cut stringer

open string

An inclined board in a vertical plane, parallel to the slope of a stair (i.e., a string), whose upper edge is cut to fit the profile of the treads and risers of the steps; the treads of the stairs project beyond the face of the string and are visible; compare with closed string.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Cut stringers for conventional stairs can leave as little as 4 in.