There are three type of configurations allowed in ASME A18.1-1999:
Rule 2.1.1: Runway Enclosure Provided
- Must have a sold enclosure runway extending from the bottom landing to a height of 42" above the top landing.
- The interior surface must be smooth.
- Minimum of a 42" high self closing unperforated gate at the upper landing.
- Maintain a 2 to 3" running clearance between side guards and unit or enclosure.
- 6'-8" min. door at the lower landing.
- Running clearance of 3/8 to 3/4" on all enter/exit sides.
- Door can be up to 3" away if 60 to 75° header is provided to eliminate shear hazard.
- 42" high side guards with grab rail on platform.
- Emergency stop and alarm on platform controls with key operation.
- Constant pressure controls.
- Gates and doors must be provided with a combination mechanical lock and electric contact.
Rule 2.1.2: Runway Enclosure Not Provided
- The underside of the platform to be guarded on all sides.
- The toe guard is to extend at least 3" above the upper landing by solid or telescoping means.
- Minimum of 42" high self closing unperforated gate at the upper landing.
- 42" high side guards with grab rail on platform.
- Unperforated vertical fascia extending from the upper landing sill to the level of the lower landing sill.
- 42" high self closing unperforated gate on platform.
- Lower landing unperforated gate or door.
- Emergency stop on platform controls with key operation.
- Constant pressure controls.
- Gates and doors must be provided with a combination mechanical lock and electric contact.
Rule 2.1.3: Attendant Operated Lifts
- Attendant call device at each landing.
- Constant pressure control located where the attendant has full view of the floor area under the lift and full view of the lift throughout its travel.
- Emergency stop switch is only control allowed on platform.
Note: Attendant operation is allowed by ASME, but does not meet ADA guidelines. Consult factory.
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