TT Scale. The Ideal Scale.

The TT Nut module standards have been developed by members of this board.

The standards are meant to facilitate easily connectible modules within the constraints of NMRA or similar shows / exhibitions.
The modules are designed for two separate continuous loops to allow simultaneous running of DC and DCC engines. Therefore if there are cross-overs between the inside and outside lines, they must be able to be deactivated both mechanically and electrically.
All modules must adhere to track separation of 43mm / 1.69 inches. Minimum curves allowed have a radius of 353mm / 13.89 inches. Modules are connected together via use of Tillig 83mm / 3.26 inch G2 straight track.
Track height is 40 inches / 1016 mm from the floor and level at all module ends. Track slope at any point is a maximum of 4 percent.

There are three basic modules (click on pictures for full size versions):

1. The mainline module



2. The corner module



3. The staging module



Together the 3 basic types of modules are combined to form the following:



The 90^deg corner module is 2 feet by 2 feet / 609.6mm X 609.6mm. Two corner modules may be combined into a single 180^deg module which is 4 feet by 2 feet / 1219.2mm X 609.6mm. The module would look like this:



The mainline and staging modules are each 2 feet / 609.6mm deep and a minimum of 2 feet / 609.6mm long. Mainline and staging modules must be the same length. The above examples are each 4 feet long.

The staging modules are designed to allow for multiple tracks using a single or multiple modules such as this:



The staging module may be expanded for more lines such as this:



Corner and mainline modules must include an 8" / 203.2mm backdrop. The backdrop must fall within the 2 foot depth.
The following example of a module is taken from the NMRA's TT standards (with small edits):







This topic is meant as a reference and not a discussion therefore it is locked. For comments, questions, suggestions please see the following thread: viewtopic.php?f=3&t=171

For wiring the wiring standards, please take a look at the following document (thanks CSD for getting this done!):

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