One of the challenges with building Pembroke in a house that is still under renovation is that some of my research material is buried. While the basement has been largely finished since before Christmas -- don't ask me about baseboards and that closet door -- there are still shelves and various cabinets to construct. So, I've been relying mostly on information on my Canada Atlantic research website and on my Flickr stream (mostly not public). One critical photo lives only in a BRMNA book, and it shows the relationship between the mainline and the area around the engine house.

For some benchwork is boring but I enjoy it - to a point.  There's nothing new or innovative in what I'm doing but I'll continue posting so you can follow along.

Will this support plan wind up warping later? 

I'm in a climate controlled basement. Temps do vary by 10 degrees or so summer to winter but humidity level is relatively constant. Plywood deck is 3/4 inch birch cabinet grade. I had to modify my support structure so I now have the upper deck here supported on the sides of 1x2 strips ripped from plywood. I needed the extra height for the deck, and I new with a 24 inch wide section that the upper deck needed some lateral support under it or it would sag.

Elsewhere on this site there has been some discussion on using foam board and sound issues.  I am planning on using 2" extruded foam board as the top for my wood bench work without using any plywood.  The foam would also serve as my sub-roadbed on which I would use adhesive caulk with either traditional cork or the WS foam roadbed.  I thought that I would like to use the foam for the bench top because of how easy it would be to sculpt the land forms.