Justin, I ordered scale lumber for ties, then cut to length then glued them to the stringers. 1,100 of them. I bought Atlas flex track then pulled the rails out, bent them to the shape of the curve of the trestle. I had a friend helping me - we measured the distance between wheels on a locomotive and used that as a guide. I hand spiked every rail. 6,600 spikes. I later addeddrift timbers on the edges of the ties. Don