3×5 Rule

(ASME ANSI A17.1 National Safety Code for Private Residence Elevators)

A. Clearance between Hoistway Door(s) or Gate(s) or Landing Sill(s) & Car Door(s) or Gate(s) shall not exceed 3 inches.

B. Clearance between Hoistway Face of Landing Door(s) or Gate(s) & the Car Door(s) or Gate(s) shall not exceed 5 inches.