Medium Girder Bridge

In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including main battle tanks (MBT).

MGB was originally produced by Fairey Engineering Ltd. in Stockport, England, and is still made to this day by its successor WFEL, based on a design by MVEE in Christchurch.

Bracing with the additional lower deck dramatically strengthens the bridge allowing heavier loads and longer spans.

MGB can be built in various configurations to provide a full range of bridging capability for use both in the forward battle area and in the communications zone.

The MGB also requires very little maintenance once erected, is air transportable in either standard palletised loads or in partially assembled bridge configurations, and all US components will fit MGBs in use by allies (except for the launching nose cross girder posts) The bridge can be supported on unprepared and uneven ground without grillages.

Up to 9.8 m span with a MLC of 130 wheeled or 85 tracked The single-storey MGB bridge is constructed using top panels which are pinned together to form two girders and joined at each end by a bank seat beam creating a rigid framework.

The chains are suspended 2 metres (6 ft 6 in) beneath each bottom chord of the bridge and tensioned after building, by pulling the reinforcing posts into the vertical position.

The Link Reinforcement Set (LRS) is constructed when a long, high class type of bridge is required.

Although using an LRS provides a longer bridge span, it lowers the Military Load Classification (MLC) from 70 to 60.

MGB Double Storey multi-span bridges usually take the form of two or three span structures rated at MLC 70.

Powered pontoons are driven by a 75 hp (56 kW) diesel engine with a water jet propulsion unit.

It consists of vertical connecting posts with longitudinal hand rails, creating a continuous barrier along the edge of the bridge.