2013年7月19日星期五

10 initiatives to avoid tipping hoisting cranes


10 initiatives to avoid lifting crane tipping: 1. Crane traveling on the road must be flat, solid, reliable parking place must be flat. (2) Cranes shall not be allowed to park in the ramp lane two crawler cranes ......
1   Hoist and trolley   traveling on the road must be flat, solid, reliable parking place must be flat.

2  Cranes shall not be allowed to park in the ramp lane crawler crane two legs remain part of a high or a low or soft soil a hard one.

3 When lifting slings to keep the vertical component shall not exceed the crane swing radius drag diagonally to avoid overload and wire rope slippage, or pull off the ropes leaving the crane instability. Lifting heavy component should be set pull rope.

4 lifting operation of a crane boom lifting, lowering, slewing shall be stable in the air at the same time to try to avoid shaking the emergency brake or shock and vibration phenomenon. Failing to take technical measures and without the approval of the relevant technical department in order to avoid lifting crane overload prohibited accelerated wear of mechanical parts and causing the crane tipping.

hoist and trolley  running at full capacity should be avoided; at full load or near full load non-simultaneous promotion and rotation (turning or lifting and horizontal lifting and walking) two actions so as to avoid uneven roads or inertial force causes such cranes overload and lead to a rollover accident.

6 When two simultaneous operation of hoisting machinery hook when two machines should be maintained between the suspension means more than 5m safe distance to avoid a collision.

7 double lift crane components when the crane lifting capacity under a reasonable load distribution (mass not exceeding two lifting cranes allowed the sum of 75% from the weight of each crane load should not exceed the safe load capacity 80%). Lifting operations must be under the unified command motor coordination Simultaneously lift and move and make two crane hooks, pulley block should basically remain vertical. Two cranes driving staff to closely cooperate with each other to prevent a crane weightlessness leaving another crane overload.

8 hoisting should be a person responsible for the unified command commanding officers should be located in the operator's vision and place and to be able to clearly see the lifting of the entire process.  hoist and trolley  drivers must be familiar with the signal according to various signals commanding officers to operate; unified command signal should be specified in advance signals should be clear and accurate.

9 is equal to or greater than six of the wind in the open air is prohibited mobile crane and lifting operations.

10  hoist equipment  stops working when stopped turning and running gear lock cab doors. Hook suspension members and should not be raised to a height so as to avoid wounding and causing crane swing instability.

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