This article describes the original module standards developed for NZ120.  These pages are based on those first provided by Rod Murgatroyd and are republished here with his permission.

As far as we are aware only a small number of these modules have been built.  If you have any experience with this module system please add a comment to this article, or better yet start a discussion in the Forums about your experiences and any suggestions you have for making the module standard better.

Note that a new module standard is being formulated.  See the Forums and the Documents sections.

The Module Concept

The NZ120 module standard will allow NZ120 modellers to build one or more modules and to participate in occasional meetings where a number of modules can be joined to create a viable operating layout. The standard ensures that modules will connect and operate successfully.

Each module will carry a single mainline (with optional local passing loops, stations, trackside structures etc) in front of a backscene. The mainline will operate on a nominal zero gradient, that is, at the end of a module or set of modules, the mainline must be at the prescribed height and be flat. There is nothing however (other than the availability of suitable supports) to stop some of the modules being at a different Ground Zero to the rest of the modules, with a transitional gradient module between.

Behind the backscene there is a return track. The organisers will provide two balloon loops to allow the modules to be connected end on end (with the balloon loops connected at each end) to create a continuous running loop. The provision of a return track on the back of each module removes the need to manage the number of modules so that they form a closed loop (as has been the case with N-Trak). It also removes the requirement that each module be of a rectilinear format. As long as the prescribed dimensions are used at the module joints, a module can take any form. A module meet can consist of any number of modules (from one upwards), plus the two balloon loops. (As an aside, if enough modules of the appropriate lengths and geometry are available then it will be possible to create a closed loop and dispense with the return track).