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									Chainsaw Safety




  Safety Presentation
      Kyle Crisp
          Introduction to Chainsaws

                                            •Chainsaws are very efficient
                                            and useful tools, used mostly to
                                            fell trees

                                            •In construction, they would
                                            primarily be used in the site
                                            clearing phase




Source: http://forestry.about.com/cs/chainsaws/a/carl_smith_saw1.htm
              Introduction Continued
                                            • Chainsaws can also be
                                              extremely dangerous if
                                              used improperly

                                            • One logger called them the
                                              “most dangerous hand tool
                                              that can be purchased on
                                              the open market”

                                            • No training is required to
                                              operate or purchase a
                                              chainsaw

Source: http://forestry.about.com/cs/chainsaws/a/carl_smith_saw1.htm
                    Facts and Figures
• 40,000 chainsaw injuries a year
• Average injury requires 110
  stitches
• 4 weeks recovery is typically
  required
• Most of these injuries are
  preventable
• Most injuries are caused by
  kickback or falling
  trees/objects

                      Source: http://www.elvex.com/facts08.htm
              Parts of a Chainsaw




Compliments of: http://www.mower-magic.co.uk/hse_chainsaw2.gif
                                       Figures Continued


• 36% of Chainsaw Injuries
are to the legs and knees

•Based on 1989 figures:
       -Average direct costs
        were $5600
       -Indirect costs were
       at least $12,000




           Source: http://www.osha.gov/SLTC/etools/logging/manual/logger/chain_saw/chain_saw.html
                       Avoiding Injuries


•Always check the air filter, spark
plug, and muffler for defects
before starting
•Always read the manual before
use
•Make sure the carburetor is
properly adjusted to avoid stalling
and poor performance




              Source: http://www.redcross.org/pubs/dspubs/chainsaw.pdf
                          Avoidance Continued
  •Always ensure the engine is cool when refueling

  •Never use dull blades and check the chain tension

  •Never use a chainsaw from a ladder or a tree




Source: http://www.nzlifestyleblock.co.nz/Countrylife/Countrylifearticle/tabid/203/ArticleID/403/Default.aspx
                       Choosing the Right Chainsaw

• Lightweight Chainsaws
    -used for light-duty jobs such as
    cutting branches and trees less than 8
    inches
    -8”-12” guide bar

•Midweight Chainsaws
        -used for cutting logs
        and trees less than 18”
        -14-20” guide bar
•Heavyweight Chainsaws
        -20” and greater guide bar
        -used in professional
        applications




                Thanks to: https://muconf.missouri.edu/explore/agguides/agengin/g01959.htm
Steps to Cutting Down a Tree



                                  •A significant portion of chainsaw
                                  injuries are caused by falling trees not
                                  by the blade

                                  •Which way will the tree fall?
                                         -Weight
                                         -Which way it is leaning
                                         -Wind




Source: http://www.ag.ndsu.edu/pubs/ageng/safety/ae1025w.htm
   Felling a Tree Continued
                             •Consider objects such as power
                             lines that may be in the way of the
                             fall
                             •Make sure the tree will fall
                             completely. Hanging trees are very
                             dangerous.
                             •Influence the direction of the fall
                             as shown in the diagram to the right
                             •If possible, always work in pairs
                             so someone is there to assist you
                             and strategize the fall


Source: http://www.ag.ndsu.edu/pubs/ageng/safety/ae1025w.htm
                           OSHA Chainsaw Regulations

               1910.266(e)(1)- Before starting the saw
  •     Ensure that all parts of the saw are in good
        working condition
  •     Refuel the saw at least 10’ from sources of
        ignition
  •     Start the saw on the ground, with chain break
        engaged
  •     Only use an approved fuel container as specified
        by 1910.266(d)(9)

Source: http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9862
                                 OSHA Regulations Continued

              1910.266(e)(2)- Running the Chainsaw
     •    Keep both hands on the handles at all times
     •    Always maintain secure footing
     •    Keep the surrounding area and escape path clear
          of debris
     •    Never cut overhead
     •    Shut off or engage chain break if walking more
          than 50’ or if walking on unlevel ground

     •OSHA 1926 doesn’t directly cover chainsaw safety in any depth

Source: http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9862
            Chainsaw Personal Protective Equipment

Always equip yourself with the
following:
        -Hardhat
        -Gloves
        -Goggles
        -Boots
        -Hearing Protection
        -Chainsaw chaps
        -Close-fitting clothing
        -Face protection




                  Thanks to: https://muconf.missouri.edu/explore/agguides/agengin/g01959.htm
             Chainsaw Chaps
• One of the newer PPE
  developments
• Capable of stopping a blade
  rotating at 2500 fpm (as
  dictated by ASTM F-1897
• These can eliminate the
  severity of many injuries to
  the legs- where most damage
  occurs
• Stops the blade by jamming it
  with fibers between the bar
  and sprocket
• Typically made of nylon and
  Kevlar
               Thanks to: http://www.elvex.com/chainsaw-chaps.htm
                                Recap
•Chainsaws can be very dangerous. They
cause 40,000 injuries a year.

•Always wear full PPE

•Plan how you will cut and
•what will happen after the cut
•Maintain your equipment for better
performance, efficiency, and safety

•Always consider safety and use common
sense!

								
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