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This standard specifies the method to be used to determine the mechanical durability of doorsets and the opening parts of windows after a defined number of operating cycles. It applies, whatever their construction materials and operating systems, to any window or any door in the form of complete assemblies in normal operating conditions. The parts concerned in the testing are the frame, the opening elements (including any secondary elements) and all essential hardware, including operating devices. It does not include any additional fasteners such as pegstays or cabin hooks, nor any independently installed restrictor. In this standard, it is assumed that the operating cycle imparts movement to ancillary items such as hinges, stays,balances and other mechanisms.