	7.46	9.83	2.15	13.10	1.44	23.134	3.356
262 C 23	7.27	9.27	262	65	2.3	905.8	42.7	69.15	8.45	9.82	2.13	13.10	1.44	28.047	3.801
262 C 25	7.88	10.04	262	65	2.5	980.4	46.0	74.84	9.09	9.80	2.12	13.10	1.44	31.231	4.091
262 C 29	9.08	11.57	262	65	2.9	1127.6	52.2	86.08	10.33	9.78	2.10	13.10	1.45	37.436	4.650
302 C 18	7.10	9.04	302	88	1.8	1228.5	84.4	81.36	12.66	11.60	3.04	15.10	2.14	25.256	5.698
302 C 20	7.86	10.02	302	88	2.0	1360.3	93.0	90.09	13.97	11.59	3.03	15.10	2.14	30.351	6.285
302 C 23	9.01	11.47	302	88	2.3	1556.4	105.8	103.07	15.89	11.58	3.02	15.10	2.14	38.110	7.149
302 C 25	9.76	12.44	302	88	2.5	1686.0	114.1	111.65	17.14	11.57	3.01	15.10	2.14	43.246	7.713
302 C 29	11.27	14.35	302	88	2.9	1942.4	130.3	128.63	19.59	11.55	2.99	15.10	2.15	53.219	8.816
342 C 20	8.49	10.82	342	88	2.0	1826.8	96.1	106.83	14.11	12.93	2.97	17.10	1.99	34.212	6.351
342 C 23	9.73	12.39	342	88	2.3	2090.8	109.3	122.27	16.05	12.92	2.95	17.10	1.99	43.256	7.224
342 C 25	10.55	13.44	342	88	2.5	2265.4	117.9	132.48	17.32	12.91	2.94	17.10	2.00	49.248	7.795
342 C 27	11.37	14.48	342	88	2.7	2438.8	126.3	142.62	18.57	12.90	2.93	17.10	2.00	55.149	8.357
342 C 30	12.58	16.03	342	88	3.0	2696.9	138.8	157.71	20.41	12.88	2.92	17.10	2.00	63.794	9.183
402 C 30	14.37	18.31	402	95	3.0	4167.4	178.4	207.33	23.92	14.99	3.10	20.10	2.04	78.846	10.765

Contact Information

voestalpine Metsec plc Purlins & Side Rails

Tel: +44 (0) 121 601 6000

Fax: +44 (0) 121 601 6065