tigerman-
the bailey bridge was a special bridge that was designed by the Allies in WWII. it was a flat steel gertter structure, which was pre-assembled in sections, and which could then be quickly put together by field engineers. it could be used to cross small creeks and such, or could be rrested on pontoons to cross rivers.
the bailey bridge is a highly effective design, which I believe is still in use to this day. I think the U.S. Army still has some for its own use, and some are even in the hands of private contractors. In fact, when they were rebuilding a state road through my town, they used the bailey bridge as a temporary span over a wide creek, while they built a more permenant structure.
a bailey bridge is almost entirely made from lenghts of steel, along with a corrogated road top. this makes it fairly easy to replicate using strip and sheet styrene.
And now after saying all that, I have no idea what the plans are for it.
sorry pbrull, but never fear someone should come along and help a bit better than I.