Perimeter protection - In construction was used nylon net attached by wood or metal, now using steel cables. The steel cable is flexible, which ensures manuseibilidade on installation and does not impact the employee, to be flexible and work within the rules. Thus a project is done in autocad to show how to install the nylon net and how it is set in the floors of new buildings. The Mechanical Engineer is who has the legality of this application, so it issues a document that releases developer before the organs of public defense to the employee, plus other documents to the line effective implementation of existing security standards.