Here you see a before of the train car with the metal roof and deck removed. You can see from the lines in the photo on the left that the old roof had caused sagging in the rafters.
Two new sisters were put in place at the far left end and the new metal roof installed is shown on the right side.
If you take notice of the notches in rafters, the original 2×4” stringers are 37’ long.
The deck used custom 1 x 10-12”s running the length of the railcar.