This Bridge Looks At Home on any Post-1920s Layout 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 of tracks. This style of bridge is common across the continent, so it will look great on any N Scale layout. Through Plate-Girder Bridge Kits: Single Track Double Track Single Track Add-On