This cast-in-place concrete stair assembly bears directly on ninety percent compacted fill over a subgrade. The stair slab features a six-inch thickness with three-inch concrete cover, reinforced by number three bars at twelve inches on center each way. Each tread and riser incorporates a number three nosing bar typical. The bottom landing rests on a ten-inch minimum concrete footing reinforced with two number four bars and extending one foot minimum below grade. Exact step profiles and adjacent paving details are coordinated per architectural and site plans.
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