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

Table 6

Comparison on load capacities for built-up columns with and without the end fastener group.

Built-up columns	L (mm)	λ	Buckling modes	PA (kN)	(PA2 − PA1)/PA1 (%)
DC10010-15-S150-N-S	1500	29.65	L + D	129.40	0.15
DC10010-15-S150-Y-S			L + D	129.60
DC10010-15-S300-N-S			L + D	127.51	0.64
DC10010-15-S300-Y-S			L + D	128.32
DC10010-15-S450-N-S			L + D	122.80	4.07
DC10010-15-S450-Y-S			L + D	127.80
DC10010-20-S150-N-S	2000	39.53	L + D	119.29	0.79
DC10010-20-S150-Y-S			L + D	120.24
DC10010-20-S300-N-S			L + D	117.92	2.15
DC10010-20-S300-Y-S			L + D	120.46
DC10010-20-S450-N-S			L + D	113.20	5.54
DC10010-20-S450-Y-S			L + D	119.47
DC7510-15-S150-N-S	1500	37.53	L + D	92.21	1.49
DC7510-15-S150-Y-S			L + D	93.58
DC7510-15-S300-N-S			L + D	91.3	1.42
DC7510-15-S300-Y-S			L + D	92.6
DC7510-15-S450-N-S			L + D	87.63	4.42
DC7510-15-S450-Y-S			L + D	91.5
DC7510-20-S150-N-S	2000	50.04	L + D	87.43	2.85
DC7510-20-S150-Y-S			L + D	89.92
DC7510-20-S300-N-S			L + D	86.68	2.40
DC7510-20-S300-Y-S			L + D	88.76
DC7510-20-S450-N-S			L + D	82.8	5.80
DC7510-20-S450-Y-S			L + D	87.6