22.214.171.124.5 Space on Top-Of-Car Enclosure
(a) An unobstructed horizontal area not less than 0.5 m2 (5.4 ft2) shall be provided on top of the car enclosure. It shall measure not less than 600 mm (24 in.) on any side. This area shall be permitted to include the space used for the top emergency exit [see 126.96.36.199.1(f)]. The minimum vertical distance in the space between the top of the car enclosure and the overhead structure or other obstruction shall be not less than 1100 mm (43 in.) when the car has reached its maximum upward movement.
(b) Any horizontal area above the car enclosure top and within the railing, if supplied, that could contain a circle with a diameter equal to or greater than 350 mm (14 in.) that does not have a vertical clearance of 1100 mm (43 in.) when the car has reached its maximum upward movement shall be clearly marked. The marking shall consist of alternating 50 mm (2 in.) diagonal red and white stripes. In addition, when markings are provided, sign(s) with the words "DANGER LOW CLEARANCE" shall be prominently posted and shall be visible from the hoistway entrance(s). The sign(s) shall
(1) conform to the requirements of ANSI Z535.4 or CAN/CSA-Z321 (see Part 9)
(2) be made of durable material and be securely fastened