While looking at the tower crane, possible to imagine what they are capable of: must fall! How can lift all the heavy stuff? How to get the following high buildings in height? We are happy to present in this article describtion tower construction cranes and their technical characteristics.
A tower crane can lift a maximum load of 18 metric tons (£ 39,690), but not if the load is at the end of the jib. The closer the burden is on the pole, the more weight the crane can lift safely. This relationship is described in the ranking of 300 tones meters. For example, if the load is placed at 30 meters (100 feet) from the mast, the crane will lift a maximum of 10.1 tons.
Two limit switches are used on cranes to ensure that it is not overloaded by the operator:
Pull on the cable to be monitored by the maximum load switch is made to ensure that the load is not more than 18 tonnes.
As the load on the jib moves, the switch prevents the load current from exceeding the rating tone operator meters from the crane. The slewing unit is no cat head assembly that can measure the amount of collapse of the jib and the current overloading.
And it would be a disaster if something falls over on a job site. So, what makes big machines upside down?
The key element for a stable tower crane is a large concrete pad. It is poured by the construction company a few weeks before the arrival of the crane. Its size is 30 feet by 30 feet by 4 feet (10 x 10 x 1.3 meters) and the weight is 400,000 pounds (182,000 kg). Large anchor bolts screwed deep into the pad to support the crane base:
So, to ensure their stability, tower cranes which sped to the base.
Tower crane delivered to the building by 10 to 12 tractor-trailer rig. The pole was founded on a solid foundation. Pole remained upright because triangulated structure.
As the building is finished, the crane disassembles its own pole and then the rest is dismantled by a smaller crane.