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Safety, climbing, and working in trees


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Safety, climbing, and working in trees

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  2. 2. • Become Familiar with ISA methods of general tree work as well as safety techniques and recommendations.• Presented by Will Branch and Ryan Russell – University of Missouri 2
  3. 3. General SafetyClimbingTechniquesGeneral Methodsof Tree Work
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  5. 5. • Reading standards Approved- Means acceptable to the federal, state, provincial, or local enforcing authority having jurisdiction. Shall- Denotes a mandatory requirement. Should- Denotes an advisory recommendation.• Who writes standards and regulations? ANSI- American National Standards Institute OSHA- Occupational Safety and Health Act OHSA- Occupational Health and Safety Act CSA- Canadian Standards Association 5
  6. 6. • Head protection• Eye protection• Chainsaw pants or chaps• Boots• Gloves• Dressing appropriately 6
  7. 7. • Work plan and job briefing • discussing the work to be completed • assigning specific tasks • identifying jobsite hazards • using appropriate techniques and PPE to safely complete the job• Communication between climbers and ground workers / coworkers • command and response • hand signals 7
  8. 8. • Proper training in • Job site necessities • Required job tasks • First aid kit • Job site equipment • Fire extinguisher • Emergency response • Signs procedures • Barriers • Ariel rescue • Cones • First aid and CPR • Caution tape • High visibility clothing 8
  9. 9. • Electrical conductor is defined as any overhead or underground electrical device, including communication wires and cables, power lines, and related components and facilities.• Direct contact is made when any part of the body contacts an energized conductor or other energized electrical fixture or apparatus.• Indirect contact is made when any part of the body touches any conductive object in contact with an energized conductor. 9
  10. 10. • Required PPE• Operation of chainsaw• Reactive forces• Climbing with chainsaw 10
  11. 11. • Investigation of tree and surroundings• Retreat path (escape route)• Felling notches• Use of wedges and pull ropes 11
  12. 12. • Operators must be properly trained in the inspection, maintenance, towing and operation of their chipper.• Required PPE, Approved hardhat, safety glasses, and hearing protection.• Loose clothing, jewelry, harnesses, and gauntlet style gloves must not be worn.• Brush should be fed butt first from the side of the chute.• No part of the operators body should ever reach past the back edge of the feed chute. 12
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  14. 14. • All PPE must be • Requirements of approved for use in tree climbing gear. care. • Rope snaps must be auto• All PPE, climbing gear, locking and compatible with a D-ring attachment. rigging gear, tools, etc. should be checked for • Carabiners must be double auto locking and damage or excessive have a m.b.s. of 5,000 wear regularly. pounds(23kN)• All climbing gear must • Climbing lines must be meet minimum strength made from a synthetic requirements and be fiber, have a m.b.s. of 5400 pounds(24kN) and approved for use in tree must not elongate more care. than 7 percent under a load of 540 pounds. 14
  15. 15. • The working end is the end • Common climbing and of the line that is in use. rigging knots• The running end is the end • Tautline Hitch of the line that is not in use. • Blake’s Hitch• The standing part is the line • Figure-8 between the working end • Girth Hitch and the running end. • Bowline/ Running Bowline• A hitch is used to secure a • Midline Clove Hitch/ Endline rope to an object. • Slip Knot• A bend is used to secure • Sheet Bend rope to rope. • Double Fishermans Bend• A friction hitch is designed to • Prusik Hitch be easily moved along a line • Cow Hitch but tighten down under a • Timber Hitch load. • Half Hitch and Running Bowline 15
  16. 16. • Things to look for • Electrical hazards • Broken, week, or dead branches • Animals or insects • Fruiting bodies The following are defects or signs of possible defects in urban trees (see figure): above. • Root flair 1. regrowth from topping, line clearance, or other pruning 2. electrical line adjacent to tree 3. broken or partially attached branch 4. open cavity in trunk or branch 5. dead or dying branches 6. branches arising from a single point on the trunk 7. decay and rot present in old wounds 8. recent change in grade or soil level, or other construction 16
  17. 17. • Accessing the tree • Setting a line using a throwline • Climbing with spurs • Body thrusting • Secured footlocking • Use of micro pulley and prusik hitch • S.R.T. 17
  18. 18. • Choosing a tie in point • Choosing a climbing • Select a union that is system wide enough for a rope • Closed system to pass through easily. (anchoring knot and • Generally the main hitch tied with rope tail) branch should be at • Open system (using least 4 inches in carabiners, split tail and diameter. tending pulley) • Use of a friction saving device is recommended. 18
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  20. 20. • Assessing the situation• Calling for help• Electrical accidents• Reaching the victim• Checking the victim• Rescue kits• Access line 20
  21. 21. • Different rope types and designs • 3 strand • 12- strand solid • 12- strand hollow • 16- strand • 24- strand • Kernmantle 21
  22. 22. • Tensile strength• Cycles to failure• Working load limit (WLL)• Design factor 22
  23. 23. • Arborist blocks• Rescue pulleys• Rope and webbing slings• Lowering devices• Connecting links 23
  24. 24. • Attachment knots • Clove Hitch • Running Bowline• Piece orientation • Butt tying • Tip tying • Balancing • Butt hitching• Cutting the piece • Drop cut • Snap cut • Hinging cut 24
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