Specifies a thickness increment which is used to determine the final value of the shell thicknesses.
TANK rounds up the computed value of thickness to the nearest multiple of the increment.
For example, you set this configuration setting to 0.125 (1/8 inch) and the computed
shell course thickness is 0.2671 inches, the final value reported is 0.375 inches.
Setting this configuration setting to 0.0 disables thickness round up and the computed values of shell thickness are reported unaltered in the output.