Table 4: Statistical analysis of resistance uncertainty of cold-formed thin-walled steel members.

Grade		Member type	KM		KF		KP		R
			Mean	Variation coefficient	Mean	Variation coefficient	Mean	Variation coefficient	Mean	Variation coefficient
LG550	A	axially-compressed members	1.2389	0.0279	0.9992	0.0169	1.1073	0.1675	1.3707	0.1706
	B		1.1355	0.0316	0.9948	0.0154	1.1073	0.1675	1.2508	0.1711
	C		1.0179	0.0376	0.9968	0.0135	1.144	0.1662	1.1608	0.1709
	D		0.9200	0.0302	0.9977	0.0097	1.144	0.1662	1.0501	0.1692
	A	eccentrically-compressed members	1.2389	0.0279	1.0303	0.0333	1.0469	0.1979	1.3363	0.2026
	B		1.1355	0.0316	1.0320	0.0205	1.0469	0.1979	1.2268	0.2015
	C		1.0179	0.0376	1.0405	0.0137	1.0977	0.1973	1.1626	0.2013
	D		0.9200	0.0302	1.0493	0.0082	1.0977	0.1973	1.0597	0.1998
S350		axially-compressed members	1.0936	0.0851	1.0254	0.0108	1.0769	0.1084	1.2076	0.1382
		eccentrically-compressed members	1.0936	0.0851	1.0359	0.0120	1.1318	0.1038	1.2821	0.1348
S280		axially-compressed members	1.0837	0.0715	1.0391	0.0466	1.0555	0.0565	1.1886	0.1024
		eccentrically-compressed members	1.0837	0.0715	1.0466	0.0331	1.2363	0.1252	1.4022	0.1479