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Causes of Crane accidents:

Overloading, Failure of safety devices, Abnormal conditions; Faulty slinging, signals, placing, etc.; Faulty erection, alteration, and dismantling procedures. 

Investigations of Crane accidents over a number 

of years have shown that many serious accidents 

could have been prevented by the observance 

of reasonable precautions.

 

Understand anti-two block devices, load 

moment indicators, boom angle indicators, load indicating devices, outriggers and pad supports.

All cranes, Lifting gear, tools and tackles must have a current test certificate, which requires renewal at specific intervals.  

Safe working procedure should be in such writing that must be clearly understood by crane driver, maintenance engineer, etc., 

Once any sling has been shock loaded it should be removed from service.

All jib cranes must have an automatic safe load indicator for visual and audible warning when crane begins to operate above the safe working load. The SWL at varying radii must be clearly marked and be visible to the operator. 

EOT crane should be used only for making direct lifts. Dragging can cause the load ropes to leave the hoist barrel grooves, with serious accident.   

The load ratings for mobile cranes apply to firm and level ground only.

Must not lift any load unless satisfied that it is properly slung.

Fall of jib is common types of accident in use of scotch derrick cranes. Such a fall may be due to failure of the derricking rope or part of the derricking mechanism. Such accidents can be prevented by the provision of an effective interlocking mechanism. 

Cross travel, long travel, over winding and over lowering switches should be tested at the beginning of each shift.

Any irregularities found during checks should be reported to department responsible person.

No person shall be employed to operate a crane or to give signals to a crane unless his eye sight and colour vision have been examined. 

 

 

Tandem lifting can be hazardous if not planned properly. Care must be taken that the safe working load of each crane for the required jib length and operating radius should be at least 25% in excess of the calculated share of the load to be handled by each crane during the tandem lift..

Check adjustment of controllers, clutches, brakes, etc., for smooth and accurate control;

Check automatic safe load indicator for proper working;

Check conditions of ropes, chains, and their anchorages;

Check all points mentioned in Crane manufacturer's operating manual;

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