The general rules for crane selection are as follows:
- Establish the maximum radius from the centre of slew
- Calculate the total weight of the load*
- Check clearance height under ceiling (if any) an issue.
- Allow for distance from jib head to the hook.
- Allow for the hook height required with associated lifting equipment.
- Allow for the height of obstructions between crane and load.
- Allow for obstructions which may hinder the counterweight when slewing.
- Allow for obstructions the crane may need to work around when setting up.
- Consider what Boom length will be required.
- Ensure the ground can support the crane.
Allow for how the crane will access and leave the site
* The total weight of load is obtained by adding:
actual load weight + crane hook block + slings, spreaders, shackles + any other lifting attachment. The total of these must not exceed any load capacity listed for the crane specification.
Which crane is the right one for the job?
We’re more than happy to carry out a site inspection or in many cases we can ask a few questions to help identify the correct crane. This may result in a larger or a smaller crane being provided to enable the work to be completed more cost effectively and in less time.