Most people would like their doors to serve and resistant to the most extreme conditions them for as long as possible. We expect the service life of doors, which are an inseparable whole of buildings, to be close to the service life of the entire structure and to operate whenever needed it. Especially protecting our homes and workplaces from the outside; separating the corridors that lead us to the safest area in emergency situations from the places we are in; the doors, which are responsible for keeping away from fire, smoke, flood and similar environmental hazards, are always ready for service. In addition, doors can be exposed to very harsh conditions during daily use: frequent use, impacts, atmospheric conditions, static and dynamic loads, electrical and magnetic problems, etc. In order to increase the service life of the doors, it is essential to choose the material, design and application in the most appropriate way. When all these factors are considered, operating cycle times, which can call the service life of the doors, are determined with many test standards by the European Standards Committee.
