I spent 20 years of my life with the Engineers in the US Army and the National Guard. One of the things we did was build bridges (and then blow them up!) One of the ways to cross a gap was to use a very large vehicle called an Armored Vehicle Launched Bridge, or and AVLB. I have spent years around the real thing, and my friend, this Lego MOC is just about as close to the real thing as you're gonna get. Excellent build!