Training for future crane operators
When it comes to working with cranes, safety is the first and most important thing and is not so easy to be fully taken care of.
While all aspects of safe approach to utilization of a crane are hard to cover, we will cover some basic things to give you an idea.
Besides being certified, a crane operator must completely read and understand the manufacturer’s manual and undergo machine-specific training, provided by other operator/supervisor/certified technician who is familiar with the particular machine.
It is the fact that most crane accidents are caused by operator error. Frightening? It should be.
Before commencing operation on any site, the crane operator must make a plan, considering following:
– Job Requirements
– Work place rules and procedures
– Identify all hazards
– Implement hazard control strategies
Must ask the question: Is this the right crane for the job? Can it be placed in the desired position, set up safely on stable ground and execute lifting while complying with all the rules, procedures and the manufacturer’s specifications? Can it be packed up and can it leave site afterwards without any problems?
Power lines – the largest killer of crane crew. This is a fact.
Minimum distances must be maintained at all times, and in NSW they are:
– 3m from electrical power lines up to 130,000 volts
– 6m from electrical power lines from 132,000 volts and up to 330,000 volts
– 8m from electrical power lines over 330,000 volts.
In case voltage can not be established, stay 8m away with any part of crane or load from power lines. Sag of lines and wind conditions must be incorporated in measuring the safe distance.
In case of the crane coming in contact with power lines, the operator needs to:
– stay calm – panic only makes the situation worse
– remain in the cabin until the power is disconnected
– warn others to keep away from crane, load and power lines
– if possible, try to move the crane or load away from power-lines using crane controls
– if you have to leave the crane (hydraulic caught fire etc.), inform the dogman of your intention, jump well clear avoiding contact with the crane and the ground at the same time
– do not use the crane until it is checked by a qualified person
– report the incident to relevant electrical authority
Maximum Rated capacity of any crane determines it’s “size”. So, what is maximum rated capacity?
It is maximum SWL – safe working load – that the crane can handle. SWL?
SWL is not the tipping or the breaking limit of a crane, it is the load that can be handled safely (in Australia, for slewing mobile cranes it is 75% of tipping point, 66.6% for non-slewing cranes and 80% for vehicle loading cranes) with given configuration, at given radius.
Correct reeving of multiple rope falls: