Small Box Girder

{{Short description|Tank deployed bridge used during WW2}}

File:Kanadische Truppen landen in der Normandie.jpg during the Battle for Caen]]

File:Churchill-AVRE-with-Small-Box-Girder-Bridge-and-Churchill-Crocodile.jpg

{{History of the tank|state=uncollapsed}}

The Small Box Girder bridge (SBG) was a small assault bridge that could be used to span gaps of up to 30 feet.{{cite web| url=http://www.canadiansoldiers.com/equipment/smallboxgirderbridge.htm | title=Time Money and Blood | accessdate=26 October 2012 }} It was typically carried on a tank, such as the Churchill Armoured Vehicle Royal Engineers (AVRE), and could be deployed without engineers having to expose themselves to enemy fire. The design had been formally adopted by the British Army in 1932. Pre-war the SBG had (more often than not without permission) quickly been copied by many countries around the world, including Germany. The German Army called their version of the SBG the Kastenträgergerät (K-Gerät for short).{{cite web |url =http://www.thinkdefence.co.uk/2011/12/uk-military-bridging-equipment-pre-wwii-equipment-bridging/ |title =UK Military Bridging – Equipment (Pre WWII Equipment Bridging) |author =Think Defence |date =30 December 2011 |website =www.thinkdefence.co.uk |publisher = |access-date =8 May 2017 |quote =The Small Box Girder bridge was copied and used by many other nations including Germany (where it was called the Kastenträgergerät or K-Gerät) and the United States where it was called the H-20.}} The United States was another country whose army created their own copy, designating it the H-20.

The SBG was used during the Normandy invasion of World War II (1944–5).{{cite web| url=http://www.timemoneyandblood.com/HTML/normandy/HobartsFunnies/hf_rampCarrier.html | title=Special purpose bridging — SBG & ARC | accessdate=26 October 2012 }}