The Medium Girder Bridge (MGB) is a lightweight, man portable bridge

Bridge

A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle...

 and can be assembled without help from heavy equipment. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including Main battle tank

Main battle tank

A main battle tank , also known as a battle tank or universal tank, is a tank that fills the heavy direct fire role of many modern armies. They were originally conceived to replace the light, medium, heavy and super-heavy tanks. Development was spurred onwards in the Cold War with the development...

s (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.

MGB was originally sold to the British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 in 1971, subsequently also being sold to many other nations including the Dutch Swiss and US Military.
The primary components of the MGB system are rectangular "top deck" segments, and triangular bracing "bottom deck" segments.