Cradle trip bar limits

Description

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.