Railing Extension Requirements
Railing Extensions for Ramp Rails
Ramp handrails extend horizontally above the landing for 12 inches minimum beyond the top and bottom of the ramp runs.
Railing Extensions on Stairs
Top Extension on Stairs – Handrails extend horizontally above the landing for 12 inches minimum beginning directly above first riser nosing.
Handrails extend horizontally above the landing for 12 inches minimum beginning directly above first riser nosing.
Bottom 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
Handrails extend at the slope of the stair flight for a horizontal distance equal to one tread depth beyond the last riser nosing.
Note: Some jurisdictions still require a tread depth plus 12″ beyond the last riser nosing. Always confirm the requirements of your local authority having jurisdiction.
Extensions are measured based on continuously grippable area. Curved sections and radii are not to be included in the measurement.
Always confirm with local Authority Having Jurisdiction (AHJ) to confirm the applicability of any building code requirement.
Also note that the intent of the extension requirement in the ADA is that the extension is in the direction of travel.
505.10 Handrail Extensions. Handrail gripping surfaces shall extend beyond and in the same direction of stair flights and ramp runs in accordance with 505.10.
. . . 3. In alterations, full extensions of handrails shall not be required where such extensions would be hazardous due to plan configuration.
The exception above does not apply in new construction and would also not apply where space is not constrained.
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