If your elevator has a functional light curtain installed on the front edge of the elevator car (consult our measurement video for instructions on determining this), and the critical measurement described above between the back of the landing door and the landing sill is 3 inches or less, then no action is required. Light curtains were included as standard equipment from October 2013 onwards by Cambridge Elevating. If your elevator was produced prior to this date and you’re interested in adding this feature, please contact us for more information. If your elevator has a scissor gate with a functional floating gate switch, and the critical measurement described above between the back of the landing door and the landing sill is 3 inches or less, then no action is required.