Find where these intersect and that is the maximum lifting capacity – in our example the crane can lift 5.6te based on our working ranges (sometimes it can be beneficial to increase the main boom length because it can increase the lifting capacity in some cases). Note that this lifting capacity data table is for the crane setup with 9.5te of ballast and fully rigged. It is worthwhile checking the other lifting capacity data tables to see if the lift can be completed with less ballast because this can often mean you can either use a smaller crane size or the crane can travel with less ballast which can be cheaper. To summarise, calculating the crane size you need can be a bigger task than first expected.
There are many factors that need to be accounted for. The main factors are weight, radius and height but it is also important to go beyond this and consider other factors such as obstructions, space and the crane’s configuration.
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