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Traffic Control <br />Topography, volume <br />Tailgate Session 3; <br />Hard hat, safety <br />and speed of traffic, <br />time of day, weather <br />ANSI Z133.1 4.4 <br />glasses, reflective <br />vest, flag or signs <br />conditions <br />Trailer Towing & <br />Hitch failure, jack <br />Tailgate Session #38 <br />Hard hat, safety <br />Setup <br />failures, vehicular <br />glasses, traffic cones <br />traffic <br />and signs, gloves <br />Tree Take -Down <br />Barber chairs, <br />Tailgate Session <br />Hard hat, safety <br />conductors, cuts, <br />struck-bys <br />#36; ANSI Z133.1 5, <br />9.5 <br />glasses, hearing <br />protection, gloves, <br />chainsaw chaps <br />NOTE: the hazards in bold represent Musculo -skeletal disorder (MSD) risk factors that should be minimized (duration, <br />frequency and/or magnitude) to the extent possible or eliminated. MSD signs are decreased range of motion, deformity, <br />decreased grip strength and loss of function. MSD symptoms are numbness, burning, pain, tingling, cramping and stiffness. <br />Other hazards that apply to some/all of the above tasks: Drug Use and/or Alcohol Abuse; Fatigue; Fire; Lyme Disease; <br />Poisonous Plants; Violent Workers/Customers; Weather, <br />Back Injury Prevention: <br />Causes of Back Injury <br />Pulling, twisting, and slipping are the most common causes of back injuries. Lifting objects improperly can also hurt the <br />back. Lifting with the back and not the legs, lifting from an awkward position, or tying to move material too large for one <br />person can lead to injury. <br />Even simple movements can cause back injury. Stepping from a truck, bending over for a small tool, or over -reaching can <br />strain back muscles. <br />Table 1 below ranks the most fr <br />equent causes of back injury in tree care in descending order. <br />Table 1 -How Back Injuries Happen <br />Lifting... <br />Large objects <br />Irregularly shaped objects <br />Page 66 of 87 <br />