L66A3 Mast Section For Tower Crane Masts

Products Specification

Type , Model: L66A3 Mast Section For Tower Crane Masts

Size: 2mx2mx3m 

Materials: Q345B

Within: Pins, bolts, Ladder, Platform

Process: Blasting derusting, 

Painting:  Under painting , Middle painting, Surface painting.

Our factory produce and supply almost all famous brand tower crane :Mast section, Anchor Frame, Fixing angle ,Adaptor and so on as good quality and price.

L66A3 Mast Section For Tower Crane Masts

Tower Crane Knowledge sharing：

Rules for safe operation of tower crane: mechanical, personnel, environment, operation, etc..

The power supply should be turned on and the metal structure part should be checked for no leakage.
(14) In the event of difficulties in the normal command of a tower hanging away from the ground in the control room, there may be two commanding personnel at high altitude and on the ground, or effective contact methods such as walkie-talkies may be used to command.
(15) Safety protection devices, such as barometer, walking limiter, moment limiter, hook height limiter and various stroke limiter switches, must be complete, sensitive and reliable, and must not be arbitrarily adjusted and removed. It is strictly forbidden to replace the control mechanism with a limiting device.
(16) The commander of the tower crane must be certified for duty and should work closely with the operator. Operators must also be certified for duty, and should strictly execute the signals of the command staff during the operation. If the signal is unclear or wrong, the operator should refuse to perform it.

If an accident is caused by an error in command, the commander shall be responsible.

L66A3 Mast Section For Tower Crane Masts

(17) No person is allowed to stay, work or pass under the lifting arm or heavy object during the lifting operation of the tower. When lifting heavy objects, it is forbidden to pass over people. It is forbidden to carry people by tower.
(18) Tower lifting machinery must carry out lifting operations in accordance with regulations, and must not overload or lift objects of unknown weight.

In special cases, when overloading is required, it must be checked, there are technical measures to ensure safety, and with the approval of the person in charge of the enterprise's technology, there must be a person in charge of the on-site supervision before lifting, but it must not exceed 10 % of the limit.

L66A3 Mast Section For Tower Crane Masts

(19) The lifting and landing speed of heavy objects must be uniform, and it is forbidden to creep and brake suddenly. The left and right rotation action should be stable, and no reverse action must be made before the rotation is stabilized. Non-gravity descending tower crane, no free drop is allowed.
(20) The minimum distance from the top of the tower hook device to the bottom of the car frame: 1000mm at the upper rotary rate of 2 times, and 700MM at the 4 times rate; The downward rotation is 800mm at 2 times. The rate of 4 times is 400mm, which should immediately stop lifting.
(21) During the operation, when the operator temporarily leaves the operating room, he must cut off the power and lock the rail clamp. After the operation is completed, the tower crane should be parked in the middle of the track, the lifting arm should be turned to the downwind direction, and the rotary brake should be released.

The car and balance weight should be placed in a non-working state, and the hook should rise to 2 to 3M from the top of the lifting arm.

L66A3 Mast Section For Tower Crane Masts

(22) It is strictly forbidden to hang heavy weights in the air for a long time. In case of sudden failure in operations, measures should be taken to land heavy objects in a safe place, and the motor should be turned off or the power supply cut off for maintenance.

 In the event of a sudden power outage, all controllers should be immediately put to zero, the main power switch should be disconnected, and measures should be taken to safely reduce the weight to the ground.
(23) It is strictly forbidden to use a tower crane for lifting, sloping and lifting heavy objects laid or condensed on the ground. Concrete members or templates poured on site must be fully loose before they can be lifted.
(24) When lifting heavy objects, they should be tied smoothly and firmly, and must not pile or hang sporadic items on heavy objects. Sporadic materials and objects must be firmly tied with hanging cages or wire ropes before they can be lifted.

 Items marked with the location or marking shall be tied according to the marked position. The angle between the tied wire rope and the object shall not be less than 300 °

L66A3 Mast Section For Tower Crane Masts

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(25) When the lifting load reaches 90 % or more of the fixed lifting weight of the tower, the weight shall be lifted from the ground 20 to 50 cm to stop lifting and perform the following inspections: stability of the crane, reliability of the brake, stability of the weight, and firmness of the tying. After confirmation, you can continue to lift. For heavy objects that may be shaken, Shuanlasheng must be killed.

What is often referred to as the "four meetings" of the tower crane operation?
Four sessions will be used, will be maintained, will be checked, and will troubleshoot
Will use: in the rental, concentrate on the operation of the procedures, in practice constantly grope and accumulate experience, fully develop the potential of equipment, and prevent personal and equipment accidents.
Will maintain: Be careful to do regular maintenance and routine maintenance, according to the lubrication requirements of each part, to achieve fixed quality, quantity, timing, fixed point refueling lubrication.
It will inspect: perform pre-shift inspection and trial operation carefully, ensure the safety and reliability of various safety devices, braking devices, controllers, etc., and report problems in a timely manner.

L66A3 Mast Section For Tower Crane Masts

During the operation, the operation of the equipment is carefully observed and judged from the sound. If there is an anomaly, it should be stopped for inspection and the maintenance personnel should find out the reason.

Will troubleshoot: the tower crane general mechanical and electrical fault should be self-removal, the larger failure contract maintenance personnel jointly.

In case of personnel and equipment accidents, keep the scene and report immediately to the leader