A center thickened concrete section features a one-foot-six-inch base width and a one-foot depth, supporting a stair stringer. Reinforcing includes three continuous number five bottom bars within the thickened zone and number four bars spaced at twelve inches on center with standard laps. The stair stringer and its connection to the slab are designated as bidder designed and reference architectural drawings for location.
1 1 CENTER THICKENED SLAB ON STAIR STRINGER SLAB ON GRADE REF. PLAN (3) #5 CONT. BOT. #4 @ 12" o.c. BIDDER DESIGNED STAIR STRINGER AND CONNECTION TO SLAB REF. ARCH. DWGS. FOR LOCATION UNDER SLAB PREPARATION 1' - 0" 1' - 6" LAP LAP 1" = 1'-0" 5 TYP. STEP IN SLAB ON GRADE
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