Dutchman Notch Hazards (Felling Safety Specs)
A Dutchman is a felling-notch defect where the face cuts do not meet as planned, or overlap in a way that alters the notch and hinge. It can trap the bar, weaken directional control, or trigger a sudden split. Stop cutting, withdraw safely, keep others clear, and have a qualified faller reassess; do not improvise a correction cut.
A tree that looks manageable from the ground can behave very differently once its fibers are cut. Lean, decay, crown weight, wind, and hidden tension all affect how the trunk moves. A notch defect adds uncertainty at the point where the fall should be controlled.
I treat an unexpected cut as a reason to pause, not as a puzzle to solve with more saw work. In the field, the dangerous choice is often continuing because the tree seems almost ready to fall. If the notch, hinge, or tree movement is no longer predictable, step away and get a qualified faller to assess it.
What a Dutchman defect is and why it is hazardous
A Dutchman is a mismatch or overlap between the cuts that form a tree’s face notch. It can leave wood where the cuts should meet, remove wood that should remain, or create an uneven opening. The result may affect the hinge, trap the guide bar, or change the tree’s fall.
The face notch is the opening cut on the side toward the intended fall. The hinge is the strip of uncut wood between the notch and the back cut. It helps guide the tree as it starts to fall. A defect in the notch can make the hinge uneven or reduce its ability to control movement.
The specific effect depends on the tree and the cuts. A small-looking mismatch is not proof that the hinge is sound. Species, trunk shape, lean, decay, and internal stress all matter. There is no single notch angle or hinge thickness that is safe for every tree.
Common signs of a notch mismatch
A cut that does not meet as planned may show a visible step, a wedge of wood left between the cuts, or one cut extending past the other. The saw may also bind as the notch closes or as the stem shifts. These signs do not tell you exactly how the tree will move.
If you see a mismatch, do not use the saw to “clean up” the notch while standing in the fall zone. I have seen a small difference between cuts tempt operators to make one more pass. That pass can remove hinge wood or release pressure that was holding the stem in place.
Equipment setup and felling-site safety
A safe setup starts before the saw reaches the tree. The operator must be trained for the tree’s size and condition, wear suitable chainsaw PPE, and check the saw and work area. If the tree’s lean, decay, overhead hazards, or surroundings exceed the operator’s skill or equipment, do not fell it yourself.
Inspect the tree for lean, dead or hanging limbs, trunk damage, signs of decay, and nearby targets such as buildings, roads, or power lines. Check wind and crown weight, too. If overhead utilities could be affected, contact the utility owner and follow local requirements; do not work near energized lines.
Clear people from the work zone. OSHA’s logging rule, 29 CFR 1910.266, includes felling safety requirements for covered operations. Its escape-path guidance calls for a clear route away from the expected fall, roughly 45 degrees from the direction opposite the intended fall. Follow applicable rules, the current ANSI Z133 standard for arboricultural work, employer procedures, and your training.
Before starting, identify two clear escape options where practical. Remove brush and trip hazards from the routes. Wear task-appropriate PPE, including head, eye, hearing, leg, hand, and foot protection suited to the work. Keep bystanders out of the danger area.
| Check before cutting | What to assess | Stop and get qualified help if… |
|---|---|---|
| Tree and crown | Lean, dead limbs, decay, crown weight | The tree is unstable, damaged, or hard to predict |
| Drop zone | Buildings, people, roads, utilities | The fall could reach a target or utility |
| Escape routes | Clear paths away from the fall | You cannot leave quickly without obstacles |
| Saw condition | Brake, controls, chain, bar, tension | A safety device fails or the setup is not approved |
A chainsaw’s bar, chain pitch, gauge, and drive-link count must match combinations approved by its manufacturer. Fuel mix, bar oil, idle speed, maximum speed, and fastener torque are also model-specific. Do not rely on a generic ratio, adjustment, or bar-length rule.
Face notch, hinge, and field cutting procedure
The notch and hinge must follow the selected felling method and the tree’s actual conditions. There is no universal cut angle, notch depth, or hinge thickness that applies to every tree. Plan the cuts before starting, and keep the hinge intact as the tree begins to move.
Use a method you are trained to perform. Make the planned face cuts without crossing or extending them by guesswork. The back cut should leave the intended hinge; it is not a tool for correcting a notch that no longer matches. Do not continue if the tree’s movement differs from what you expected.
What to do if you find a Dutchman
If the face cuts overlap, fail to meet correctly, or leave the hinge uncertain, stop the saw. Do not blindly extend the face cut or back cut. Either move can sever needed hinge wood, trap the bar, or release stored stress without warning.
- Keep the saw under control and follow the manufacturer’s shutdown procedure if you can do so safely.
- Withdraw along a clear escape path, away from the expected fall.
- Keep other people well clear. Do not approach the trunk to inspect the defect.
- Have a qualified faller assess the tree and choose a safe next step.
A compromised hinge can contribute to a barber-chair split, where the trunk splits upward and may move violently toward the faller. Heavy forward lean, hidden decay, and unusual loading raise concern. If any are present with a defective notch, treat the situation as high severity.
Chainsaw inspection, sharpening, and manufacturer-specified tuning
A sharp, correctly fitted chain helps the saw cut as intended, but it cannot make a defective notch safe. Inspect the chain, bar, controls, chain brake, throttle lockout, and chain catcher before work. Use the exact operator’s manual for chain fit, tension, fuel, oil, starting, and service instructions.
Start the saw using the maker’s cold- or warm-start method. Secure it as directed and engage the chain brake when the manual calls for it. Confirm stable idle and proper brake function before approaching the cut. If the saw needs tuning or a safety part is damaged, stop and service it as specified.
There are no universal RPM, torque, or oil-flow settings for felling. For example, a 50:1 fuel ratio or a 3/8-inch low-profile chain with .050-inch gauge is correct only if the saw and cutting equipment manufacturer specifies that combination. Never tune by guesswork or force an unapproved bar and chain onto a saw.
Field scenarios: when to stop rather than correct
These examples are common decision situations, not reports of a specific job. They show why the right response depends on the tree’s movement and surroundings, not just the visible cut. When the hinge or fall path is uncertain, the safe next step is to withdraw and get an expert assessment.
| Situation | Main concern | Safer response |
|---|---|---|
| Cuts leave a step or wood between them | Uneven notch and uncertain hinge | Stop, withdraw, and have a qualified faller reassess |
| Saw becomes trapped as the stem shifts | Tree movement may be changing under load | Do not force or twist the saw; retreat if safe |
| Tree has heavy forward lean or trunk decay | Sudden movement or stem split | Do not continue; use a qualified faller and an alternate plan |
| Utility line is within the possible fall area | Severe risk of electrical contact | Stop and contact the utility owner or qualified tree professionals |
A common mistake is to focus on freeing the bar while standing near the tree. The bar is replaceable; an unpredictable stem is not something to approach casually. Do not cut into a hung or unstable tree unless you are trained and equipped for that specific hazard.
Shutdown, cleaning, and seasonal storage
After work, move to a safe location and shut the saw off before inspection, adjustment, or cleaning. Let it cool before handling hot parts. Check for damage, loose components, or a chain that has shifted, then clean and store the saw as its manual directs.
If a Dutchman occurred, do not return to the tree later and resume cutting based only on how it looks. Keep the area closed off until a qualified faller has assessed the tree and the plan. Record any saw damage or service needs, and do not put faulty equipment back into use.
Frequently asked questions
These answers focus on recognizing a notch defect and choosing a safe response. Tree felling depends on conditions at the site, so short rules cannot replace training or an assessment by a qualified faller. When in doubt, stop work and keep people clear.
Can I fix a Dutchman by making another notch cut?
No. Extending a face cut without assessing the tree can remove hinge wood, trap the bar, or release stored stress. Stop, withdraw by a clear escape route, and have a qualified faller decide what to do next.
Is a Dutchman the same as a barber chair?
No. A Dutchman is a defect in the face notch. A barber chair is a dangerous upward split of the trunk. A notch or hinge problem can increase the chance of an uncontrolled split, especially when the stem is under heavy stress.
How thick should the hinge be?
There is no safe universal hinge thickness. The right size depends on the tree, species, diameter, lean, condition, and felling method. Use a trained faller’s assessment and the chosen method’s requirements; do not copy a measurement from another tree.
How wide should the face notch be?
No single notch angle or width suits every tree and condition. Follow the felling method you are trained to use and assess the tree’s lean, defects, and surroundings. If the cuts do not meet as planned, stop rather than reshape the notch by guesswork.
What if the chainsaw bar is pinched in the cut?
Do not yank, twist, or cut blindly to free it. If you can shut the saw down safely, do so, then withdraw and keep others clear. A shifting stem can trap the saw and move suddenly; get a qualified faller to assess the situation.
Can a small tree still barber-chair?
Yes. Tree size alone does not rule out a trunk split or sudden movement. Lean, internal defects, and stress affect how a stem behaves. If the tree is loaded or damaged and the hinge is uncertain, leave it to a qualified faller.
Is a 45-degree escape route a universal rule?
It is a useful OSHA logging escape-path guideline for covered work, not a substitute for site judgment or other applicable rules. Clear a route away from the expected fall, follow your training and procedures, and do not work if no safe retreat is available.
When should I hire a professional?
Hire a qualified tree professional when the tree has heavy lean, decay, hanging limbs, nearby utilities or targets, an uncertain hinge, or a notch defect. Also get help when the tree’s size or conditions exceed your training or equipment. Keep people away until it is assessed.
The key rule is simple: a notch defect turns a planned cut into an uncertain tree. Stop, retreat, and get a qualified assessment rather than trying to repair it with more cutting.
(This article was written by one of our staff writers, Julian Barrett. Visit our Meet the Team page.)
