Box with PVC interlocking system
This system is used both when the frame is at the centre of the wall and with frame flush with the inner wall. It is designed using a panel, which is fastened by screws to the box profile. The box opening takes place through the screw fastening removal.
For size exceeding 1,50 m. a central fastening of the top-cover is provided to avoid deformations. It is essential to arrange some “Z” type aluminium profiles at the base of the box, when the closure with PVC top-cover has been chosen.