WHAT IS THE RIGGING CAPACITY AND WEIGHT? Calculate the capacity of the rigging configuration.Calculate the lift according to the farthest distance. At a minimum, a dry run should be preformed by placing the empty hook over the pick and set locations measuring radius for each case. The radius must be known and should be measured. WHAT IS THE MAXIMUM RADIUS? The radius is defined as the distance between the center of rotation of a crane and the center of gravity of a freely suspended load.Most loads are shipped to the work site by truck the trucking company weight ticket is a good source for weight information.In any case, the load weight is critical and must be known and verified Many smaller loads can be easily calculated such as a bucket of concrete or a steel beam. WHAT IS THE “VERIFIED” WEIGHT OF THE LOAD? It is not possible to make a safe lift when the weight of the load is not known or verified.The Ten Questions that must be answered include: The crew may need to move the crane a few feet to reduce the radius, significantly improving the capacity and safety of the lift. It has been shown that when a lift plan is required for every lift, the supervisors, operators and riggers catch mistakes before they happen.įor example: The lift could be at a high percent of capacity. It only takes a few minutes and could prevent a costly accident. Then, require the crane operator to complete it before each and every lift. The ten questions can be converted into a simple lift plan form. There are ten questions that must be answered for any lift and could be considered a basic lift plan for standard lifts. 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. Ten Questions That Must Be Answered Before Attempting Any Lift
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