1 Scope
This document:
establishes the design process for switches and crossings (S&C), and the use of the other parts of this standard;
specifies the geometric design principles for wheel guidance;
establishes the basic limits of supply;
establishes the applied forces and their adequate support;
specifies tolerance levels.
These are illustrated herein by application to a turnout. The main switch and crossing components are represented in turnouts and the principles used in turnouts apply equally to more complex layouts.

