Arbor Age

Arbor Age March 2013

For more than 30 years, Arbor Age magazine has been covering new and innovative products, services, technology and research vital to tree care companies, municipal arborists and utility right-of-way maintenance companies

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them on at the base of the tree and remove them there when done climbing.After all, those small pointy things at the bottom are what keeps the user aloft and attached to the trunk. Rocks, gravel, and whatnot do not assist the pointy thing in doing its job.In addition,a misstep on the ground with spurs on can lead to neatly shaped holes in various body parts, ropes, saw gas tanks, and other items.The basic principles of climbers have not changed a great deal from their introduction in the 19th century, but new materials and options have made them a great deal more pleasant to use and wear.The majority of modern spurs have a great deal of adjustment available to better fit individual users. Crew members should take advantage of this, as a poorly adjusted or poorly fitted pair of gaffs can make almost any tree job feel like medieval torture. One of the most important adjustments is to the shank — the long metal or carbon fiber support that comes up the inside of the user's leg.The top of the shank should be adjusted so that it lays approximately two to three finger widths beneath the bony prominence on the inside of the knee.If the shank top is too high it will grind rather alarmingly against the bone; and if too low will dig with determination into the meat of the calf, neither is a pleasant experience when also wrestling with a saw and big wood. Users need to keep in mind that their full body weight is going to be supported on the stirrup that goes beneath their foot, or, in the case of some climbers, on a foot plate attached to the stirrup. Both options can cause some discomfort pretty quickly if poor footwear choices have been made.A stiff shank in the sole of the boot will go a long way toward spreading this force along the whole length of the foot; thus easing pressure.Although large www.arborage.com This climber's overhead tie-in allows him to make cuts on the ascent during the removal; and even move out on branches if needed. Photo by Thor Clausen Arbor Age / March 2013 13

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