Steel gratings are also known as pororos, they are modern building elements used for staircases, walkways, grandstands, bridges, soffits, railings, etc. The construction of pressed steel floor gratings made of structural and stainless steels is characterized by low own weight, easy assembly, eventual dismantling and simple they replace individual parts. They are highly variable, letting light and air pass. In all shapes, they are rigid, durable and with a suitably selected material and finish, with regard to the environment in which they are used, they also have a long service life. Staircase pressed steel floor gratings have obtained the CONSTRUCTION TECHNICAL CERTIFICATE No 070-024961 of 12.1. 2005.