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The NIOSH lifting Equation does have some limitations which include: Only using one hand for lifting/lowering; Lifting or lowering for over 8 hours; Lifting or lowering while in the seated or kneeling position; Lifting or lowering in restricted areas (where full range of motion cannot be achieved; Lifting or lowering unstable objects
A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
Lifting equipment, also known as lifting gear, is a general term for any equipment that can be used to lift and lower loads. [1] Types of lifting equipment include heavy machinery such as the patient lift , overhead cranes , forklifts , jacks , building cradles, and passenger lifts, and can also include smaller accessories such as chains ...
Moving an object up an inclined plane requires less force than lifting it straight up, at a cost of an increase in the distance moved. [4] The mechanical advantage of an inclined plane, the factor by which the force is reduced, is equal to the ratio of the length of the sloped surface to the height it spans.
A lifting bag is an item of diving equipment consisting of a robust and air-tight bag with straps, which is used to lift heavy objects underwater by means of the bag's buoyancy. The heavy object can either be moved horizontally underwater by the diver or sent unaccompanied to the surface. [1] Lift bag appropriate capacity should match the task ...
The use of shackles or restraints on pregnant women is a common practice in prisons and jails in the United States. [1] Shackling is defined as "using any physical restraint or mechanical device to control the movement of a prisoner's body or limbs, including handcuffs, leg shackles, and belly chains". [2]
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It was primarily used during the Roman period and the Middle Ages in the building of castles and cathedrals. The often heavy charge is lifted as the individual inside the treadwheel crane walks. The rope attached to a pulley is turned onto a spindle by the rotation of the wheel thus allowing the device to hoist or lower the affixed pallet.