Minimum thickness of steel work directly exposed to weather but not accessible for cleaning and repainting, the thickness should be not less than

Minimum thickness of steel work directly exposed to weather but not ac

1.	Minimum thickness of steel work directly exposed to weather but not accessible for cleaning and repainting, the thickness should be not less than
A.	4 mm
B.	6 mm
C.	7 mm
D.	8 mm
Answer» E.