ASME HST-6:2020 pdf free download – Performance Standard for Air Wire Rope Hoists
chain, hand: the chain provided to control movement of a hand-chain-operated trolley.
control: a device or group of devices that serves to govern in some predetermined manner the power delivered to theapparatus to which it is connected.
control, pendant: a valve system, connected to the hoist or trolley by hoses, that either directly controls flow of air to themotor or controls a pilot-operated valve system at the motor inlet.
control, pull: cords or chains suspended from the hoist by means of which a valve system on the hoist can be operated.control, rod: a rigid rod suspended from the hoist with which a valve system on the hoist can be operated.
cushioned start: a pneumatic or mechanical method for reducing the rate of acceleration of trolley motion.
hazardous (classified) locations: locations where fire or explosion hazards may exist.Locations are classified dependingon the properties of the flammable vapors, liquids,gases, or combustible dusts or fibers that may be present, and thelikelihood that a flammable or combustible concentration or quantity is present (refer to NFPA 70).
headroom: headroom is measured with the load hook at its upper limit of travel and is the distance from the saddle of theload hook to the following locations (see Figure 6-0.2-1):
(a) centerline of the suspension holes on lug-suspended hoists
(b) saddle of the top hook on hook-suspended hoists
(c) wheel treadline on trolley-suspended hoists
(d) supporting surface on base-, deck-, and ceiling-mounted hoistse) uppermost point of hoist on wall- and ceiling-mounted hoists
hoist: a machinery unit that is used for lifting or lowering a freely suspended (unguided) load.hoist speed: the rate of motion that the load hook obtains while lifting a rated load.
hook suspended: suspension of the hoist from a trolley or rigid structure by means of a hook at top of hoist.
lateral hook travel: the lateral movement of the load hook between its position at the upper limit of travel and its positionat the lower limit of travel.
lift: the maximum vertical distance through which the load hook can travel; it is the total hook movement between itsupper limit of travel and its position when at the lower limit of travel (see Figure 6-0.2-1).
lifting devices, below the hook: devices that are not normally reeved onto the hoist ropes, such as hook-on buckets,magnets, grabs, and other supplemental devices used for handling certain types of loads. The weight of thesedevices is to be considered part of the load to be lifted.
limit device: a device that limits equipment motion or takes control of particular functions without action of the operatorwhen a limiting condition is reached.
load hook: the hook used to connect the load to the hoist.
load, rated: the maximum load for which a hoist or trolley is designated by the manufacturer or qualified person.load, working: the external load applied to the hoist, including the weight of load-attaching equipment, such as shacklesand slings.
load suspension parts: the means of suspension (trolley,hook, orlug),the structure or housing that supports the drum,andthe drum, the rope, the sheaves, and the load block.
lug suspended: suspension of the hoist from a trolley[s) or permanent structure by means of a bolt(s) or pin(s) through arigidor swivel-type lug(s).
minimum radius: the smallest radius of the beam, measured to the centerline of the web of the beam,on which thetrolleywill operate.
normal operating conditions: conditions during which a hoist is performing functions within the scope of the originaldesign.