Atlas O Scale 3-Rail Single Track Pratt Truss Bridge Features: 40 inches in length, overall height of 9. 5 inches (from the bottom of the deck to the top of the bridge), clearance for any piece of rolling stock currently available, including scale double-stack, container cars and double deck autoracks, full details on all bridge girders and deck members, internal steel structural pieces which allow for accurate see-thru deck construction, choice of single or double track versions, atlas o track included.