Chainsaw safety and PPE, piece by piece

There is no single federal "tree care standard". OSHA's own tree-care page says the industry must comply with all of the general industry standards in 29 CFR 1910. In practice that means three layers stacked on each other:

• 1910.132

  The employer assesses the hazards, certifies that assessment in writing, picks the PPE to match and trains people to use it.

• 1910.133 · 135 · 136 · 95

  The specific rules for eyes and face, heads, feet and hearing.

• 1910.266

  The logging rule. It is written for logging, not for a crew in a back garden, but it is the most specific chainsaw text OSHA has, and tree companies borrow it as the reference.

• ANSI Z133-2026

  The industry's own safety standard for arboricultural operations, published through ISA. Read it for the tree-work specifics.

For a company, this is not paperwork for its own sake. The written hazard assessment is the first thing an inspector asks for after an injury, and it sits behind the safety questions an insurer asks too; the insurance guide covers the workers' compensation line that a lost-time saw injury lands on.

The table reads left to right: what goes wrong, what stops it, and where the requirement is written. Where a paragraph comes from the logging rule, it is the clause tree crews borrow, not one that binds a residential job by its own terms.

OSHA's logging eTool has a body map of chainsaw injuries with one line under it: most injuries occur on the lower left leg and the left arm. The reason is mechanical. A right-handed operator holds the front handle with the left hand and stands with the left leg forward, so when the bar kicks back or follows through a cut, those are the parts in its path.

Leg protection works by pulling long fibres into the drive sprocket and jamming the chain. The logging rule asks for cover over the full length of the thigh to the top of the boot on each leg, made of cut-resistant material. ASTM F1897 is the US specification for that leg protection. It has one written exception: a climber in the tree, where the employer shows the chaps create a greater hazard, and someone working from an aerial lift. Many climbers wear cut-resistant chainsaw trousers in place of chaps for that reason.

Kickback is the bar tip catching wood and throwing the saw up and back toward the operator, faster than anyone can react. Three things in the logging rule are aimed at it: a chain brake on every saw placed into service after the rule took effect (and a kickback device on older ones), a rule that no kickback device is ever removed or disabled, and a continuous-pressure throttle that stops the chain when you let go. OSHA's QuickCard puts the operator's half in five words: do not saw with the tip.

• Fuel

  At least 10 ft from any open flame or ignition source. Never fuel a running or hot saw.

• Start

  At least 10 ft from where you fuelled, on the ground or firmly supported, chain brake engaged. Drop starting is prohibited.

• Hold

  Thumbs and fingers of both hands wrapped round the handles, with sure footing before the cut.

• Carry

  Chain brake on or engine off for any carry over 50 ft, and over shorter distances on rough ground.

Each of those lines comes from 1910.266(e)(2). The QuickCard adds the daily checks: controls, chain tension, bolts and handles, a sharp chain and a full oil tank. A blunt chain is a safety problem, not just a slow one, because an operator forcing a dull saw is the one whose bar ends up where it should not be.

The rule that keeps the most people alive is spacing. The logging rule keeps adjacent work areas at least two tree lengths apart, and when a spring pole or other stressed stem is cut, nobody but the feller is closer than two tree lengths. Before the first cut the feller plans and clears a retreat path running diagonally away from the felling line, and moves along it as soon as the back cut is made.

OSHA's tree-care fact card for residential work puts the same idea into a homeowner's street: secure a coned drop zone at least twice the tree's height and keep work at least 10 ft from power lines, or have the utility de-energise them. If you cannot fit that circle on the property, the tree is not a felling job; it is a sectional removal, priced in crane vs climbing removal.

None of the OSHA rules bind a homeowner on their own land, but the injuries do not know that. The honest version for a weekend saw:

1. Wear chaps or chainsaw trousers, boots, eye and ear protection every time, even for one cut.
2. Never work alone, and never above shoulder height or off a ladder.
3. Do not cut anything bent under tension after a storm. The storm walk-round explains why spring poles are a crew job.
4. If there is a target under the tree, score it first on the risk assessment form.
5. Stay inside your skill level. Bucking a log on the ground is a different job from felling.

Where the line between a homeowner job and a crew job falls is set out in DIY vs professional tree removal, and if the brush is already down, the cheaper half of the work is usually a rental, compared in chipper rental vs hiring a crew. If the saw is becoming a career rather than a weekend, the route from groundie to climber is in how to become an arborist, and the company-level safety credential is compared in TCIA accredited vs ISA certified.