This document:
— establishes a working terminology for crossings with moveable parts, which means crossings with moveable parts to close the gap of the running edge, and their constituent parts, and identify the main types;
— lists the minimum requirements for the manufacture of crossings with moveable parts and/or their constituent parts;
— formulates codes of practice for factory inspection and tolerances for crossings with moveable parts and/or their constituent parts;
— establishes the limits and extent of supply;
— lists the method by which crossings with moveable parts and their constructional parts should be identified;
— lists the different and varying ways by which crossings with moveable parts can be described, using the following parameters:
— geometry of crossings;
— types of construction;
— performance requirements;
— design criteria;
— tolerances and inspection.