This is a standard that has been around for many years. It is one that is pretty common and seen around the world. The basics of this standard is modules that are 2 feet deep with lengths varying in increments of 2 feet. The modules are setup at 40 inches from the floor to the rail. There are three tracks that run primarily along the front of the modules. To connect the modules together they get clamped together with C-Claps. Tracks are connected with 5 inch straight tracks. And power connections between the modules are done with Anderson Powerpoles.  You can find out further information here NTRAK (nrail.org)