Ramp handrails should extend straight and horizontally above the landing for at least 12″ beyond both the top and bottom of ramp runs. Extend past the length of the ramp and/or stairs ADA handrails with a non-circular cross-section should have a perimeter dimension between 4″ and 6.25″ with a maximum cross-section dimension of 2.25″.Ħ. This also a reason why aluminum stairs must be free of dirt and must be kept clean at all times.ĪDA handrails with a circular cross-section should have an outside diameter between 1.25″ and 2″. This guideline ensures that persons using the steps or ramp can easily grip the handrails. They cannot be obstructed along their tops or sides, and the bottoms should not be obstructed for more than 20% of their length. Handrail gripping surfaces should have minimal obstruction. Handrails should be at a consistent height for the length of the stair flight or ramp run, including any platforms 4. For ramps and platforms, the handrail height can be measured at any point along the path. For a set of steps, the height of the handrail is measured from the edge of each nosing to the top of the handrail. The top of the gripping surfaces must be between 34″ and 38″ above the walking surface. Positioned between 34″ to 38″ above surface This guideline applies to all handrails, including the inside handrails on switchback or L-shaped stairs and ramps they must continue through the platforms. They cannot end or break at any point within the bounds of the steps or ramp. Handrails must be continuous through the full length of the stair flight or ramp run. For OSHA stair handrails, however, it can be just on one side. Handrails must be on both sides of the stairs and ramps.
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