Table 8: Standard strength and recommended design strength.

Steel grade Thickness Yeild strength/MPa Design strength/MPa
LG550 A t < 0.6mm 530 455
B 0.6mm≤t≤0.9mm 500 430
C 0.9mm<t≤1.2mm 460 400
D t>1.2mm 420 360
S350 0.6mm≤t≤2.0mm 350 300
S280 0.6mm≤t≤2.0mm 280 240