This fixing is designed specially for use in aerated concrete (aircrete). As a result of the spiral shaped outer ribs, the total diameter of the fixing achieves roughly double the core diameter or drilling diameter and thus provides favourable pressure distribution in the aircrete in the case of both shear and axial tension. The fixing achieves its optimum load-bearing capacity only if the fischer safety screw is used. For fixing in the external situation (e.g. facades) or in moisture-proof rooms, safety screws made of stainless steel A4 are prescribed. The fischer Aircrete fixing GB 14 possesses building inspectorate approval for fixing in the tension zone produced from load tension in reinforced roof and ceiling slabs made of aircrete GB 3.3 and GB 4.4. For fixing of: For facade and roof substructures in wood and metal, windows, doors, gratings, brackets, pipelines, suspended ceilings, cable trays, steel and timber constructions, sanitary elements etc.
