Indicates whether the software uses the specified values of individual course thicknesses of t1 and t2 in subsequent computations.
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If you select this check box, the software performs the thickness checks per API-653 2.3.3.1. Values of t1 or t2 left blank will assume the thickness specified on the General Tank Data dialog box.
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If you clear this check box, the software does not perform the thickness checks of API-653 2.3.3.1.