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MEDIUM GIRDER BRIDGE (MGB)

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.


All information and pics are from http://www.army.forces.gc.ca/lf/English/2_0.asp