The main focus of this paper will be developing a device for mounting the frame access openings. It will also analyze possible ways of mounting frame, and based on the requirements and aims the best solution will be chosen. In order to develop the device for mounting Al frames, based on the selected method of assembling the frame, it is necessary to design the structure of the device. There will be presented several concepts of the design solutions for the device for mounting frames. and it will be selected the optimal solution.