Which option best summarizes the A18.1 frequency requirement for non-residential and residential lifts?

• A. Daily for non-residential, yearly for residential
• B. Weekly for non-residential, monthly for residential
• C. Monthly for non-residential, every two years for residential
• D. Every 6 months for non-residential; yearly for residential

Answer: (D)

The main idea here is how often lifts must be inspected and tested, and how that interval changes based on how the lift is used. Non-residential lifts see higher traffic, more frequent use, and greater exposure to wear and potential faults, so they require more frequent checks to catch issues before they become unsafe. That’s why the requirement calls for inspections and tests every six months for non-residential installations. Residential lifts, used by fewer people and with lower overall usage, don’t demand such frequent scrutiny; an annual inspection schedule provides a safe, practical balance between safety and maintenance effort.

So the best fit is six months for non-residential and yearly for residential, reflecting the difference in operating conditions and risk. The other options imply frequencies that are either too aggressive for residential use, too lax for non-residential use, or not aligned with the typical safety posture for elevating equipment.