Orange County NC Website
Browse       Search
DocuSign Envelope ID:5FA4B1AC-B897-4C32-A1E4-4B4A8885A341 <br /> ERDINDER C rowde rG u llf <br /> XLILF RFP for Disaster DebrisCiearance and Removal Services <br /> Orange County, NC <br /> RECOMMENDED SAFE PRACTICES FOR TREE MAINTENANCE AND REMOVAL OPERATIONS <br /> TREE CLIMBING <br /> • The climber should not trust the capability of a dead branch to support his/her weight. If possible, dead <br /> branches should be broken off on the way up and hands and feet should be placed on separate limbs. <br /> • A worker should never shin a tree fora distance greater than 15 ft(4.6 m)or shin for any distance beyond <br /> his/her demonstrated physical abilities. When the climbing distance is greater than 25 ft (7.6 m) or is <br /> beyond the worker's physical capability, the worker should not climb or footlock the rope but should use <br /> a safety saddle or sling. <br /> ■ The climbing rope should be passed around the trunk of the tree as high above the ground as possible <br /> using branches with a wide crotch to prevent any binding of the safety rope. <br /> Exception; Palms and other trees with similar growth characteristics that will not allow a climbing rope to move <br /> freely. The crotch selected for tying should be directly above the work area, or as close to such a position as <br /> possible, but located in such a way that a slip or fall would swing the worker away from any electrical conductor. <br /> The rope should be passed around the main leader or an upright branch, using the limb as a stop. Feet, hands, <br /> and ropes should be kept out of tight V-shaped crotches. <br /> • While climbing, the location of all electrical conductors should be noted and the worker should climb on <br /> the side of the tree that is away from electrical conductors, if possible, <br /> ■ A figure-eight knot should be tied in the end of the rope, particularly when climbing high trees,to prevent <br /> pulling the rope accidentally through the taut-line hitch and possibly failing. <br /> PRUNING AND TRIMMING <br /> A scabbard should be hooked to the belt or safety saddle to carry a handsaw when not in use. <br /> ■ A separate line should be attached to limbs that cannot be dropped safely or are too heavy to be controlled <br /> by hand. The line should be held by workers on the ground end of the rope. Use of the same crotch for <br /> both the safety rope and the work rope should be avoided. <br /> • Cut branches should not be left in trees overnight. <br /> • A service line should be put up for operations lasting overnight or longer and should be used to bring the <br /> climbing rope back Into position at the start of the next day's work. <br /> CABLING <br /> ■ Branches that are to be cabled should be brought together to the proper distance by means of a block <br /> and tackle, a hand winch, a rope, or a rope with a come-along. <br /> K Not more than two persons should be in a tree worming at opposite ends during cabling installation. <br /> ■ When the block and tackle are released,workers in trees should be positioned off to one side in order <br /> to avoid Injury in case the lag hooks pull out under the strain. <br /> Ground men should not stand under the tree when cable is being installed, <br /> TOP PINGILOWERING LIMBS <br /> ■ Workers performing topping operations should make sure the trees can stand the strain of a topping <br /> procedure;if not,some other means of lowering the branches should be used. If large limbs are lowered <br /> in sections,the worker in the tree should be above the limb being lowered. <br /> MIMIMUM CLEARANCE FROM ENERGIZED OVERHEAD ELECTRIC LINES <br /> NQminal system voltage Minimum rated clearance <br /> 0-50kV 9.8ft 3m <br /> 51-200kV 14.7 ft 4.5 m <br /> 201-300 kV 19.7 It 6 m <br /> 301 to 500 kV 24.6 ft 7.5 m <br /> 501-750 kV 34.4 ft 10.5 m <br /> 751-1000 kV 1 44.3 ft 13.5 m <br /> 37 <br />