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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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