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If the swing is to have two parallel ropes, the standing parts both must hang from the same side of the branch, otherwise there will be forces rotating the swing seat right and left. Swing hitch reduces such forces by having the end pull the main part towards the middle of the beam and fixing it there; Using a simple clove hitch would cause ...
Consider the set of pulleys that form the moving block and the parts of the rope that support this block. If there are n of these parts of the rope supporting the load F B, then a force balance on the moving block shows that the tension in each of the parts of the rope must be F B /n. This means the input force on the rope is F A =F B /n.
Rigging is the equipment such as wire rope, turnbuckles, clevis, jacks used with cranes and other lifting equipment [1] in material handling and structure relocation. Rigging systems commonly include shackles , master links and slings , and lifting bags in underwater lifting.
Lifting a heavy timber with a block and tackle on a tripod. 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 ...
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.
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