This standard specifies the minimum requirements of ergonomic and structural integrity of steps and handrails used to give staff access to passenger vehicles, luggage vans and locomotives or powered units for rolling stock of interoperable trains. It is also applicable for car carriers. This standard defines in particular the required space necessary for handling of screw couplings with side buffers, buffer handrails, shunter's stand. For staff access, it defines footsteps, handrails and their dimensions and free spaces. To fulfil the requirements for loads which are applied by the staff, it defines dimensions and requirements for materials or design loads. It also defines the general requirements for access to external equipment, for example windscreens, wipers or external lights. This standard does not cover OTMs (mobile railway infrastructure construction and maintenance equipment) and tram-trains. This standard can be applied also for rolling stock of non interoperable trains.