The main file used to reconstruct the Iron Bridge was downloaded from Thingiverse, the original design can be found here: https://www.thingiverse.com/thing:10173 A lot of the original file has been modified so that it could be cut using 1mm acrylic and so that it could be better scaled to be 1:87th scale (HO Scale). Additionally a number of extra details were added.
The files have no instructions so once the parts are cut it's a bit of a puzzle working out how everything is assembled, I suggest going back to the video and having a careful look at the bridge from different angles and that should help you figure out the way it is assembled.
The main thing to note is all the files have been adjusted to be cut with 1mm material, whether that is acrylic, polystyrene, MDF or wood it's really up to you 😉
License: Legal notice for all .SVG files pertaining to the Bridge and Bridge Abutment models.