 Folding Boat Equipment Mk III bridge in North-west Europe (1944-45) | |
| Ancestor | Pontoon bridge |
|---|---|
| Carries | Pedestrians, Road vehicles |
| Span range | Short |
| Material | Timber, steel, canvas |
| Falsework required | None |
The Folding Boat Equipment, abbreviated as FBE, is a light pontoon bridging equipment which was in use by the British and its colonial armies during the 20th century.[1] The equipment was introduced in 1928 and was the standard light bridge used for loads up to class 5, i.e. providing rafts or a bridge capable of transporting loads up to 5 tons of weight. The initial version was followed by a Mk II but without change of capacity. In 1938 the Mk III version of the bridge was introduced with significant changes and an increase of load capacity to 9 tons, i.e. load class 9.[2]
The Mk III version of the bridge was easy and quick to erect, which led in 1939 to its becoming the standard light bridging equipment, initially of the British armies, and the Allied armies during World War II. The Mk III equipment was capable of providing class 5 and 9 pontoon rafts, or a class 9 bridge. The equipment provided anchoring facilities and a full width trackway. It performed well even in fast currents and could be maintained and kept in use indefinitely.[3]
The FBE Mk III was used extensively during World War II by both British and American forces as the standard class 9 bridge. The FBE was widely used in both the European and South-East Asian theatres of war.
The equipment provided the following capabilities:[4][5]
Bridges are constructed by joining rafts together. The connectors have limited articulation,[6] which permits the FBE Mk II bridge to carry a load of class 5 while an FBE MK III bridge can carry a vehicle of load class 9 (approximately 10 tons). The trestles are set up at each end and fix the end of the bridge to the bank. Anchors are placed at different positions along the length to anchor the bridge from being swept away by a changed current.
Folding Boat Equipment bridge consists of the following parts:[6]
Each folding boat was 21 feet 10 inches long and 6 feet 8 inches wide, collapsible and could be carried flat on four-wheeled trailers or in bridging lorries. Three flat boats fitted on a trailer. Sixteen soldiers were required for manual carriage and launching a single boat. Each boat had a load capacity of 870 pounds and could accommodate 16 fully armed soldiers besides the boat commander and a crew of four.[5][6]