Tower crane is a type of crane "Crane (machine)") with a removable metal structure powered by electric current specially designed to work as a tool in construction.[1]​.

It arose as a need to obtain translational, telescopic or mainly round epsilon movements, it was created and patented in 1932, by Carlos Daniel Cardona"), who upon observing that no crane had the option of performing round epsilon movements, devised a way to be able to perform this movement and thus give a paradigm shift to the cranes that had been handled in a single way. Additionally, while performing this movement, he was able to observe how easy it was for the crane to perform the movements of translation and telescopic.[2]​.

Due to their mobility they are classified as:

By his pen:

These stresses originate from the more or less abrupt lifting and accelerations of the lifting movement, as well as the vertical actions due to rolling. These requests are covered by multiplying the service load by a factor called dynamic coefficient (φ) which is calculated with the following expression:.

φ = 1 + ε VL.

Being:

VL the lifting speed in m/s, taking 1 m/s as the maximum lifting speed value.

• the experimental coefficient, the result of a multitude of measurements carried out in different types of devices.

For jib cranes ε = 0.3.

Therefore: SL = φ S´L.

Since φ considers the more or less abrupt lifting of the load that constitutes the most important shock, we can neglect the stresses due to the accelerations of the lifting movement and the vertical actions due to rolling.

1. Loads due to translational movement: These loads are caused by the translational movement that the entire crane can have as a whole from its base. This type of load is assumed to be a horizontal force applied to the crane crosshead, which is approximately the C.D.G. We can quantify this load value by:.

Where:.

a is the acceleration in m/s2 and its value depends on the degree of speed selected for use.

Q is the total load on the driving wheels in tons.

Contenido

En España, se regula por la Directiva de Máquinas"), Directiva 98/37/CE.[4]​[3]​.

Spain

They are regulated by Royal Decree 836/2003, Regulation of lifting and handling devices, referring to tower cranes for construction sites or other applications.[5]​ The deposit that must be given to town councils to cover subsequent disassembly is not yet regulated.[6]​.