All deductible items must be subtracted from the “gross” capacity to establish the “net” capacity.
The radius must be known and should be measured.
This list should be considered as the basics, i.e., a lift plan for standard lifts. There are ten questions that must be answered for any lift.
In my experience, the majority of crane accidents result from lifts that are classified as standard when in fact there is nothing standard about any lift. In most cases there is little or no planning – and when things go wrong – accidents result. We don’t do as well on the everyday routine or standard lifts. These major lifts are executed with precision and are successful if the plan is carefully followed. As an industry, we do a great job planning critical and super lifts. When attempting any lift, regardless of how small or seemingly insignificant, there is some basic information that must be known and confirmed before you begin.