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ASME HST-4-2016 pdf free

ASME HST-4-2016 pdf free.Performance Standard for Overhead Electric Wire Rope Hoists.
limiting device: an electrical, mechanical, or electromechanical device for limiting the upward or downward travel of the load hook at the extremities of lift. This device may limit lift at any point within the extremities of lift, if designed to be adjustable.
load: the total superimposed weight on the load block or load hook, including lifting devices.
load hook: the hook used to connect the load to the hoist.
load suspension parts: the means of suspension (trolley, hook, or lug), the structure or housing that supports the 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 bolt(s) or pin(s)
through a rigid- or swivel-type lug(s).
magnetic control: a means of controlling the direction and spd of the hoist and trolley by using magnetic contactors and relays.
nunimum radius: the smallest radius of the beam, measured to the centerline of the web of the beam, on which the trolley will operate.
normal operating conditions: conditions during which a hoist is performing functions within the scope of the original design.
overload: any load greater than the rated load
parts (lines): number of lines of rope supporting the load block or hook.
pendant station: electrical controls suspended from the hoist for operating the unit.
pitch diameter: the distance from center to center of a rope passing over a sheave or wound on a drum, measured across the diameter of the sheave or drum.
power transmission parts: the machinery components, including the gears, shafts, clutches, couplings, bearings, motors, and brakes.
ua1iflcsI person: a person who, by possession of a recognized degree or certificate of professional standing, or who, by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and woric.ASME HST-4 pdf free download.

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