Tower crane hoisting height regulations have

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Liftingheight also called hook heightis the vertical distance from the surface of the concrete foundation of the tower crane to hook.On the trolley towercrane, its maximum lifting height is immutable,the pitch luffingtower crane, its amplitudevaries with differentlifting height, lifting height than the minimumamplitude high top tens m, so the pitchluffing tower crane has an advantage in startingthe lift.
Tower crane lifting height includes two parameters, lifting height of one towerinstallation free height, the second is the maximum lifting height of the tower craneattached when thetower crane when installing free height without attachment,usually tower crane It can reach 40 meters, to meet the needs of high-rise buildingsbelow.
In order to prevent the ultra-hightower crane hook liftingaccidents and damageto the equipment, on each towercrane was equipped with a height limiter, when thehook rises to 1-2 meters away from the boomhoist is automatically cut off power to prevent the hook continue to rise.
Lifting speed not only with the lifting mechanism, but also to overridehook pulley about2 to 4 timesfaster rope rope, single rope twice as fast than the 2 ropes.