Experimental Study and Direct Strength Method for Cold-Formed Steel Built-Up I-Sectional Columns under Axial Compression

Table 2

Measured dimensions of specimens.

Specimen	Section	L1 (mm)	h1 (mm)	b1 (mm)	a1 (mm)	∆max (mm)
DC7510-05-S150-N-1	a	499.5	73.88	39.46	9.14	1.62
	b		73.7	39.4	9.84
DC7510-05-S150-N-2	a	499.5	73.72	39.28	9.23	1.42
	b		73.21	39.35	9.08
DC7510-15-S150-N-1	a	1500	74.2	39.21	9.64	1.22
	b		73.89	39.07	9.25
DC7508-15-S150-N-2	a	1500	73.59	39.85	9.19	0.89
	b		73.94	39.52	9.78
DC7508-15-S300-N-1	a	1500	73.99	39	9.01	1.07
	b		73.06	39.89	9.78
DC7510-15-S300-N-2	a	1500	74.16	39.96	9.94	1.22
	b		75.58	39.05	10.69
DC7510-15-S150-Y-1	a	1500	75	39.65	10.08	0.53
	b		75	39.77	9.9
DC7510-15-S300-Y-1	a	1500	73.77	39.65	10.08	0.78
	b		74.27	39.77	9.9
DC7510-20-S150-N-1	a	1999.85	75.75	39.86	9.89	0.82
	b		75.47	39.76	9.04
DC7510-20-S150-N-2	a	1999.8	75.21	39.97	9.32	0.56
	b		74.8	39.82	9.31
DC7510-20-S300-N-1	a	1999.65	74.15	40.13	9.99	0.75
	b		75.31	39.79	10.08
DC7510-20-S300-N-2	a	1999.95	75.96	39.82	9.58	1.04
	b		75.31	39.81	9.93
DC7510-20-S150-Y-1	a	1999.55	75.56	39.78	9.74	1.22
	b		74.48	40.68	9.95
DC7510-20-S300-Y-1	a	1999.8	74.58	39.93	9.91	1.28
	b		75.76	39.64	9.67
DC10008-05-S150-N-1	a	499.5	97.91	89.17	9.91	0.53
	b		97.48	89.91	9.44
DC10008-05-S150-N-2	a	499.5	98.45	89.47	9.45	0.62
	b		97.99	88.79	9.7
DC10008-15-S150-N-1	a	1499.25	99.13	89.99	9.29	1.03
	b		99.21	89.41	9.72
DC10008-15-S150-N-2	a	1499.25	98.96	89.74	9.82	1.15
	b		98.97	89.54	9.4
DC10008-15-S300-N-1	a	1499.1	97.89	89.9	9.59	1.28
	b		97.54	88.72	9.46
DC10008-15-S300-N-2	a	1499.25	95.58	89.82	9.18	1.08
	b		98.2	89.7	8.99
DC10008-15-S150-Y-1	a	1500	98.55	89.78	9.77	0.85
	b		99.4	89.54	9.73
DC10008-15-S300-Y-1	a	1500	98.98	90.38	8.9	0.96
	b		99.27	89.41	9.79
DC10008-20-S150-N-1	a	2000	98.03	89.56	10.04	1.20
	b		99.66	89.2	9.65
DC10008-20-S150-N-2	a	1999.95	99.53	89.6	9.52	1.18
	b		99.22	89.42	9.73
DC10008-20-S300-N-1	a	2000.05	99.14	89.49	9.63	1.10
	b		98.88	89.75	9.62
DC10008-20-S300-N-2	a	1999.95	99.57	89.62	9.3	0.96
	b		100.8	89.06	9.98
DC10008-20-S150-Y-1	a	2000	100.0	89.09	9.9	0.88
	b		99.61	89.08	9.64
DC10008-20-S300-Y-1	a	2000	99.48	89.32	9.36	0.84
	b		99.43	89.25	9.38
DC9008-05-S150-N-1	a	499.15	88.75	49.41	14.55	0.59
	b		88.26	49.16	14.76
DC9008-05-S150-N-2	a	499.1	89.26	49.03	15.83	1.21
	b		88.51	49.19	15.11
DC9008-15-S150-N-1	a	1499.5	89.4	49.57	14.68	0.65
	b		89.3	49.52	14.47
DC9008-15-S150-N-2	a	1499.35	89.14	49.51	14.51	1.20
	b		89.37	49.89	14.13
DC9008-15-S300-N-1	a	1499.3	87.55	49.44	14.88	0.47
	b		89.3	49.75	14.49
DC9008-15-S300-N-2	a	1500	90.1	50.25	14.9	0.68
	b		89.9	49.8	15.08
DC9008-15-S150-Y-1	a	1499.5	89.86	49.33	14.31	1.06
	b		90.03	49.06	14.57
DC9008-15-S300-Y-1	a	1499.25	90.05	48.53	15.34	0.73
	b		89.98	49.82	14.39
DC9008-20-S150-N-1	a	2000	89.27	49.37	14.87	1.03
	b		89.76	49.35	14.77
DC9008-20-S150-N-2	a	1999.9	90.29	49.52	14.2	0.69
	b		89.86	49.73	14.15
DC9008-20-S300-N-1	a	2000	90.18	49.33	14.45	0.79
	b		89.12	49.61	14.6
DC9008-20-S300-N-2	a	1999.95	90.2	48.72	14.9	0.87
	b		89.03	49.48	14.78
DC9008-20-S150-Y-1	a	2000	88.67	49.51	15.25	1.03
	b		89.94	49.32	14.6
DC9008-20-S300-Y-1	a	1999.95	90.31	49.43	14.21	1.11
	b		89.43	48.85	15.1
DC8008-05-S150-N-1	a	499.45	79.05	59.1	9.83	0.78
	b		78.69	58.78	9.58
DC8008-05-S150-N-2	a	499.5	76.55	59.12	9.98	0.63
	b		77.99	59.45	9.9
DC8008-15-S150-N-1	a	1499.5	80.75	59.57	9.47	1.23
	b		79.54	59.63	9.64
DC8008-15-S150-N-2	a	1499.5	80.19	59.22	9.79	1.15
	b		79.56	59.33	9.84
DC8008-15-S300-N-1	a	1499.1	79.46	59.99	8.92	0.94
	b		79.12	59.65	9.55
DC8008-15-S300-N-2	a	1500	80	60	10	0.86
	b		80	60	10
DC8008-15-S150-Y-1	a	1499.5	78.98	59.51	9.39	0.92
	b		79.97	59.23	9.28
DC8008-15-S300-Y-1	a	1499.3	80.11	59.67	9.28	1.12
	b		79.71	59.65	9.57
DC8008-20-S150-N-1	a	1999.95	79.57	58.49	10.2	0.88
	b		79.41	58.42	10.27
DC8008-20-S150-N-2	a	1999.85	79.32	59.12	10.02	0.91
	b		78.87	59.7	9.53
DC8008-20-S300-N-1	a	1999.65	78.53	59.63	9.86	0.93
	b		78.39	60.03	9.33
DC8008-20-S300-N-2	a	2000	79.09	60.02	9.18	1.11
	b		79.71	59.51	9.44
DC8008-20-S150-Y-1	a	1999.95	79.86	59.3	9.93	1.08
	b		80.06	59.33	9.48
DC8008-20-S300-Y-1	a	2000	80.78	59.16	9.42	1.03
	b		79.43	59.32	9.67