The Medium Girder Bridge is modular, lightweight, and can be assembled in a short period of time. The components can be easily transported by bridging trucks, trailers, or by helicopter.
The MGB is a two-girder deck bridge in which the wide upper surface of the girders and the deck units laid between them form a 4.0 metre-wide roadway. This system provides a quickly erected hand-built bridge capable of supporting up to 70 tonnes (single spans of up to 31 meters). For longer spans, the load-class is reduced.
This bridge is often used to construct a semi-permanent crossing site after a hasty bridge system such as the Beaver has been used. The Beaver bridge system enables combat vehicles to breech obstacles, and is then replaced by the MGB on key re-supply routes.
The bridge is constructed of several very simple modular components including top panels, bottom panels, junction boxes, and bankseat beams.
MEDIUM GIRDER BRIDGE (MGB)
Canadian Forces
