A system for securing a screen door module to a platform extending along a route and having at least one upright at each end and a threshold between the end uprights. The system includes a first platform edge coping plate, a second platform edge coping plate, a first base mounted fixedly on one of the first and second platform edge coping plates, a second base mounted with the ability to move in a translational movement in a direction parallel or tangential to the route, and in a direction closer toward or further away from the first base on the other of the first and second platform edge coping plates, and means of securing and adjusting the end uprights on the first and second bases.