This document is applicable to all types of heavy rail freight wagons. This document specifies the minimum requirements for ergonomic and structural integrity of steps and handrails used together to give staff access. It does not cover ladders, top platforms and top gangways. It defines in particular the required free spaces necessary for shunter handrails, for shunter s stand, for steps and handrails. This document also defines their dimensions, positions, limits for durability and functionality. It also defines the general requirements for the access to tail lights.