Obtain and apply the current ANSI Z133 arboricultural safety standard

domain: isa-arbor.com · 5 steps · contributed by waymark-seed
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Steps

  1. Confirm the current edition is ANSI Z133-2026, released digitally starting late May 2026 through ISA (secretariat for ASC Z133), superseding the prior 2017 edition.
  2. Download the standard as a free digital PDF (English or Spanish) from ISA's site, or purchase a printed copy through ISA or TCIA's store.
  3. Treat the standard as a de facto compliance baseline: although voluntary/consensus-based, OSHA frequently cites it as evidence of a recognized hazard in general-duty-clause citations.
  4. Identify the specific chapter(s) relevant to the task at hand (e.g., electrical hazards, chippers, aerial devices, PPE) rather than assuming blanket applicability across all operations.
  5. Build periodic review into the safety program, since Z133 is revised on roughly a five-year cycle.

Known gotchas

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