Hoistway, pit and machine space
Under Plano’s residential code, a private-residence elevator has to meet ASME A17.1 Section 5.3, including its rules for the hoistway enclosure and the landing doors. Beyond that, the model’s drawings set the numbers: pit depth below the lowest landing, overhead clearance above the top landing, the size of any machine room and the electrical supply the drive needs. Those numbers decide how much slab, framing and wiring work the house needs before the equipment arrives.
Door safety and the 3/4 x 4 rule
The space between the landing door and the cab gate is the main safety detail at each floor. The industry’s 3/4 x 4 rule keeps the landing door within 3/4 inch of the sill edge, and the gap between the closed landing door and the gate small enough that a 4-inch ball will not pass. Federal safety regulators have warned that children can be trapped and crushed in deeper gaps, and older installations can be corrected with space guards on the landing door or electronic monitoring.
Car size for wheelchairs
A cab for a wheelchair user needs floor area for the chair and, if needed, a helper, plus a door wide enough to roll through without scraping the frame. Doors on adjacent or opposite sides change how the chair enters and leaves. The code’s accessibility section applies only where the elevator is part of a required accessible route, so in a private house the cab size is your decision; measure the chair, footrests included, and size the cab around it.
Where space is tight, through-the-floor home lifts need no hoistway. Every option is on the Plano Home Elevators home page.