The concrete opening requires a minimum of four inches of concrete cover as specified by the panel manufacturer. A half-inch shim with backer rod and sealant is applied on all four sides at both the interior and exterior boundaries of the opening.
1/2" SHIM W/ BACKER ROD AND SEALANT - TYP. ALL 4 SIDES INTERIOR EXTERIOR . 4" MINIMUM CONCRETE COVER AT OPENING, PER PANEL MANUFACTURER
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