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AVRE Small Boxed Girder Bridge
The Small Box Girder Bridge SBG, was one of a number of bridge laying vehicles available to the Army. The earliest version was based on a Valentine tank, and there were to variants of the Churchill bridge layer, The SBG and the Jumbo (based on the No. 2 tank bridge). All of the bridges had a 30ft gap crossing capability and could take up to class 40. Unlike the other two, which carried the bridge on top of the vehicle, the SBG held its bridge in front of it on a series of cables and could be raised and lowered using a winch fixed over the rear engine decks. The bridge was capable of bridging gaps with up to a 60 degree difference in angle/height, which as well as being remarkable, it also made it ideal for D Day and crossing the man made obstacles and natural barriers of the Normandy beaches.
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