Liebherr crawler crane LR 1300 operating in Florida, United States. It enables the rental company to continue to work when normally a job would not be possible due to the wind. Customers say that the new WindSpeed load charts mean that the crane is no longer the limit for jobs like before. load capacity with a simple push on the control panel.Īnd this enhanced safety and increased crane availability has been very well received. At wind speeds of 10-16 m/s, the driver can automatically adjust the max. The respective status is shown in the cabin at all times. If the wind conditions become too dangerous, the system issues a warning. Both the measured wind speed and the respective configuration of the crane (boom length, angle of the boom) are taken into account in order to calculate the current situation of the crane. The latest generation of LR crawler cranes are equipped with wind sensors on the main and luffing jib. If the wind speed measured on the crane’s boom during a job exceeds the set chart wind speed, the crane operator can simply switch to a load chart with a higher maximum wind speed which will often allow the job to be continued. For MK cranes, the values are 17 m/s with the boom raised and 20 m/s in a horizontal position. In telescopic boom mode, the charts even allow for a wind speed of 15.6 m/s.

For the LTM 1650-8.1, for example, it is 11.2 m/s and 13.4 m/s when using lattice equipment. To ensure that work can continue safely in even higher wind speeds, Liebherr has calculated the load charts for additional maximum wind speeds and programmed them in the crane control system. There is a load chart for this 200 Ton crane. The wind load calculated from this is 50 Newtons per square metre. Its entire operating range features outstanding load capacities which you can see in the load charts shown below.

This is the standard with which all our competitors also have to comply. The load charts for cranes generally apply to gust speeds of up to 9 m/s, or for a mobile construction crane of up to 14 m/s, measured at the top of the boom head with an area exposed to the wind (including cw value) on the load of 1.2 m² per tonne. MK88 and MK 140 on an industrial installation job.

80t liebherr crane load chart