The Walthers Cornerstone Arched Pratt Truss Single-Track Railroad Bridge is based on a common North American design used by many railroads to handle heavier trains. This deck truss bridge offers more clearance below and is ideal for steam, classic diesel and modern-era scenes. It also features simulated steel construction with detailed girders, lattice work and rivets. Use with Walthers Code 83 Bridge Track #948-886 or #948-899, both sold separately, or your own choice of track age. Parts are molded in dark gray.