Aluminum is low density metal, remarkable for its ability to resist corrosion and atmospheric conditions due to the phenomenon of passivation. The yield strength of pure is 7-11 MPa, while aluminum alloys have higher yield strengths. The Aluminum profiles which are used in the FA system are extruded by pushing an aluminum Billet, through a die with the shape required. For every extrusion there is proprietary die that can be modified at the customer request. The dies can be custom-made according to customer's request and suited to the various construction needs.