Rationale

Due to the changes in the "nominal thickness" definition in C11, this standard requires revising to the thickness sections. Potentially "Thickness - The nominal thickness shall be 1/2 in.[12.7 mm] with tolerances in the thickness of +/- 0.015 in. [+/- 0.40mm] with local variations of +/- 0.030 in. [0.80 mm].