A concrete blockout around the buckling restrained brace casing ensures the gusset plate maintains direct contact with the concrete. Three-inch thick low-density expanded polystyrene bead board is required on all sides of the casing where buried below grade. A one-inch clearance is maintained at the sides of the casing, with a three-inch clearance at the end. Concrete placement is prohibited until the brace is installed and inspected. The gusset plate must remain free of blockout material to ensure direct contact with the surrounding concrete.
1" 3" 3" 3" 3" 3" 1" NOTE: PROVIDE BLOCKOUT MATERIAL IN HATCHED REGIONS AS SHOWN, BUT DO NOT PLACE MATERIAL AROUND GUSSET OR CONNECTION REGION. (CONCRETE SHOULD DIRECTLY CONTACT GUSSET) PROVIDE LOW-DENSITY EXPANDED (BEAD BOARD) 3" THICK WHERE BURIED IN CONCRETE SHOULD DIRECTLY CONTACT GUSSET) WHERE BRACE IS BELOW GRADE PROVIDE 3" LOW-DENSITY EXPANDED POLYSTYRENE ON ALL SIDES. PROVIDE CONCRETE BLOCKOUT AROUND BRACE -- DO NOT PLACE CONCRETE UNTIL BRACE IS INSTALLED AND INSPECTED. T.O.C. T.O.C. MAINTAIN 1" AT SIDE AND 3" AT END CLEARANCE BETWEEN CASING AND CONCRETE, TYP. T.O.C. APPROVED BY THE ENGINEER OF RECORD AND THE
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