This document specifies safety requirements and measures for their verification for the design and construction of portable, hand-held, pole-mounted powered pruners with a backpack power unit (hereafter referred to as “machine”). These machines use a power transmission shaft to transmit power to a cutting attachment consisting of a combination of saw-chain and guide bar, a reciprocating saw blade or a single-piece circular saw blade with a 205 mm maximum outside diameter. Methods for the elimination or reduction of hazards arising from the use of these machines and the type of information on safe working practices to be provided by the manufacturer are specified.d edition 2021-10 Machinery for forestry — Safety requirements and testing for pole- mounted powered pruners — Part 2: Machines for use with backpack power source Matériel forestier — Exigences de sécurité et essais pour les perches élagueuses à moteur — Partie 2: Machines pour utilisation avec source motrice portée à dos Reference number ISO 11680-2:2021(E) ？ ISO 2021 ISO 11680-2:2021(