Many good variations on this post.
After having experienced a move and having built a lot of Free-Mo modules I chose to approach my present RR a tad different.
My RR has only a few legs. I mounted knees on a block wall and set module frames on the knees.
Next, a series of progress photos from above pic. The module for the yard top right of above photo was flipped to allow for an aisle behind the yard. Then, as extra track was planned to be added there would be a need for a passenger station and freight station foot print so Eminent Domaine was exercised by splicing in 1/2" plywood into the Homosote veneer. The freight foot print had to be enlarged again with a deeper and longer base. There is a series of bump out growths all over the layout due in part to the napkin based wet thump drafting department. I initially had installed 110 outlets at the base of the fascia all around the layout but with all the bump out expansions many of them are now several inches behind the fascia.
Since this photo another TT was added to the guitar module to spin the yard goats. To gain perspective the distance from the line of clamps near bottom to the red pad of the Topside Creeper at top right is 40'.
The modules are units glued together and bolted to adjacent modules so portability is kind of in mind. More for my executor than me. My next move will be in a hearse.
My frames, some of which were in my last layout were all glued and clamped together in approx. 3' X 6' to 8' lengths. No screws. I set them on the knees like a Domino game. I had to shuffle some of them to fit the new digs. Actually turned some upside down to fit in a aisle.
Personally I find using all plywood construction to be more stable than dimensional lumber and revenue neutral. I get thirteen 3.5" X 8' X 3/4" boards from an 4x8 of shop Birch.
I uses Titebond III for close surfaces and Loctite's premium urethane for irregular glued surfaces.
A fellow 0 scaler who was transporting one of these modules at highway speeds had it fall out of his PU bed at 55 mph and it only got scratches. We also did some destructive testing; the glued joints did not fail but the plywood fractured.
I used to use Titebond III by the gallon.
