Ensuring a proper soils report is critical along with using outrigger pads that are large enough to reduce the pressure applied by the crane. Ground conditions become a large issue when the ground bearing pressure of the soil is less than the amount applied by the crane. For example, when an operator sets up a crane along the street with one side fully extended and another partially it creates stability issues when swinging over from one side to the other. Two of the most common situations are improper outrigger setup and poor ground conditions. These factors could be caused by a lack of awareness of the operator, supervisor, rigger, signalperson, and/or external forces exerted on the crane There are several factors that determine the exact capacity (such as boom length, counterweight, etc) However, even when a crane has a predetermined capacity at a given radius within a crane’s particular configuration there are still a few factors that affect a cranes capacity beyond what is stated on the load charts.
Every mobile crane has a set capacity that it can hoist within a given radius of that crane.
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