Details:

Inspired by a prototype Northumberland, Pennsylvania, this 18″ Through Truss Bridge is the first truly American 18″ bridge offered by Atlas. The HO Through Truss Bridge features simple, snap-together construction and specially designed bridge track.
Rivet detail
Simple construction; little glue required!
Kit includes 18″ Through Truss Bridge and track with bridge tie spacing
Size: 18″ x 5.25″ x 2.75″