There seems to be a difference in philosophy about what to make the legs out of and how to mount them to the module.
The philosophy at Ottawa Valley HOTRAk
http://www.hotrak.ca is that light is good and heavy is bad, especially when you have to truck your modules, your legs, and all of your equipment up and down the stairs. Another part of the philosophy is that the modules, the legs, the wiring, and the track have to be designed for quick set-up and take-down. And, of course we want a high degree of standardization so that when the modules are being assembled, we are all using the same methods.
The height from the floor to the top of the rail is 45". The width at the interface between module sets is 24". The legs are made of 2"x 2" with a 5/8" threaded rod (I cut off a length of a carriage bolt) securely inserted into the top of the leg. The threaded rod screws into a T-nut which is fastened to gussets in each corner of the module.
With the help of another person, it takes less than 10 minutes to bring a module setup into the hall, unbolt the carryplates, screw in the legs, set each module up on its legs, ready to be incorporated into the layout. If you have several modules which form a set, the 10 minutes includes butting the modules in the set together and fastening them together, perfectly aligned and ready to be incorporated into the layout.
For incorporating the modules into the layout, we usually have two "track gangs" working both ends from a central point. A couple of guys lift the module into place, the "straw boss" gives instructions as to which way it goes - left, right, up down - and another guy is underneath on the ground ready to clamp the modules together with some C-clamps. The trailer plugs for the track power and the LocoNet cables are connected together.
Another crew comes behind (although not usually at the same time) and inserts the 6" joiner tracks.
It all goes very smoothly and quickly because everything is standardized, but the work also has to be organized.
Bob M.