Low-density expanded polystyrene bead board is provided at one inch thick on the sides and three inches thick at the end where buried in concrete. A one-inch clearance is maintained at the side and a three-inch clearance at the end between the casing and concrete typical.
3" 1" TOC 3" 1" 1" TOC 1" TOC 3" MAINTAIN 1" AT SIDE AND 3" AT END CLEARANCE BETWEEN CASING AND CONC, TYP PROVIDE LOW-DENSITY EXPANDED POLYSTYRENE (BEAD BOARD) 1" THICK AT SIDES AND 3" THICK AT END WHERE BURIED IN CONC, TYP
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