Provide one-inch thick low-density expanded polystyrene bead board at the sides and three-inch thick at the end where buried in concrete. Maintain a one-inch side clearance and three-inch end clearance between the casing and the concrete typical. Align the top of concrete with the designated level.
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 THICKNESS, tg
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