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A wire saw being used to remove concrete pad flush with surrounding - wire cutting at bottom-right corner of pad. A wire saw is a saw that uses a metal wire or cable for mechanical cutting of bulk solid material such as stone, wood, glass, ferrites, concrete, metals, crystals etc.. [1]
An arborist using a chainsaw to cut a eucalyptus tree in a public park Two arborists climbing and dismantling a Norway Maple in Ontario, Canada. An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants in dendrology and horticulture.
The remaining part of the tree's diameter is for the back cut, which weakens the tree structurally enough for it to fall without splintering and other unwanted effects. There are three types of directional felling notches that are most commonly used in the logging and arboriculture industries by chainsaw operators.
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The doubled-rope technique (DRT or DdRT) is used to self belay the climber in such a way that the rope can be retrieved without going back up the tree. One end of the rope is fastened to the climber's saddle (harness), from there the rope passes around the tree and back to a friction hitch, which is also attached to the climber. This system ...
Dynamic ropes manufactured for climbing are tested by the UIAA. A test of "single" standard rope involves tying an 80 kg (176 pound) weight to the end of a length of rope. This weight is then dropped 5 meters (16½ feet) on 2.7 meters (9 feet) of rope, with the rope running over a rounded surface simulating that of a standard carabiner. This ...
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