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Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
A team of riggers design and install the lifting or rolling equipment needed to raise, roll, slide or lift objects such as heavy machinery, structural components, building materials, or large-scale fixtures with a crane, hoist or block and tackle. Rigging comes from rig, to set up or prepare.
The above standards are a published specification that establishes a common language and contains a technical specification or other precise criteria. They are designed to be used consistently as a rule, guideline or definition. All personnel must be suitably trained. All manufacturers of lifting equipment are obliged to send out instructions ...
Hoist controller, a machine for raising and lowering goods or personnel by means of a cable; Hydraulic hooklift hoist, another machine; Hoist (mining), another machine; Hoist (flag), the half of a flag nearer to the flagpole; Hoist, by Phish; USS Hoist (ARS-40), a Bolster class rescue and salvage ship acquired by the U.S. Navy during World War II
Now many hoists are package hoists, built as one unit in a single housing, generally designed for ten-year life, but the life calculation is based on an industry standard when calculating actual life. See the Hoists Manufacturers Institute site [2] for true life calculation, which is based on load and hours used. In today's modern world for the ...
The crane's hook is kept level by automatically paying out enough extra cable to compensate for this. This is also a purely mechanical linkage, arranged by the reeving of the hoist cables to the jib over a number of pulleys at the crane's apex above the cab, so that luffing the jib upwards allows more free cable and lowers the hook to compensate.
Hydraulic hooklift hoists are mounted on heavy duty trucks to enable hauliers to change out flatbeds, dumpster bodies, and similar containers. Primarily used in conjunction with tilt frame bodies and specialised roller containers , generally designed for the transportation of materials in the waste , recycling , scrap and demolition industries ...
To hoist the steel, structural ironworkers use cables connected to the crane to lift the beams onto the steel columns. A rope called a tagline is attached to the beams so an ironworker can control them when needed. The crane hoists steel into place, and the ironworkers position the beams with spud wrenches to align bolt holes.