Current through Register Vol. 54, No. 50, December 14, 2024
(a) Power-driven dumbwaiters shall be provided with one or more iron or steel hoisting cables, equivalent tapes, or chains. If cables are exposed to corrosion, they shall be covered with marline or other equivalent protective covering.(b) The loads on hoisting cables shall be determined by the factors of safety as given in the following curve, in accordance with the rated speed of the car: Click to view image
(c) The hoisting and counterweight cables of all power-driven dumbwaiters shall not be lengthened or repaired by splicing.(d) The drum ends of new hoisting and counterweight cables shall be secured by clamps placed on the inside of the drums.(e) Cables secured to winding drums shall have not less than one complete wrap of the cable around the winding drum when the car or counterweight has reached the extreme limit of its travel.