Elevator and Escalator Code Compliance
What this domain tests
The code-compliance domain checks whether you can apply the adopted elevator and escalator codes to real installations, not just recite them. In Ohio, ASME A17.1/CSA B44 governs new elevators, escalators, dumbwaiters, and moving walks; A17.3 governs existing elevators; A17.2 is the inspection and test standard. The exam asks you to identify the controlling edition, classify a condition as new versus existing, and recognize dimensional and electrical limits.
Core rules
- A17.1 is an installation code covering hoistway enclosure, pit access and lighting, machine-space access, clearances, door locking, safeties, buffers, and escalator step/skirt/combplate geometry.
- A17.3 does not retrofit every A17.1 requirement; it sets minimum safety requirements for existing units.
- A17.2 tells the inspector what to examine and test; it does not set installation dimensions.
- Escalator skirt panels must be close to the steps. The common A17.1 limit is a maximum 4 mm (5/32 in) clearance at the step/skirt interface on each side.
- Combplates must mesh with step cleats and be adjusted so steps do not strike. Missing teeth or a raised comb are defects.
- Door interlocks must prevent motion with a door unlocked. Bypassing an interlock is a code violation, not a troubleshooting shortcut.
Worked example
A new escalator is measured with a 5 mm (0.20 in) gap between the step edge and the skirt panel on one side. The mechanic argues that the average of both sides is 4 mm, so it passes. That is wrong. The limit applies at each side, and 5 mm exceeds the 4 mm maximum. The unit is noncompliant until the skirt panel is adjusted or replaced and the clearance is rechecked at multiple step positions. The reasoning is code-based: you do not average a maximum limit, and you do not accept a new installation because it runs smoothly.
Traps
Using the newest A17.1 edition when Ohio has adopted a different edition; citing A17.2 as if it were an installation code; applying A17.3 to a new building; measuring escalator clearance at only one point; and treating a smooth ride as proof of code compliance.