Stair Rails

Stair rails must be installed along each unprotected side or edge of a stairway with four or more risers or one that rises more than 30 inches in height, whichever is less. Stair rails consist of the top rail, sometimes also used as a handrail, the intermediate rail, and the posts. Stair rails installed before March 15, 1991 must be placed between 30 inches and 34 inches from the upper surface of the stair rail to the surface of the tread. Stair rails installed after March 15, 1991 must be placed at least 36 inches from the upper surface of the stair rail to the surface of the tread.

A mid-rail, screen, mesh, or an equivalent vertical structure must be provided between the top rail and the steps. If a mid-rail is used, it must be located midway between the top of the rail system and the steps. If other vertical structures are used between the posts, such as balusters, they must not be more than 19 inches apart.

The stair rails should be designed from a surface that prevents injuries from any type of punctures or lacerations. The surface should be smooth enough that clothes won't snag on it, but the surface should also provide sufficient grip. The ends of the stair rail system must be designed to prevent any dangerous projections. These hazardous projections may include a rail that extends beyond the end post.

To learn more about Ladder & Stairway Safety visit our Ladder & Stairway Safety Online Training web page.