This structural concrete stair detail shows a poured-in-place concrete stair run supported by a concrete footing bearing on ninety percent compacted fill. The stair slab is reinforced with number three bars spaced at twelve inches on center each way, complemented by two number four bars within the ten-inch minimum footing and number three nosing bars typically placed at each step. The profile features defined tread and riser dimensions with a six-inch slab thickness, tying into an adjacent concrete slab or asphalt paving per the site plan.
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