2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017

11B-505.10.3 Bottom extension at stairs.

At the bottom of a stair flight, handrails shall extend at the slope of the stair flight for a horizontal distance equal to one tread depth beyond the last riser nosing.  The horizontal extension of a handrail shall be 12 inches (305 mm) long minimum and a height equal to that of the sloping portion of the handrail as measured above the stair nosings. Extension shall return to a wall, guard, or the landing surface, or shall be continuous to the handrail of an adjacent stair flight.

[2010 ADAS] 505.10.3 Bottom Extension at Stairs.  At the bottom of a stair flight, handrails shall extend at the slope of the stair flight for a horizontal distance at least equal to one tread depth beyond the last riser nosing. Extension shall return to a wall, guard, or the landing surface, or shall be continuous to the handrail of an adjacent stair flight.

FIGURE 11B-505.10.3 ‡‡
BOTTOM HANDRAIL EXTENSION AT STAIRS