scope:

This International Standard defines dimensions and specifies performance and safety requirements for traction assistance/tethering winches used in forestry for assisting supported machines while going uphill and downhill (pulling and braking). It is applicable to fixed and detachable winches and their components, connections and communications, which are used with mobile and self-propelled forestry machinery as defined in ISO 6814 such as harvesters, forwarders, skidders, planting machines, machines for forest ground preparation and machines for extracting residual waste. These machines can be equipped with wheels and/or tracks. It is applicable to autonomous traction assistance winch systems which are installed on a position away from the supported machine too. It is not applicable to traction assistance winches which are not using a controlled rope force while going downhill and winches used for skidding, hoisting operations on cranes, draglines, high lead logging, rope, logging systems or yarding. The safe use of traction assistance systems covered by this standard requires the supported machines to be able to remain at least stationary on any position of the slope they are driving on without using rope support.