We have displayed this layout 3 times at the Chilliwack B.C. model train show over the last 7 years but that has been the only venue for Canada that we have done.
A few of the stats of the layout is that the only thing permanently mounted (other than some small items glued to the shelves of the store buildings) is the track itself...............as far as where the boards come together, its just a piece of track that is not connected until the boards go together to bridge the gap of the already mounted track pieces.
Yes it is 36 feet by 16 feet for the overall diamater and its 4 feet wide all around which gives us and interior space of 8 feet by 28 feet, a perfect amount of space to still move around, have a table, chairs, a tool box and a place for our custom carts to double as storage/work spaces.
3 of the boards are complete 4 by 8 foot sections, 2 boards are 4 by 4 foot sections and the remaining boards are all 2 by 8 foot sections.......they are all numbered and have a very specific placement to the setup of the layout.
The legs are comprised of PVC pipe that I belive is 2 1/4'' diamater (dont quote me on that though)