Specifications Pertaining to Pruning of Trees Sample Clauses

Specifications Pertaining to Pruning of Trees a. No tree shall be cut in such a manner that its health or eventual safety will be impaired. Exceptions will be made only in cases of tree pruning or removal for emergency relief of immediate danger to persons or property. Any such emergency procedures must be reported promptly to the Senior Urban Forester with plans for completion or follow-up work submitted for approval. b. A reduction pruning cut removes the terminal portion of a stem or branch. This type of cut is used to maintain height, correct storm damage, subordinate competing limbs and to reduce the perimeter of a crown. The cut is made back to a living side branch that is at least ⅓ (minimum) to ½ (optimal) the diameter of the cut branch. Such cuts shall be considered proper only when such remaining limb is vigorous enough to maintain adequate foliage to produce woody growth capable of closing the pruning cut within a reasonable period of time. c. A thinning pruning cut removes a branch back to its parent stem or the trunk. The purpose is to reduce canopy density and eliminate conflicts or competition between limbs. Such cuts shall be considered proper only when the natural bark protection zone is not breached, nor a stub left. d. Crown topping, heading, lion’s tailing, tipping or rounding-over shall be considered improper pruning methods and shall not be employed to any degree unless specifically required by City Forestry. The exception is that a one year old shoot may be headed back to a bud where appropriate. e. All final tree trimming cuts shall be made in such a manner as to favor the earliest possible closure of the wound by natural callous growth. Flush cuts shall not be made. Flush cuts are defined as pruning cuts made to the inside of the branch collar. All final cuts should be made just outside the natural branch collar without leaving a stub. f. In conducting tree pruning operations, all work shall be performed using methods and equipment in such a manner so as to avoid and prevent damage to other plants (except minor damage to turf), properties, structures or persons. The ANSI Z133.1
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