127897 ⎘
Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
Bridging system
#2MOBILE BRIDGE AND METHOD FOR ERECTING A BRIDGE
#3Supporting arch structure construction method
#4Tilt-lift method for erecting a bridge
#5Methods and apparatus for forming and placing generally horizontal structures
#6Methods and apparatus for forming and placing generally horizontal structures
#7Methods and apparatus for forming and placing generally horizontal structures