This code of practice was prepared in collaboration with an ad hoc international group of experts established by the FAO/ECE/ILO Joint Committee on Forest Working Techniques and Training of Forest Workers. It embodies the knowledge and experience of many countries. Although couched in the language of a set of rules, it has no binding force but is intended to give practical advice to all persons who have a responsibility for safety or health as affected by the design or use of chain saws, or who may be framing provisions on the subject. Contents: scope; definitions; manufacturing requirements (section on each part of the saw; weight, noise, exhaust fumes, vibration isolation; operating instructions); preventive maintenance; employers' and operators' duties and responsibilities. Appendices: tabulated and illustrated data on handle strength and clearances; noise; vibration; etc. Includes diagrams.