Attach one of these to each end of a 'MRBK Wood Trestle 02' or similar to complete the frames.
Attaching two of these together end-to-end results in a complete 4-span (64ft) bridge.
This is a 'Rails' track asset, so it can be curved and straightened like regular track.
Spline points should be adjusted so the ties are square when viewed from the side.
This mesh should add only 2 supports and complete a third support at each end of the bridge.