Gantry crane price is similar to a bridge crane, but instead of moving on suspended runways, the crane uses legs to support the bridge, and the electric hoist. The crane legs travel on fixed rails embedded in, or laid on top of the floor. Gantry crane is used in an outdoor or indoor applications where full beams and columns can’t be installed, or may be used below an existing bridge crane system.
link:https://www.kinocranes.sg/gantry-crane/gantry-crane-by-capacity/70-ton-gantry-crane.html