English to Greek Tech/Engineering Construction / Civil Engineering elevator-lift platform

Installation of mast :Transport all mast pieces into position as set out in the figure. Before joining the mast pieces, at the connection box and cables to the upper mast piece.

I have also found this in the internet: A building elevator having an elevator mast and an elevator car cabin, said elevator mast having a rack and at least two drive motors being disposed one above the other on said elevator cabin; each said drive motors having a pinion engaging into the rack to drive the cabin along said mast, with an overload safety apparatus being provided which has a device for totaling the forces arising in the counterbearings of said drive motors; and said device is connected to an end switch.