Reinforced concrete chimney walls are detailed with number 8 vertical reinforcing bars spaced at six inches on center and number 5 horizontal reinforcing bars spaced at twelve inches on center typically. Vertical rebar requires standard hooks at wall openings where they occur. Dimensions indicate a 4-foot by 4-foot opening centered with 1-foot-9-inch side clearances.
SECT 1'-9" 4'-0" 1'-9" 4'-0" #5 @ 12" HORIZ, TYP AT CHIMNEY WALLS. #8 @ 6" VERT, TYP AT CHIMNEY WALLS HOOK VERT AT OPENG WHERE OCCURS
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