Self-supporting box for underground automations to be combined with actuator EM73N code 41060/001. Self-supporting 400 Kg. 
Equipped with a release device, this box allows the jack to work without being stressed by the weight of the gate, as it is supported by the structure of the box itself. 
It also allows easy maintenance or replacement of the automation, as it is not necessary to remove the leaf from its hinge.