150-880 - Cd 100 Girder Sngl Track - HO ScaleThrough Plate Girder Bridge with Code 100 Track Kit Single Track (black) The Atlas Through Plate Girder Single Track Bridge is a great addition to any HO layout. It's based on one of the most common bridges in use across the continent. It comes equipped with Code 100 nickel silver Atlas Snap Track with realistically spaced brown bridge ties. This easy to build kit includes parts for a single track bridge. A double track version of this bridge kit is