Architectural · A-HCF8Y

Stair Handrails

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Stair handrails are mounted at a height of 34 inches to 38 inches to the top of the gripping surface above the stair nosings, maintaining a one-and-one-half-inch minimum clearance from adjacent wall surfaces. The handrail gripping surface measures one and one-quarter inches to two inches, with smooth edges and a minimum radius of one-eighth inch. Stair nosings are detailed in four configurations including Type A flush riser, Type B angled riser, Type C curved nosing with a maximum half-inch radius, and Type D beveled nosing. Undersides of stair nosings remain free of abrupt changes, utilizing a beveled slope or non-square underside with a maximum one-and-one-quarter-inch projection.

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