Lifting construction crane

The First crane appeared in 1830 in the UK. It was a steam option. A more perfect model, already hydraulic, was designed 17 years later. But if earlier, when there were the first cranes, the work was done by and large by manual force or partial mechanization, today every construction project, starting with small and ending large, has at its disposal a construction crane.

Some General information

You Must understand that a device such as a crane, does not exist. There are cranes. This term was given another Gosgortekhnadzor. The definition was similar to the following: lifting crane – a machine that has a lifting body (hook, grapple, etc.), which is used for lifting and moving heavy loads.

Today this technique is widely used in construction. In principle, from an economic point of view, it is quite beneficial. Modern crane can lift the cargo over 1,000 tons, but for the construction of a suitable model 50-ton crane.

Duty cycle

It Should be understood that to lift and move the load the operator needs to perform simple manipulations (cycles). The first stage is the seizure of the goods. If it is a concrete slab, it is tied off, and her lifting using the hook. If it is a granular material, the work is carried out grab. Second stage – stroke. He is to direct the movement and unloading of material moved. In fact, it is the most important stage, so the work must be performed smoothly and without jerks. Final stage – idle. It implies the return of the gripping device to its original position. By the way, the stroke consists of three steps: acceleration, steady motion and braking. The first and third stages are most important, as they appear dynamic load and consequently the risk of damage to floating cargo.

Construction crane and construction

By and large, the unit consists of several important nodes. Let's look at each of them:

• The Metal structure is the basis of a construction crane. All of that can be attributed here is the spans, supports, arrows, etc. it is Worth noting that they are box-like and lattice type. In the construction of the often used box of metal.
• Lift – lift consists of a flexible body. It can be rope or chain. This also should include lifting device (loop, grab, hook, etc.). In the construction of the lifting technique is most often used hook cranes.
• Lifting body – not automatic (hook or loop) that requires little manual works and automatic (solenoid or pneumatic suction Cup).

As you can see, construction crane – this is a fairly complex device that needs constant supervision and replacing of ropes, hooks and other parts.

A Classification of design and the ability to move

Immediately it is worth noting that there is no single classification that would reflect the full essence. The fact that modern cranes can combine several functions. So, there are the following cranes depending on the design:

• Jib – lifting body in this case is mounted on the boom. These are the valves most often used in construction, as their agility and mobility allows you to perform all the work quickly enough.
• Bridges – the metal structure is a bridge, which is suspended on hoisting.
• Taps cable type.

As for the movement, it makes sense to speak only about the two main types: stationary and self-climbing. Recent form just applied for the construction of buildings. Its peculiarity is that it is installed on the object under construction. The growth of the building of the crane rises with the help of special mechanisms. Although in recent years increasingly used mobile jib cranes, which are largely technical characteristics in the lead. This crane is fitted optionally, and can easily be moved to another facility. Now we go on.

Construction cranes

Tower Cranes type are the most rational for civil and industrial construction. This is because they allow Assembly, disassembly and transport of the forcesvehicles. This allows to reduce production costs by speeding up work. But sometimes this valve use not go by the limited amount of space. In this case, a fast-tower crane. The lift construction of this type is good because don't need much space to install it. However, such a lifting device cannot be used when the height of the building above 30 meters. It is interesting that during one shift, the crane can be dismantled and assembled at a different construction site with minimal operating costs. Today it is one of the most effective solutions after the cranes.

Rubber-tired and crawler crane

The Version running on rubber-tired chassis is nice in that it has a high cross. In principle, this construction crane photo which you can see being used in close proximity to the object. This was achieved through the installation of several controlled axes. In addition, the operator cabin is quite comfortable. There is a computer which virtually eliminates the human factor, the conditioning, etc. of the system.

There is also a crawler crane. It is installed on the crawler. Despite the high maneuverability, this equipment is able to operate only on pre-prepared sites. Transported with a special trailer, which increases operating costs. It is therefore not everywhere use such construction equipment. Cranes of this type is used only where any other is not suitable.

Conclusion

So we figured out with you, what is the construction crane. Photos of several popular models you can find in this article. I would like to note that today this lifting technique is used everywhere. It allows you to reduce the risk of injuries during production and reduce the amount of manual work. There are a large number of taps, this applies to both their types and capacity. One is designed to be fast and mobile moving to another object, while others, on the contrary, raise slowly, but quite heavy loads, and stand on objects for weeks and even months.