A concrete stair on grade with reinforcing steel bars and a cheek wall key connection features a stair slab incorporating number three bars at twelve inches on center at each stair, number four bars at sixteen inches on center at the bottom, and number three nosing bars typically. Additional bottom reinforcing consists of number four bars below each riser and a pair of number four bars at the footing with a ten-inch width and twelve-inch minimum depth. The adjacent building wall or cheek wall features a continuous three-quarter-inch by five-inch keyway and number four dowels at twelve inches on center with standard hooks. Splices utilize a class 'A' lap with a six-inch minimum length.
A A #3@12" OC @ EA STAIR TYP #4@16" OC BOT FIN GRADE (2)#4 BOT REINF TYP SLAB ON GRADE REINF #4 BOT BELOW EA RISER TYP TYP REINF AT CHEEK WALL (BEYOND) 3/4"x5" CONT KEY BLDG WALL OR CHEEK WALL #4@12" OC DOWEL W/ STD HOOK NOTES: 1. WHERE CHEEK WALL IS REQ'D PROVIDE 8" THK CONC WALL W/ #4@12" OC EW 2. FOR DIMENSIONS NOT NOTED, SAD OR SLAB SEE PLAN #3 NOSING BAR TYP SPLICE CLASS 'A' LAP 6" MIN 10" 12" MIN CLASS 'A' LAP SPLICE
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