Hi, I have a couple questions about the floor in a USRA single sheathed box cars.
1. Many of the prototype photos seam to show the side sheathing sitting on top of the floor, suggesting that the floor boards run from the edge of the side sills, not inside the side sheathing. Would that typically be the case in 1919-1920 when these cars were built?
2. How were the wooden floor boards attached to the side and center sills' ship builder's channel. Was there some sort of clip? The USRA drawing suggest something next to the edge of the channels.
