Millwork casing is buried in concrete, utilizing a one-inch-thick low-density expanded polystyrene bead board at the sides and a three-inch thickness at the end. Maintain a one-inch clearance at the side and a three-inch clearance at the end between the casing and the concrete. The top of concrete level is indicated for reference.
1" 3" 3" 1" 1" 3" 1" PROVIDE LOW-DENSITY EXPANDED POLYSTRENE (BEAD BOARD) 1" THICK AT SIDES & 3" THICK AT END WHERE BURIED IN CONC, TYP T.O.C. T.O.C. T.O.C. MAINTAIN 1" AT SIDE & 3" AT END CLEARANCE BETWEEN CASING & CONC, TYP
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