Directional tree felling techniques are essential skills for professional arborists, landowners, and forestry workers who manage wooded areas. These methods allow you to control where a tree falls, minimizing risk to property, people, and surrounding trees. Mastering these practices transforms a hazardous task into a precise operation, ensuring safety and efficiency in every cut.
Understanding the Fundamentals of Tree Felling
Before diving into specific directional techniques, it is crucial to grasp the basic mechanics involved. A tree’s center of gravity shifts as the hinge wood—the living wood between the backcut and the face cut—thins during the felling process. Understanding how this pivot point works allows the tree to fall in the intended direction as the hinge fails. The goal is to manage the release of this stored energy so the tree follows your planned path rather than snapping unpredictably under stress.
The Critical Role of the Felling Face
The felling face is the first cut made on the side of the tree facing the direction you want it to fall. This cut determines the angle and initial movement of the tree. A common approach is to create a 45-degree open-faced notch, removing a wedge-shaped section of wood. This notch acts as a guide, encouraging the tree to tip in the opposite direction of the backcut. The top and bottom cuts of the face must be precise; if the hinge wood is too thick, the tree may hang up, while a hinge that is too thin risks the tree splitting or sitting back on the stump.
Open-Faced vs. Conventional Notch
Choosing between an open-faced and a conventional notch depends on the tree’s diameter and the required accuracy. An open-faced notch, typically 45 to 60 degrees, offers superior control for larger trees or situations where accuracy is paramount. A conventional notch, with a 90-degree angle, is faster to execute and works well for smaller trees where extreme precision is less critical. Regardless of the style, the top cut of the notch should be slightly higher than the bottom cut to create a clean, continuous hinge.
Executing the Backcut
The backcut is the second cut on the felling face, made horizontally just above the apex of the face notch. This cut releases the tree by severing the hinge wood that supports the tree’s weight. The key is to stop cutting before the tree begins to fall, leaving a small hinge of wood to control the descent. If the backcut is level with the bottom of the notch, the tree may fall before you are ready. Conversely, leaving too much hinge wood can cause the tree to lean back against the stump, creating a dangerous situation known as a "barber chair."
Managing Wind and Weight Distribution
Environmental factors play a significant role in directional felling, and wind is one of the most unpredictable. Even a light breeze can push a falling tree off its intended path, so always assess the wind speed and direction before starting. Heavier trees or those with a natural lean require adjustments to your hinge calculations; a tree leaning away from the target will need a slightly shallower notch, while one leaning toward the target requires a steeper one. Adjusting for these variables ensures the tree falls smoothly without twisting or jumping.
Using Felling Wedges for Difficult Situations
When dealing with large trees or those that bind against the stump, felling wedges become indispensable tools. These metal or wooden shims are driven into the backcut while the tree is still standing. As the tree begins to fall, inserting the wedges prevents the saw from pinching in the kerf, maintaining the integrity of the hinge. This technique provides the necessary leverage to guide a heavy tree down the intended path, especially in dense timber where the risk of the tree falling crooked is high.
