The scope of this document is: to establish 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; to list the minimum requirements for the manufacture of crossings with moveable parts and/or their constituent parts; to formulate codes of practice for factory inspection and tolerances for crossings with moveable parts and/or their constituent parts; to establish the limits and extent of supply; to list the method by which crossings with moveable parts and their constructional parts should be identified; to list 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.