Product Overview

Summary: This specialised SOP integrates modern biomechanics with safe tree felling practice to reduce musculoskeletal strain and critical incident risk in arboriculture and forestry work. It provides clear, step-by-step guidance on body positioning, cutting techniques, and manual handling so workers can fell trees more safely, efficiently and in line with Australian WHS expectations.

Tree felling is one of the highest‑risk activities in arboriculture and forestry, with serious incidents often linked to poor body mechanics, awkward postures and uncontrolled forces acting on the worker and the tree. This Biomechanics of Tree Felling SOP goes beyond traditional chainsaw and felling instructions by focusing on how the human body interacts with tools, loads and dynamic tree movement. It translates biomechanical principles into practical, field-ready techniques that help workers maintain balance, protect their spine and joints, and better predict how the tree will behave as cuts are made.

The procedure covers pre-felling assessment, selection of cutting techniques, stance and grip, controlled use of force, and coordinated team movements, all framed through a WHS lens and aligned with Australian legislation and guidance. By standardising best-practice body positioning and movement patterns, businesses can significantly reduce manual handling injuries, fatigue and loss of control events, while improving productivity and decision-making on site. This SOP is ideal for organisations wanting to lift their tree felling practices from “experienced” to “evidence-based and defensible” in the eyes of regulators, clients and insurers.

Key Benefits

• Reduce musculoskeletal injuries by embedding safe body mechanics, lifting techniques and postures into every stage of tree felling.
• Improve control over tree movement and cutting forces, decreasing the likelihood of kickback, barber-chairing and unexpected tree behaviour.
• Standardise safe work methods across crews, supporting consistent training, competency assessment and refresher programs.
• Enhance compliance with Australian WHS duties for high-risk work, manual tasks and plant use in arboriculture and forestry environments.
• Optimise productivity by reducing fatigue, re-work and downtime associated with poor technique and preventable injuries.

Who is this for?

• Arborists
• Forestry Workers
• Tree Felling Operators
• Ground Crew and Spotters
• Utility Vegetation Management Teams
• Parks and Gardens Staff
• Local Government Tree Management Officers
• WHS Advisors and Safety Officers
• Site Supervisors and Leading Hands
• Training and Competency Assessors (Arboriculture/Forestry)

Hazards Addressed

• Musculoskeletal disorders from repetitive, forceful or awkward movements during felling and cutting
• Back and shoulder injuries from incorrect lifting, twisting and handling of logs, branches and equipment
• Loss of balance and falls on uneven, sloping or debris-covered ground while operating chainsaws
• Crush injuries from uncontrolled tree or limb movement due to poor stance or line-of-force management
• Chainsaw kickback and contact injuries linked to unstable body positioning and grip
• Overexertion and fatigue leading to reduced coordination, slower reaction times and poor decision-making
• Struck-by incidents from misjudged hinge wood, escape routes and tree lean dynamics
• Hand–arm vibration exposure exacerbated by poor tool handling and posture

Included Sections

• 1.0 Purpose, Scope and Application
• 2.0 Definitions and Biomechanical Principles (Centre of Gravity, Line of Force, Leverage)
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Applicable Legislation, Standards and Codes of Practice
• 5.0 Pre-Felling Assessment (Tree, Site, Terrain and Environmental Conditions)
• 6.0 Biomechanics of Body Positioning and Stance for Tree Felling
• 7.0 Safe Chainsaw Handling, Grip and Line-of-Force Control
• 8.0 Cutting Techniques and Hinge Wood Management from a Biomechanical Perspective
• 9.0 Manual Handling of Logs, Branches and Equipment (Lifting, Carrying, Rolling and Dragging)
• 10.0 Team Coordination, Communication and Spotter Positioning
• 11.0 Control Measures for Common Biomechanical Hazards (Fatigue, Slopes, Uneven Ground)
• 12.0 Personal Protective Equipment (PPE) and Supporting Ergonomic Aids
• 13.0 Step-by-Step Operating Procedure for Biomechanically Safe Tree Felling
• 14.0 Emergency Procedures and Incident Response (Struck-by, Crush, MSD Onset)
• 15.0 Training, Competency Assessment and Refresher Requirements
• 16.0 Monitoring, Review and Continuous Improvement of the Procedure
• 17.0 Document Control, Records and Revision History

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulation 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: Hazardous Manual Tasks
• Safe Work Australia – Guide: Managing Risks of Tree Trimming and Removal Work
• AS 2727: Chainsaws – Guide to safe working practices
• AS/NZS 2153: Tractors and machinery for agriculture and forestry – Technical means for ensuring safety
• AS/NZS 45001: Occupational health and safety management systems – Requirements with guidance for use