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Cut along the dotted lines and place the corrugated protector over the top and front of the tub. The center cut-out drops into the center of the tub. After measuring the dimensions of the product, frame the construction area. Locate the tub in position and mark a joist so that a 2x4 stringer can be nailed in place. The stringer will be located under the flange against the wall. Nail in place the 2x4 support. Re-position the tub and check for level, both front to back and left to right. It ma