Note: Some jurisdictions still require a tread depth plus 12″ beyond the last riser nosing. Handrails extend at the slope of the stair flight for a horizontal distance equal to one tread depth beyond the last riser nosing. Handrails extend horizontally above the landing for 12 inches minimum beginning directly above first riser nosing.īottom Extension on Stairs – Handrails extend at the slope of the stair flight for a horizontal distance equal to one tread depth beyond the last riser nosing Top Extension on Stairs – Handrails extend horizontally above the landing for 12 inches minimum beginning directly above first riser nosing. Ramp handrails extend horizontally above the landing for 12 inches minimum beyond the top and bottom of the ramp runs.
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