Indicates whether the specified location L is used in subsequent thickness calculations.
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If you select this check box, the software uses the user-specified values of the location of L to be used in determining the height to the maximum design liquid level. When this box is checked, the height value is computed according to API-653 Section 2.3.3.1.
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If you clear this check box, the software ignores the user input values of the location of L in subsequent computations. The thickness computations use a height value measured from the bottom of each course, which produces more conservative (thicker) thicknesses.