9.8.7.2. Continuity of Handrails

 This Article indicates where handrails must be continuous and where they can be interrupted. Continuous handrails provide directional cues for sight-impaired persons and reduce the risk of falls for persons with mobility impairment who rely on handrails for support. The guidance and support provided by handrails is particularly important at the beginning and end of ramps and flights of stairs, and at changes in direction, such as at landings and winders. 

For stairs and ramps serving a single dwelling unit or a house with a secondary suite (including their common spaces), handrails must be continuously graspable throughout the length of ramps and flights of stairs, from the bottom riser to the top riser, but are permitted to start from a newel post or volute installed on the bottom tread (Figure 9.8.-13). For other stairs and ramps, at least one required handrail must be continuous throughout the length of the stair or ramp, including at landings except where interrupted by doorways. 

Quoted from Illustrated User's Guide - NBC2015