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Counterweight

From RitchieWiki

Mechanical Features and Designs

A counterweight is force or influence counteracting another force. In the construction industry, a counterweight typically refers to a type of weight mechanism used to counterbalance or leverage a load.[1] For example, counterweights are sometimes affixed to construction equipment as a feature used to offset large loads and prevent machines from tipping over.

Counterweights are used on all types of cranes to provide leverage when lifting. One such crane is the K -10,000, the world’s largest tower crane, standing 394 feet (120.1 m) in height when erected with an extended reach spanning 295 feet (90 m).[2] Due to its sheer size, the K-10,000 has to use two different types of counterweights, or what are sometimes called counterweight blocks—a fixed counterweight and a mobile counterweight. The fixed counterweight straddles the outer end of the crane’s jib. The mobile counterweight is a movable weight suspended from two trolleys that travel back and forth between their maximum and minimum radii along the length of the jib.[3] Once the base of a tower crane is erected, the counterweights are usually installed on the jib using a mobile crane.[4]

[edit] References

  1. Counterweight. The Free Dictionary. 2008-09-29.
  2. Machines and Engineering Vehicles. Discovery Channel. 2008-09-29.
  3. Tower Crane. Towercrane. 2008-09-29.
  4. Tower Crane. Towercrane. 2008-09-29.