Le is defined as the length of the work roll barrel

Equation (20-39) presents the strip crown c corresponding to the roll contact length effect rate kre , strip width w , strip modulus M , and roll contact length Le , in relation to the strip crown c0 corresponding to the roll contact length effect rate kreo, strip width w0 , strip modulus M 0 , and roll contact length Leo:

where mrc = strip modulus effect coefficient related to roll contact length effect.