(UNI EN 107 - UNI 9158)
Mechanical tests carried out on a window determine the effort needed to open and close it; enable the verification of its reaction to mechanical stress, through the simulation of potential misuse; evaluate the effectiveness of its locking and opening mechanisms; and investigate the appropriateness and durability of the frame and accessories. According to regulation UNI EN 107, different windows are subjected to different types of stress. After completing the test, the window is checked for unacceptable breaking and warping, and to ensure that its operability has remained unaltered.
Acceptance limits are defined by regulation UNI 9158.