Stairs have a shell for the steps and a pre-made case that has vertical struts that are fixed to the ground, can be adjusted during building to form different tread heights

摘要

The stairs have a shell (10) for the steps and a pre-made case (11) that has vertical struts (12) that are fixed to the ground. The step height can be adjusted as desired and are attached to the side walls of the stairs. The stairs have vertical spindle-like support struts and an adjusting unit and the struts fit into longitudinal support holes.