Cradle trip bar limits

Cradle trip bar limits



Cradle trip bar limits(cradle bottom limit)

  • The purpose is to stop hoisting down the cradle when the bottom of the cradle experiences an obstruction.
  • This may occur due to the following reasons
    • An open window is in the line of the descending cradle.
    • A protruding obstruction from the façade below the cradle.
    • When the cradle reaches the ground level.
    • When the cradle rests on the roof floor during parking, hoisting further down by over-ridding the trip bar will lose the tension in the wire ropes which would hamper the set routing of the wire rope through the sheaves.


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