(1) Two separate automatic stop devices shall be provided to cut off the power and apply the brake when a loaded step passes the upper terminal landing. One of these devices shall consist of a switch mechanically operated by the belt or step roller. The second device shall consist of any of the following:
- (a) A roller switch located above but not in line with the first switch;
- (b) A photocell and light source (an "electric eye"); or
(c) A switch activated by a lever, bar, rod, or plate.
- (i) If a plate is used, it shall be positioned above the head pulley so it barely clears a passing step.
- (ii) If a bar is used, the bar shall be of the "breakaway" type.
- (2) The stop device shall stop the lift before a loaded step reaches a point 609.6 mm (24 in.) above the top terminal landing.
- (3) Once the lift has stopped, the automatic stop device shall be manually reset. Therefore, this device shall be located on the top landing where the person resetting the device has a clear view of both the "up" and "down" runs of the lift; and it shall be impossible to reset from a step.
- (4) Stop devices shall comply with the requirements found in the current adopted edition of ASME A90.1.
[Statutory Authority: RCW 70.87.030. WSR 23-17-141, § 296-96-24457, filed 8/22/23, effective 10/2/23. Statutory Authority: Chapter 70.87 RCW. WSR 21-18-096, § 296-96-24457, filed 8/31/21, effective 10/1/21; WSR 18-18-070, § 296-96-24457, filed 8/31/18, effective 10/1/18.]