Table 2: Uncertainty of geometric characteristics of cold-formed thin-walled steel members.

Grade Member type Uncertainty of geometric characteristics KF
Mean Variation coefficient
LG550 A axially-compressed members 0.9992 0.0169
B 0.9948 0.0154
C 0.9968 0.0135
D 0.9977 0.0097
A eccentrically-compressed members 1.0303 0.0333
B 1.0320 0.0205
C 1.0405 0.0137
D 1.0493 0.0082
S350 axially-compressed members 1.0254 0.0108
eccentrically-compressed members 1.0359 0.0120
S280 axially-compressed members 1.0391 0.0466
eccentrically-compressed members 1.0466 0.0331