Besides the brass bridge that I built last November for the loop on the upper line to pass over the loop on the lower line, there was going to be another bridge needed to bring the front end of the loop back over the yard ladder of the lower yard. This curved bridge was built of tempered hard board. I thought that it would be great if the bridge could be made removable in case that yard ladder ever had to be worked on.
For more details on how I work with this material, see the post Staging yard track gaps.
In this photo one of the screws that hold the bridge in place can be seen.
At this point the road bed is in for most of the upper yard and enough track is in on the return line so that this bridge has been thoroughly tested. Some more turnouts have been built and track laying in the upper yard can proceed soon..