Chainsaw Tree Work

# Localization note -- chainsaw safety principles are universal. Regulations and standards vary.
# Agent must follow these rules when working with non-US users:
- PPE requirements, felling techniques, and safety protocols are universal -- apply everywhere.
- Substitute US-specific references with local equivalents:
  US: OSHA chainsaw safety standards
  UK: HSE (Health and Safety Executive) forestry guidelines
  Australia: Safe Work Australia forestry code of practice
  Canada: Canadian Centre for Occupational Health and Safety (CCOHS)
  EU: EN ISO 11681 chainsaw safety standards
- Professional certification programs vary by country:
  US: Game of Logging, TCIA
  UK: NPTC chainsaw certificates (CS30, CS31, etc.)
  Australia: Certificate II in Forest Growing and Management
  Canada: BC Forest Safety Council, provincial equivalents
- Tree felling permits and protected species laws vary by jurisdiction.
  Agent must advise user to check local council/municipality rules before felling.
- Emergency services number: US 911, UK 999, AU 000, EU 112.

CALL A PROFESSIONAL IF ANY OF THESE ARE TRUE:

-> Tree is within two tree-lengths of a power line
-> Tree requires climbing to access (NEVER climb with a chainsaw without
   professional training and equipment)
-> Tree is leaning toward a building, fence, or structure
-> Tree is hung up in another tree ("widow maker" -- extremely dangerous)
-> Tree is dead and has been standing for a long time (unpredictable
   structural integrity, branches fall without warning)
-> Tree diameter is over 18 inches and you have fewer than 10 felling cuts
   of experience
-> You are not sure about the lean direction
-> The tree has multiple trunks or major forks
-> You would need to fell the tree uphill
-> Any situation where you feel uncertain -- that feeling is correct

HOW TO FIND A PRO:
-> Search "ISA certified arborist" + your area
-> Verify credentials at treesaregood.org/findanarborist
-> Get 2-3 quotes. Expect $200-2000+ depending on size and complexity.
-> Confirm they carry liability insurance and workers' comp.

REQUIRED PPE (all of it, every time):

CHAINSAW CHAPS OR PANTS -- $40-80
-> Layers of cut-resistant fiber that jam the chain on contact
-> The single most important piece of chainsaw PPE
-> Must cover front of legs from waist to boot top
-> Replace after any contact with a running chain (they're single-use
   in the impact zone)

HELMET WITH FACE SCREEN AND EAR PROTECTION -- $30-50
-> Combination unit: hard hat + mesh face screen + ear muffs
-> Stihl, Husqvarna, and Oregon all make good combo units
-> Face screen stops wood chips and debris at chain speed
-> Ear protection prevents hearing damage (chainsaws run 100-115 dB)

STEEL-TOE BOOTS -- $60-150
-> Logging boots with steel toe and cut-resistant uppers ideal
-> At minimum: steel-toe work boots with ankle support
-> No sneakers, sandals, or regular shoes. Ever.

GLOVES -- $15-30
-> Cut-resistant gloves with grip
-> Not bulky winter gloves (you need to feel the controls)
-> Left hand is the most common injury site

FITTED CLOTHING
-> Nothing loose: no scarves, no hoodie strings, no baggy sleeves
-> Long pants (under chaps), long sleeves
-> Clothing should not be so tight it restricts movement

EYE PROTECTION (if no face screen)
-> Safety glasses or goggles as backup

CHAINSAW SELECTION:

BAR LENGTH:
-> 16" bar -- right for most homeowners. Handles trees up to 12" diameter
   (you can cut from both sides for up to 24" trees with experience)
-> 18-20" -- for regular firewood cutting and medium trees
-> 14" or smaller -- limbing, light cleanup
-> Rule: don't buy bigger than you need. Longer bar = heavier = more
   kickback force = more fatigue = more danger

ENGINE TYPE:
-> Electric (corded or battery) -- for occasional limbing, small cleanup,
   branches under 6". Less kickback, lighter, quieter. Good starter saw.
-> Gas -- for felling, regular firewood, storm cleanup. More power,
   no cord limit, runs longer. Requires fuel mixing (2-stroke) or
   straight gas (4-stroke, less common).

CHAIN TYPES:
-> Low-kickback chain -- comes standard on consumer saws. Slower cut but
   significantly safer. USE THIS until you have real experience.
-> Full-chisel chain -- cuts faster, kicks back harder. Professional use.
-> Semi-chisel -- good middle ground for dirty wood and firewood.

MAINTENANCE (do these or the saw becomes dangerous):

CHAIN TENSION -- check before every use
-> Lift chain at mid-bar: should pull up slightly and snap back
-> Too loose: chain can derail and whip off the bar
-> Too tight: overheats, wears prematurely, can break

CHAIN SHARPENING -- every tank of fuel, or when you see sawdust instead
of chips
-> Round file matched to chain gauge (stamped on chain or in manual)
-> Follow factory angle (usually 25-35 degrees)
-> Same number of strokes on each cutter
-> File from inside to outside
-> A dull chain makes you push harder, which causes fatigue and accidents

BAR OIL -- refill every time you refuel
-> The chain needs constant lubrication
-> Running dry destroys the bar and chain in minutes

FUEL (gas saws)
-> 2-stroke: premixed fuel ($8/can) or mix yourself (50:1 ratio typically)
-> NEVER put straight gas in a 2-stroke engine -- destroys it in minutes
-> Use fuel stabilizer or drain tank for storage over 30 days

THE 5-STEP FELLING PLAN:

STEP 1: ASSESS THE LEAN
-> Stand back and look at the tree from two directions 90 degrees apart
-> Natural lean determines the easiest felling direction
-> Check for dead branches overhead ("widow makers")
-> Check wind direction and speed -- don't fell in strong wind
-> Look for obstacles in the fall zone (other trees, structures, vehicles)
-> Felling with the lean is safest. Against the lean requires wedges
   and experience.

STEP 2: CLEAR YOUR ESCAPE ROUTES
-> Two routes: 45 degrees behind the tree, on both sides of the fall
-> Clear brush, branches, and tripping hazards along both routes
-> You WILL use one of these routes. Make sure you can move fast.
-> Never stand directly behind the falling tree (butt can kick back)
-> Never stand in the fall zone

STEP 3: THE NOTCH CUT (face cut, on the side facing the fall direction)
-> Conventional notch: horizontal cut 1/3 into trunk, then angled
   cut from above to meet it (creates a 45-degree wedge)
-> Open-face notch: two angled cuts meeting at 70+ degrees (preferred
   by professionals -- tree falls more predictably)
-> Notch depth: about 1/4 to 1/3 of trunk diameter
-> The notch determines fall direction. Get this right.

STEP 4: THE BACK CUT (opposite side from the notch)
-> Start the back cut 1-2 inches ABOVE the floor of the notch
-> Cut toward the notch but STOP before cutting through
-> Leave a hinge of uncut wood (about 10% of trunk diameter)
-> The hinge controls the fall direction -- cutting through it
   means the tree can fall anywhere
-> If the tree starts to pinch your bar, insert a felling wedge
   (plastic, never metal -- metal + chain = disaster)

STEP 5: RETREAT
-> When the tree begins to move, REMOVE THE SAW
-> Walk (don't run) along your escape route
-> Watch the tree as you move -- the butt can jump or roll
-> Keep watching even after it lands -- branches can snap and fly
-> Wait until everything stops moving before approaching

LIMBING (removing branches from the trunk):

-> Work from the butt end toward the top
-> Stand on the uphill side whenever possible
-> Keep the trunk between you and the saw when practical
-> Watch for REACTIVE FORCES: branches under tension from the tree's
   weight will spring when cut. Identify which direction the force
   will release before cutting.
-> Cut branches close to the trunk in a single motion
-> Small branches: one cut from the top
-> Large branches under tension: undercut first to prevent bark tear,
   then top cut

BUCKING (cutting the trunk into logs):

-> Assess the log's support points before cutting
   - Supported at both ends: cut from top down (compression on top)
     but stop at 1/3 depth, roll log, finish from the other side
   - Supported at one end: cut from bottom up (tension on bottom)
     to prevent pinching the bar
-> Never cut with the tip of the bar in contact with wood (kickback zone)
-> If the log is on the ground: cut from the top, stop before you hit
   dirt (dulls the chain instantly). Roll and finish from the other side.
-> Standard firewood length: 16 inches (fits most wood stoves and
   fireplaces). Measure and mark before cutting.

KICKBACK -- THE SINGLE MOST DANGEROUS THING:
-> The upper quadrant of the bar tip is the KICKBACK ZONE
-> If this part contacts wood, the bar kicks up and back toward you
   faster than you can react
-> NEVER let the tip contact anything
-> NEVER start a cut with the tip
-> NEVER cut above shoulder height
-> Keep a firm grip with both hands -- left hand wrapping the front
   handle with thumb underneath
-> Chain brake: your left wrist hits it if the saw kicks back.
   Test it before every use.

STORM CLEANUP -- ADDITIONAL HAZARDS:

-> Downed power lines: ASSUME ALL WIRES ARE LIVE. Stay 35+ feet away.
   Call your utility company. Do not touch anything touching the wire.
   Do not touch anything touching something touching the wire. Electricity
   can travel through wet ground.
-> Trees on structures: do NOT try to remove them yourself. The tree
   may be the only thing holding the structure together. Call a pro.
-> Trees under tension: storm-damaged trees are loaded with stored
   energy. Branches and trunks can snap unpredictably. Work slowly,
   assess tension direction before every cut.
-> Spring-poles: bent saplings or branches pinned under debris.
   Extremely dangerous -- they release like a catapult when freed.
   Cut from the side, never stand in the release path.
-> Flooded ground: unstable footing makes chainsaw work more dangerous.
   Wait for ground to dry if possible.
-> Fatigue: storm cleanup often involves long days. Tired people make
   mistakes. Quit while you can still focus.

DIAMETER LIMITS FOR BEGINNERS:
-> Nothing over 12" diameter until you have at least 5 supervised
   felling cuts
-> Nothing over 18" diameter until you have significant experience
-> Nothing that requires more than your bar length without cutting
   from both sides