FORESTRY / SAFETY KNOWLEDGE
Tree Felling
& Safety.
Understand the hazards. Read the forest. Put safety before the cut.
Explore the diagramsEducational diagrams. Not a substitute for professional training or a site-specific felling plan.
Danger & Falling Zones
The falling corridor is only part of the danger area. Plan the exclusion zone, communication and retreat before work begins.
Keep uninvolved people at least two tree heights from the stump. Slopes, unstable trees and site hazards can require more distance.
Read the safety explanation
Agree signals and keep the tree crown in view while retreating. A wider exclusion area may be needed for rolling timber, broken tops or trees struck by the falling tree. Stop if anyone enters the controlled area.
Illustrative geometry. Not to scale. Green arrows indicate retreat direction—not a guarantee of safety.
Chainsaw Kickback Safety
Contact at the upper quadrant of the guide-bar tip can throw the bar rapidly upward and back toward the operator.
Keep the bar nose clear of branches, logs and the ground. Use both hands with a firm, enclosing grip and maintain balanced footing. Do not cut above shoulder height.
Motion is deliberately slowed. Real kickback can be sudden and violent. Never try to reproduce this reaction.
Read the safety explanation
A chain brake and low-kickback cutting equipment reduce risk; they do not eliminate it. Follow the saw manufacturer’s instructions for the matched bar, chain, sharpening and tension. Pinching the chain can also create dangerous reactive forces.
Directional Notch Cutting
A conventional directional notch is shown here: a 45° opening with an illustrative depth of 1/5–1/4 of the trunk diameter.
The inclined top cut meets the horizontal bottom cut precisely. The 45° angle describes this conventional notch, not every felling technique.
Read the safety explanation
Guidance differs: the ILO describes a 1/5–1/4 depth for its stated technique, while OSHA describes 1/4–1/3 and distinguishes conventional from 70–90° open-faced notches. Do not combine these into a universal cutting recipe. A competent faller selects the technique for the tree and conditions.
Choosing the Falling Direction
Choose a clear falling corridor while assessing the tree, surrounding canopy and ground—not just an arrow on a plan.
Assess height, natural lean, crown weight, wind and room for the whole tree. Nearby branches can interlock, divert the fall or leave a tree hung up.
Example forest only. Highlighting a corridor does not approve a real felling plan.
Read the safety explanation
Check the tree and site from all sides. Defects, decay, slope and changing weather may invalidate the planned direction. Arrange communication, first aid and emergency access. A diagram cannot determine whether a real tree is safe to fell.
Sources checked · October 2026
Technical references
Content cross-checked against the published guidance below. This page is not endorsed or independently certified by these organisations.
A safer project begins with a professional assessment.
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