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| Equipment attached to the superstructure of a crane that extends upward at an angle; used to support or guide objects being hoisted or suspended |
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| Lengths of wood timbers or steel beams used to temporarily support construction material or equipment |
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| Point of support on which a lever pivots |
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| Simple machine consisting of a rigid bar that is pivoted on a fixed point called a fulcrum; used to transmit force |
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| A wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull |
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| Inclined plane that connects different levels |
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| An individual who selects the rigging hardware, connects the rigging hardware to heavy objects, and directs the hoisting, moving, and placing of these heavy objects |
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| prosses of hosting, moving, and placing heavy objects |
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| Slings, rope, and attachment hardware used to hoist an object |
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| metal or wood to use in a narrow crevasse; used for splitting, tightening, securing or leveling |
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maximum amount of a load that should be placed on rigging equipment during normal service.
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Formula- WIL=8(D2), 3/4 wire rope
(3/4 x 3/4) x 8= 4 1/2 tons
(.750x.750)x8=4.5 tons |
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Definition
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Sling Stress (angle is less than 90)
W=weight of material
N=number of legs(a leg is one sling in a set of slings)
L=length of sling(distance from where the sling leaves the load to the hook)
H=vertical height(distance from the hook to the load)
L x W = Sling Stress Or L÷H x W÷N = Sling Stress
H N |
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Definition
L=10
H=8
W=3000
N=2
10 x 3000 = 1875
8 2
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| Lifting of an object which could result in injury or death to individuals or large party property damage if the hoist is not completed properly. |
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| mixture of two or more elements, one is a metal |
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| Rigging hardware flanged on the end, that has a grooved or smooth cylinder surface used to store wire rope |
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