150-2081 - Cd 55 Bridge Kit 2Trk - N ScaleCode 55 Through Plate Girder Bridge Kit Double Track The Atlas Through Plate Girder Bridge is based on prototypes with a bridge deck supported between two plate girders. This type of construction gives it an easily identifiable U shaped cross section. Available in single or double track variations, this easy to build plastic kit includes Code 55 track with brown ties and nickel silver rail. A convenient add on kit allows you to add an unlimited number