Step-free Staircases
Steps made of profiled iron frames with inlaid wooden treads and coverings, welded to a support tube. The outer edges of each step are connected to each other by a round tube, which supports a stiffening handrail and a stiffening balustrade stringer. The iron components are painted in alternating colours. 2. Spiral staircase in an exhibition pavilion. Checker plate treads are welded to conical web plates. The steps are attached to the support tube. At wider intervals, support columns are welded to the outer sides of the steps, which in turn support two sheet metal stringers and the handrail.
