ASME HST-2:2018 pdf free download

ASME HST-2:2018 pdf free download.Performance Standard for Hand Chain Manually Operated Chain Hoists.
(a) saddle of the top hook on hook-suspended hoists
(b) saddle of clevis on clevis-suspended hoists
(c) wheel treadline on trolley-suspended hoists
hoist, hand-chain-operated: a suspended machinery unit that, by use of manual operation, is used for lifting or lowering a freely suspended (unguided) load.
(a) hoist, clevis-suspended: a hoist suspended by means of a clevis or eye at the top of the hoist (see Figure 2-0.2-1).
(b) hoist, hook-suspended: suspension of a hoist from a trolley or rigid structure by means of a hook at the top of the hoist (see Figure 2-0.2.1).
(c) hoist, trolley-suspended: a hoist suspended from a trolley. A hoist can be connected to a trolley by hook or clevis, or the hoist can be integral with the trolley (see Figure 2-0.2-1).
hook latch: a mechanical device to close (bridge) the throat opening of a hook; a rigging aid not intended to support the load.
hft the maximum vertical distance through which the load hook can travel, and is the total allowable hook movement between its upper limit of travel and its lower limit of travel (see Figure 2-0.2-1).
lifting devices, below-the-hook: devices that are not normally reeved onto the hoist chains, such as hook-on buckets, magnets, grabs, and other supplemental devices used for hanging or attaching to the load. The weight of these devices is to be considered part of the load to be lifted.
load: the total superimposed weight on the load block or load hook, including lifting devices.
load block: the assembly of hook or shackle, swivel, bearing, pins, sprocket, and frame suspended by the load chain. This shall include all appurtenances reeved into the load chain.
load hook: the hook used to connect the load to the hoist.
load sprocket: a hoist component that transmits motion to the load chain. This component Is sometimes called load wheel, load sheave, pocket wheel, chain wheel, or lift wheel.
load suspension parts: the means of suspension (trolley, hook, or clevis), the chain, the sprocket(s), the structure or housing that supports the sprocket(s), and the load block.
minimum radius: the smallest radius of the beam, measured to the centerline of the web of the beam, on which the trolley will operate.
overload: any load greater than the rated load.
parts (lines): number of lines of chain supporting the load block or hook.
qualified person: a person who, by possession of a recognized degree in an applicable field or a certificate of professional standing, or by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work
rated load: the maximum load for which a hoist or trolley is designated by the manufacturer or qualified person. reach: the distance from the saddle of load hook at its lower limit of travel to the upper point of the headroom measurement. Reach is equal to lift plus headroom (see Figure 2-0.2-1).
reeving: a system in which a chain travels around sprockets. shall: a word Indicating a requirement.
should: a word indicating a recommendation.
trolley: a wheeled mechanism from which a hoist Is suspended to provide horizontal motion of the hoist along a beam.