A new type of adjustable prefabricated staircase with a handrail to the site.

摘要

Lateral devices constituted by Two Faced, symmetrical with respect to the line of Fingerprint and matching lines of Lemon, and Co actuanen support the steps.Each device is armed along Three barrasdiagonale s (3) (4) and (5) linked by yparantes Stepping Stone Plates (6), (7) and (8).