Z Purlin Sizes: Dimensions And Properties

The section reference of a Z-section 232mm deep and 1.8mm thick would be 232 Z 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 Z for Z-section). The last two digits indicate the material thickness (i.e. 18 = 1.8mm).

Take a look at our purlins technical manual located in the downloads centre

Sleeves

The sleeve reference is the same as the purlin it is being used in conjunction with, except that it is prefixed with ‘PS’ for a standard sleeve and ‘HEBS’ for a heavy end bay sleeve ie:

PS 232 Z 18 standard 232 Z 18 sleeve
HEBS 232 Z 18 heavy end bay 232 Z 18 sleeve

All voestalpine Metsec Z-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	Lt mm	Lb mm	E mm	Fmm
142-262	14	16	44	42
302-402	19	21	55	52

Nominal Dimensions							Section Properties
Section Reference	Weight kg/m	Area cm²	Depth mm	Top Flange	Bottom Flange	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 Z 13	2.84	3.62	142	60	55	1.3	117.4	27.2	16.34	4.65	5.66	2.72	7.19	5.52	6.007	2.091
142 Z 14	3.05	3.89	142	60	55	1.4	126.1	29.1	17.54	4.98	5.66	2.72	7.19	5.52	6.776	2.240
142 Z 15	3.26	4.16	142	60	55	1.5	134.6	31.0	18.74	5.31	5.65	2.71	7.19	5.51	7.554	2.388
142 Z 16	3.47	4.42	142	60	55	1.6	143.2	32.9	19.93	5.63	5.65	2.71	7.19	5.51	8.330	2.534
142 Z 18	3.89	4.95	142	60	55	1.8	160.1	36.5	22.28	6.27	5.64	2.69	7.19	5.49	9.850	2.821
142 Z 20	4.30	5.48	142	60	55	2.0	176.8	40.1	24.60	6.89	5.63	2.68	7.19	5.48	11.302	3.101
172 Z 13	3.25	4.14	172	65	60	1.3	192.6	33.9	22.17	5.33	6.79	2.85	8.69	6.01	7.497	2.397
172 Z 14	3.49	4.45	172	65	60	1.4	206.9	36.3	23.81	5.71	6.78	2.84	8.69	6.01	8.498	2.569
172 Z 15	3.73	4.76	172	65	60	1.5	221.1	38.6	25.44	6.09	6.78	2.83	8.69	6.00	9.517	2.739
172 Z 16	3.98	5.06	172	65	60	1.6	235.2	41.0	27.07	6.46	6.77	2.83	8.69	6.00	10.547	2.908
172 Z 18	4.45	5.67	172	65	60	1.8	263.1	45.6	30.29	7.20	6.76	2.81	8.69	5.99	12.603	3.239
172 Z 20	4.93	6.28	172	65	60	2.0	290.8	50.1	33.47	7.92	6.75	2.80	8.69	5.98	14.606	3.564
172 Z 23	5.63	7.17	172	65	60	2.3	331.7	56.6	38.18	8.97	6.74	2.78	8.69	5.96	17.460	4.038
172 Z 25	6.09	7.76	172	65	60	2.5	358.6	60.8	41.28	9.66	6.73	2.77	8.69	5.95	19.271	4.346
202 Z 13	3.56	4.53	202	65	60	1.3	280.2	33.9	27.49	5.32	7.83	2.72	10.19	6.01	8.854	2.395
202 Z 14	3.82	4.87	202	65	60	1.4	301.0	36.3	29.53	5.70	7.82	2.71	10.19	6.00	10.072	2.567
202 Z 15	4.09	5.21	202	65	60	1.5	321.7	38.6	31.56	6.08	7.82	2.71	10.19	6.00	11.310	2.737
202 Z 16	4.35	5.54	202	65	60	1.6	342.4	41.0	33.58	6.46	7.81	2.70	10.19	5.99	12.559	2.905
202 Z 18	4.88	6.21	202	65	60	1.8	383.3	45.6	37.60	7.19	7.80	2.69	10.19	5.98	15.051	3.236
202 Z 20	5.40	6.88	202	65	60	2.0	423.8	50.1	41.57	7.91	7.79	2.68	10.19	5.97	17.486	3.560
202 Z 23	6.17	7.86	202	65	60	2.3	483.8	56.6	47.45	8.96	7.78	2.66	10.19	5.96	20.984	4.034
202 Z 27	7.19	9.16	202	65	60	2.7	562.3	64.9	55.16	10.32	7.76	2.64	10.19	5.94	25.403	4.642
232 Z 14	4.15	5.29	232	65	60	1.4	417.3	36.3	35.67	5.70	8.84	2.61	11.70	6.00	11.554	2.565
232 Z 15	4.44	5.66	232	65	60	1.5	446.1	38.6	38.14	6.08	8.84	2.60	11.70	5.99	13.022	2.734
232 Z 16	4.73	6.02	232	65	60	1.6	474.8	41.0	40.59	6.45	8.83	2.59	11.70	5.99	14.500	2.903
232 Z 18	5.30	6.75	232	65	60	1.8	531.7	45.6	45.45	7.19	8.82	2.58	11.70	5.98	17.450	3.234
232 Z 20	5.87	7.48	232	65	60	2.0	588.1	50.1	50.27	7.91	8.81	2.57	11.70	5.97	20.342	3.558
232 Z 23	6.71	8.55	232	65	60	2.3	671.8	56.6	57.42	8.96	8.79	2.55	11.70	5.95	24.526	4.031
232 Z 25	7.27	9.26	232	65	60	2.5	726.8	60.8	62.13	9.64	8.78	2.54	11.70	5.94	27.221	4.338
262 Z 15	4.79	6.11	262	65	60	1.5	596.2	38.6	45.16	6.07	9.83	2.50	13.20	5.99	14.614	2.733
262 Z 16	5.11	6.50	262	65	60	1.6	634.6	41.0	48.07	6.45	9.83	2.50	13.20	5.98	16.333	2.901
262 Z 18	5.73	7.29	262	65	60	1.8	710.9	45.6	53.85	7.18	9.82	2.49	13.20	5.97	19.763	3.231
262 Z 20	6.34	8.08	262	65	60	2.0	786.6	50.1	59.58	7.90	9.81	2.47	13.20	5.96	23.138	3.555
262 Z 23	7.26	9.24	262	65	60	2.3	898.9	56.6	68.08	8.95	9.79	2.46	13.20	5.95	28.051	4.028
262 Z 25	7.86	10.01	262	65	60	2.5	972.9	60.8	73.69	9.63	9.78	2.45	13.20	5.94	31.236	4.335
262 Z 29	9.06	11.54	262	65	60	2.9	1118.9	69.0	84.75	10.96	9.76	2.42	13.20	5.92	37.442	4.930
302 Z 18	7.10	9.04	302	90	82	1.8	1224.4	120.6	80.11	13.74	11.59	3.64	15.29	8.24	25.234	6.181
302 Z 20	7.86	10.02	302	90	82	2.0	1355.9	132.9	88.70	15.15	11.57	3.62	15.29	8.23	30.362	6.819
302 Z 23	9.01	11.47	302	90	82	2.3	1551.3	150.9	101.49	17.24	11.56	3.61	15.29	8.21	38.205	7.758
302 Z 25	9.76	12.44	302	90	82	2.5	1680.5	162.7	109.94	18.60	11.55	3.59	15.29	8.20	43.417	8.372
302 Z 29	11.27	14.35	302	90	82	2.9	1936.1	185.6	126.66	21.27	11.53	3.57	15.29	8.18	53.561	9.573
342 Z 20	8.49	10.82	342	90	82	2.0	1821.7	132.9	105.34	15.14	12.92	3.49	17.29	8.22	34.241	6.812
342 Z 23	9.73	12.39	342	90	82	2.3	2085.0	151.0	120.56	17.22	12.90	3.47	17.29	8.20	43.380	7.750
342 Z 25	10.55	13.44	342	90	82	2.5	2259.1	162.7	130.63	18.59	12.89	3.46	17.29	8.19	49.455	8.364
342 Z 27	11.37	14.48	342	90	82	2.7	2432.1	174.3	140.63	19.93	12.88	3.45	17.29	8.18	55.447	8.968
342 Z 30	12.58	16.03	342	90	82	3.0	2689.4	191.3	155.51	21.91	12.86	3.43	17.29	8.17	64.227	9.858
402 Z 30	14.37	18.31	402	97	89	3.0	4158.1	241.1	204.83	25.54	14.98	3.61	20.30	8.86	79.277	11.494

Contact Information

voestalpine Metsec plc Purlins & Side Rails

Tel: +44 (0) 121 601 6000

Fax: +44 (0) 121 601 6065