scope:

This document applies to brake block holders and brake shoe keys installed on railway vehicles.
Brake block holders and brake shoe keys made of non-ferrous materials are not subject of this document.
This document contains the requirements for production, production monitoring, design, testing, quality assurance and certification.
The requirements cannot be laid down in such detail as to ensure defect-free design and production without obstructing further development. It is therefore necessary for each manufacturer himself to take all requisite steps to ensure on his part that the quality of design and production are state of the art.
The requirements contained in this document apply to the brake block holders and brake shoe keys with which the railway vehicles of main-line railways, private railways (regional railways, company railways) are fitted.