Device for fixing and erecting, rapidly, staircase treads (steps) on an unlimited number of support strings, of any inclination, shape and figure in space

摘要

The invention relates to a rapid staircase-tread erecting device. ly consists of a conical piece 1 whose lips 2 ensure the retention of the male conical piece 3 and an angular wedge 4 ensures the horizontal retention of the tread 5. The device according to the invention is more particularly made for the erection of staircases of various geometrical shapes launched into space and laying claim to a certain aestheticism, but it meets all architecturally related requirements.