Wooden string-board for a staircase/steps has upper and lower cheek parts interconnected with a positive fit using joints, gluing and screwing

摘要

A wooden string-board (1) forms two parts in a lengthwise direction. One upper cheek part (3) has a shaping for steps (2) and links to a lower cheek part (4). The upper and lower cheek parts interconnect with a positive fit, e.g. by means of a dovetail joint, a mortise joint, a tenon joint, etc. They are also interlinked by gluing/screwing. An independent claim is also included for a system of stairs/steps with string-boards.