Safe Work Practices and Urban Forestry
Regulations and PPE
Arboricultural operations follow ANSI Z133 and applicable OSHA rules. Personal protective equipment includes a helmet with chin strap, eye and hearing protection, chainsaw chaps, and sturdy boots. Inspect the tree and the work zone before climbing, and identify electrical hazards first.
Working aloft
Use a climbing line plus a work-positioning lanyard so you have two attachment points when operating a chainsaw aloft. Tie in to sound wood, above the work, and keep the system inspected. Aerial lifts require trained operators, harness attachment, and a controlled drop zone.
Electrical hazards
Respect minimum approach distances. The usual baseline is 10 feet for conductors rated up to 50 kV, increasing with voltage; only qualified line-clearance arborists may work within those distances, and the limit applies to every part of the tree, tool, or load - not just the climber's body.
Ground operations
Control the drop zone, use proper rigging, and rig within the capacity of the gear. Keep chippers fed from the side, never reach in, and keep loose clothing away from the feed.
Urban forestry
Know inventories, canopy-cover goals, tree ordinances, appraisals, and the 10-20-30 diversity rule: no more than 10% of one species, 20% of one genus, 30% of one family. "Right tree, right place" prevents most future conflicts.
Worked example
A climber must limb a branch that overhangs a 12 kV distribution line. The 10-foot minimum approach distance applies to the branch, saw, and rope, so the work requires a qualified line-clearance arborist or de-energization - not just care.