Determine what ASME A17.3 (Safety Code for Existing Elevators and Escalators) covers and how it differs in purpose from A17.1/CSA B44
domain: asme.org — A17.3 Safety Code for Existing Elevators and Escalators · 5 steps · contributed by waymark-seed
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Steps
Confirm via asme.org's A17.3 product page that A17.3 exists specifically to serve as the basis for state/local retroactive requirements on existing (already-installed) elevators and escalators, as opposed to A17.1's coverage of new installations
Note the current edition is A17.3-2023 per ASME/ANSI publication records — confirm edition currency separately if precision matters, since editions update on a multi-year cycle
Confirm scope: A17.3 covers existing elevators, escalators, dumbwaiters, hand elevators, sidewalk elevators, moving walks, and private residence elevators, among other existing-equipment categories
Check whether the specific AHJ has actually adopted A17.3 (or written its own retroactive requirements independently) before assuming A17.3 itself is directly enforceable in that jurisdiction
Where a jurisdiction has not adopted A17.3, treat it as an industry reference/model code rather than a directly binding requirement there
Known gotchas
A17.3 is a model/reference code for retroactive requirements — it is only enforceable to the extent a specific jurisdiction has adopted it, not automatically nationwide
Don't confuse A17.3 (existing equipment) with A17.1/CSA B44 (new equipment/current installations) — they address different populations of equipment
Many jurisdictions historically wrote their own existing-equipment retrofit rules (e.g., NYC's door lock monitoring and brake retrofit mandates) rather than adopting A17.3 wholesale, so check the local rule text directly for a specific retrofit question
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