Tree Felling Direction (Determination Guide)
Choose a felling direction only after checking the tree’s lean, crown, condition, wind, slope, and every target it could reach. A clear landing area does not make a tree safe to fell if the trunk is defective or the lay is uncertain. If people, buildings, roads, or power lines cannot be kept clear, stop and call a qualified tree professional.
A common mistake is to assume a tree will fall where it is cut. In practice, its weight, lean, crown, defects, and the forces in its trunk all affect the fall. A notch and back cut can guide a sound tree within limits, but they cannot reliably overcome a strong lean or make a dangerous site safe.
I have seen landowners focus on the open patch of lawn while overlooking a heavy limb over a shed or a split hidden on the far side of the trunk. Start with the whole tree and its surroundings. If you cannot confidently choose a safe lay, do not make the first cut.
Equipment Setup and Felling-Site Safety
Before choosing a lay, inspect the tree, the work area, and your equipment. Tree felling requires training, protective gear, a working saw, and a clear escape plan. A saw that starts and cuts well is not proof that the job is safe; the tree and the site must also be suitable.
Check the site before starting
Look for people, buildings, fences, roads, vehicles, and other trees within the tree’s reach. Check for overhead and underground utilities. Underground lines may be a concern if the job involves later stump work, while overhead conductors can make felling unsafe even when the intended lay points away from them. Never fell near energized conductors without the required qualified personnel and clearance.
Set an exclusion zone and tell everyone nearby to stay out. OSHA’s logging rules, 29 CFR 1910.266, apply to covered logging work; they are not a substitute for checking the rules that apply to your job. ANSI Z133 is an important tree-care safety standard. Use a site plan and training suited to the work. As a conservative distance where practicable, keep people at least two tree lengths away. A greater distance or a larger controlled area may be needed for the site.
Plan two escape routes that lead diagonally away from the expected fall, not straight back along the trunk. Clear brush and trip hazards before starting. Wear appropriate head, eye or face, hearing, leg, hand, and foot protection. Inspect the chain brake, throttle interlock, chain catcher, handles, controls, chain tension, and bar. Do not disable safety features.
Match the saw and cutting parts
Use only manufacturer-approved combinations of saw, guide bar, chain, and drive sprocket. Chain pitch, gauge, drive-link count, and bar mount must match the specific setup. A chain that looks close may still be incompatible. There is no reliable universal rule that pairs bar length with engine size. Longer bars add load and leverage and can increase kickback exposure.
Follow the saw manual for fuel, oil, chain tension, and service. A 50:1 fuel mix is common, but it is not universal; use the exact grade and two-stroke oil ratio stated for your model. Use the specified bar-and-chain lubricant, and check oil delivery by the manual’s procedure.
Set chain depth gauges, also called rakers, to the chain maker’s specification with the correct tool. A .025-inch setting is common on some chains, not a universal value. Rakers set too low can make a chain grab more aggressively and raise kickback risk. Use the manual’s idle and maximum-speed figures and tachometer procedure; there is no safe universal RPM setting.
Assessing Lay and Executing the Felling Cuts
The lay is the planned direction in which the tree is meant to fall. Choose it by weighing the tree’s natural forces against the site’s hazards, then decide whether those forces can be controlled. If the likely fall path is uncertain, or a target cannot be protected, do not fell the tree.
Assess the tree and likely direction
Stand well back and inspect the tree from more than one angle. Look for trunk lean, a lopsided crown, dead or broken limbs, cracks, cavities, fungal decay, and signs of movement at the base. Note whether branches or nearby trees may catch the falling crown. Consider slope and footing: a tree on a slope can move or roll in an unexpected way after it lands.
Wind can change the crown’s loading while you work. Do not start if gusts, poor visibility, wet or unstable footing, or changing conditions make control uncertain. Species alone does not tell you whether a tree is safe to fell. Wood hardness is not a reliable shortcut either; diameter, soundness, defects, and saw capacity all matter.
| What you observe | What it may mean for the lay | Practical decision |
|---|---|---|
| Sound tree with a slight lean toward a clear area | The natural lean may support that direction | Consider only if the whole fall zone is clear and you are trained |
| Heavy crown on one side | Extra weight may pull the tree that way | Do not assume cuts can cancel the imbalance |
| Strong lean toward a building or road | The tree may fall toward the hazard | Stop and get qualified help |
| Crack, split, dead top, or major decay | The trunk may fail in an uncontrolled way | Do not use a routine felling plan |
| Gusty wind or poor footing | Direction and control may change | Wait or stop |
| Tree close to power lines | Severe risk of electrocution or line damage | Use qualified personnel and required clearance |
The table is a screening aid, not a way to certify a tree as safe. Even an apparently sound tree can hide defects. If you cannot see enough of the trunk or judge the forces acting on it, bring in an arborist or qualified felling professional.
Understand the notch, hinge, and back cut
A directional notch is an opening on the side facing the intended lay. The back cut is made from the opposite side. The hinge is the wood left between the notch and back cut; it helps guide the stem as it starts to fall. The hinge is not a guarantee. Its design depends on the tree and the method, and errors can cause loss of control.
A felling operation should follow a method you have learned in person and that fits the tree and site. Do not improvise notch angles, cut depths, or hinge dimensions from a generic online rule. Keep the bar tip clear of the ground and other objects, maintain secure footing, and do not cut above shoulder height. If the tree does not behave as expected, stop rather than trying to correct the lay with rushed cuts.
A forward-leaning, large, or internally defective tree can barber-chair: the stem splits upward under pressure and may throw the butt or stem violently. That risk is not solved by simply changing the notch. Do not attempt routine felling on a tree that may barber-chair. A qualified professional can choose a control method suited to the tree.
When the tree commits to fall, use the planned escape route and move away from the stump area. Never stand beneath the crown or approach a hung tree. A tree caught in another tree can shift without warning. Do not cut it free or climb it; get qualified assistance.
When the safest direction is no direction
Sometimes the safest choice is not to fell the tree. This is the right call when the lay is uncertain, the tree has severe lean or major defects, a target sits in the fall zone, or the tree is hung. It is also the right call if the job requires working near energized lines or exceeds your training, equipment, or physical ability.
Field scenarios: applying the assessment
These examples show how the decision process works; they are not documented job reports or proof that a particular tree is safe.
- Open yard, slight lean: A landowner finds a small, apparently sound tree leaning toward a clear part of the yard. They still inspect the crown, check the far side of the trunk, confirm the whole fall area is clear, and set an exclusion zone. If any condition is uncertain, they stop.
- Clear lawn, hidden target: A tree appears to have room to fall, but a shed sits behind the crown and a fence is close to the trunk. The open lawn does not remove those hazards. The owner does not fell it and asks a qualified professional to assess options.
- Split trunk near a line: A tree has a visible split and stands near overhead conductors. This is not a DIY direction problem. The owner keeps people away and contacts qualified personnel.
Saw Maintenance, Chain Inspection, and Sharpening
A well-maintained saw reduces avoidable problems, but it does not make an unsuitable tree safe. Check the chain, bar, lubrication, and safety controls before each use. If the saw needs repair, has mismatched parts, or cuts poorly, stop and follow the manufacturer’s service guidance instead of forcing it through wood.
Start and warm the saw as its manual directs, on stable ground with the chain clear. Before cutting, confirm the intended lay, escape routes, and exclusion zone again. Check chain tension and sharpness, and inspect the bar and chain for damage. A dull chain can make cutting harder and increase fatigue; do not force it through a cut. Sharpen it to the chain maker’s instructions or have a qualified service shop do the work.
Use the manual’s procedure to check the automatic oiler. Keep the bar groove and oil holes clean as directed. Do not guess at chain settings, engine speed, or oil flow. If the chain moves at idle, the saw overheats, a safety control fails, or oil delivery is in doubt, stop and service the saw before use.
Shutdown, Transport, and Seasonal Storage
Safe work includes what happens after the cut. Apply the chain brake and shut down the saw before moving it, adjusting it, refueling, or clearing debris. Let hot parts cool before refueling or transport, and follow the manual for cleaning and storage. A tree that landed safely does not remove the need for a careful shutdown.
Keep the saw pointed away from your body when carrying it, with the engine off and the bar cover fitted. Secure the saw and fuel for transport as the manufacturer directs. After use, inspect for damage and clean the air filter, bar groove, and oil holes as specified. For storage, follow the manual’s steps for fuel, chain, and equipment care rather than using a one-size-fits-all routine.
If the job leaves a hung tree, a damaged saw, or an unstable trunk, keep people out of the area and arrange qualified help. Do not return to the tree to make extra cuts or retrieve equipment until the hazard has been assessed.
Conclusion: Choose the Lay Before You Cut
Felling direction is a judgment based on the tree, the weather, the terrain, and everything within reach. A clear path alone is not enough. If you cannot explain why the tree should fall in the planned direction and how people and property will stay clear, do not start. Get an on-site assessment from a qualified professional.
Frequently asked questions
How do I tell which way a tree will fall naturally?
Check the trunk’s lean, crown balance, defects, slope, and wind. These clues help estimate direction but cannot guarantee it.
Can a notch make a tree fall against its lean?
Not reliably. A notch can help guide a suitable tree, but it cannot safely overcome every lean, crown imbalance, or defect.
How far away should people stand?
Keep people outside a planned exclusion zone. Where practicable, at least two tree lengths is a conservative distance, but site conditions may call for more.
Can I fell a tree near power lines if I cut away from them?
No. Do not work near energized conductors without the required qualified personnel and clearance. Contact the utility or an appropriately qualified tree professional.
What is barber-chairing?
It is a sudden vertical split in a stem under pressure. It can propel the trunk or butt violently and is a reason to stop and use a qualified professional.
Can I fell a tree that is already hung up?
Do not try to cut it free, climb it, or pull it down yourself. A hung tree can shift without warning; keep people away and get qualified help.
Does a longer chainsaw bar make felling easier?
Not always. A longer bar can add load and leverage and increase kickback exposure. Use only a manufacturer-approved setup suited to the saw and task.
Is a 50:1 fuel mix right for every chainsaw?
No. It is common, but the correct fuel grade and oil ratio depend on the saw. Follow the model’s manual.
What if the tree’s fall direction is uncertain?
Do not cut. Keep people clear and ask a qualified arborist or felling professional to assess the tree and site.
Can I use a generic hinge size or raker setting?
No. Hinge choices depend on the tree and method, and raker settings depend on the chain. Follow appropriate training and the chain maker’s specifications.
(This article was written by one of our staff writers, Julian Barrett. Visit our Meet the Team page.)
