T-TRAK layouts are composed of individual modules with track that snaps together to form two parallel rail lines which are operated as individual mainline circuits.

The layout is designed to have 2 rows of modules arranged along a standard 76cm wide banquet table. The modules are normally made of 4 wood sides and a top surface of either wood or foam. Modules are 70mm tall with adjustable legs to allow for levelling at a height of up to 100mm.

The modules are varying widths, based on the track that will be used on them. And the depth of the modules are usually around 330mm. Module depth is normally kept at or below 330mm to create a cable 'trough' between 2 rows of modules on the table.

The 2 parallel tracks are mounted so that the outer edge of the front track roadbed is 38mm from the front of the module and the centreline of the two tracks are 33mm apart.