PDFWAC 296-874-30012
Make sure scaffold hoists meet these requirements.
(1) You must make sure the stall load of any scaffold hoist is not more than three times its rated load.
(2) You must make sure the design of scaffold hoists has been tested by an independent nationally recognized testing laboratory.
(3) You must make sure scaffold hoists have both a:
(a) Normal operating brake; and
(b) Braking device or locking pawl which automatically engages when the hoist has an uncontrolled:
(i) Instantaneous change in momentum; or
(ii) An accelerated overspeed.
(4) You must prohibit use of gasoline-powered hoists on suspended scaffolds.
(5) You must enclose the gears and brakes of power-operated hoists used on suspended scaffolds.
(6) You must make sure manually operated hoists need a positive crank force to descend.