A hoisting crane that comprises a male shaft, a female shaft, a locking shaft, a tightening spring, a hoisting arm, a pressure arm, a top shoe, a bottom shoe, a top bearing, and a bottom bearing. The crane is portable and collapsible and is equipped with an automatic adjusting tightening mechanism that fixes and secures the crane to the work room floor and ceiling using a spring and in a way that the greater the load on the crane, the more the pressure arm increases the tightening force that the crane applies to the work room floor and ceiling.

A hoisting crane that comprises a male shaft, a female shaft, a locking shaft, a tightening spring, a hoisting arm, a pressure arm, a top shoe, a bottom shoe, a top bearing, and a bottom bearing. The crane is portable and collapsible and is equipped with an automatic adjusting tightening mechanism that fixes and secures the crane to the work room floor and ceiling using a spring and in a way that the greater the load on the crane, the more the pressure arm increases the tightening force that the crane applies to the work room floor and ceiling.

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

The solution relates to a unique concept and an efficient construction method and device to enable faster construction by, inter alia, avoiding as much unnecessary work as possible, speeding up the assembly time of building structures and building materials and minimizing dismantling of, inter alia, hoisting cranes or as much as possible. Avoid temporary building constructions such as construction lift systems and a lifting shed. Methods and devices for building a structure such as relatively high, multi-story buildings include building the structure using construction aids which are at least partly adapted to act as functional part of the structure to be and remain permanently incorporated into the structure. A tower and/or hoisting machine of a construction crane or construction lift can be used as a permanent part of the construction, such as part of a lift installation, after the construction phase of the construction work.

The solution relates to a unique concept and an efficient construction method and device to enable faster construction by, inter alia, avoiding as much unnecessary work as possible, speeding up the assembly time of building structures and building materials and minimizing dismantling of, inter alia, hoisting cranes or as much as possible. Avoid temporary building constructions such as construction lift systems and a lifting shed. Methods and devices for building a structure such as relatively high, multi-story buildings include building the structure using construction aids which are at least partly adapted to act as functional part of the structure to be and remain permanently incorporated into the structure. A tower and/or hoisting machine of a construction crane or construction lift can be used as a permanent part of the construction, such as part of a lift installation, after the construction phase of the construction work.

A portable lifting crane that can be easily detached from a point of application for transport or storage and allows loads to be lifted to a considerable height. The portable lifting crane comprises a base, a roller and at least one diverter pulley of a lifting cable that lifts from the roller. The base is constructed and arranged to support a vertical mast, to which a side arm is coupled, the side arm may terminate in a diverter pulley. The arm may be horizontally oriented with respect to the base, characterized in that the base comprises a series of collapsible legs along an articulation with a vertical axis.

A portable lifting crane that can be easily detached from a point of application for transport or storage and allows loads to be lifted to a considerable height. The portable lifting crane comprises a base, a roller and at least one diverter pulley of a lifting cable that lifts from the roller. The base is constructed and arranged to support a vertical mast, to which a side arm is coupled, the side arm may terminate in a diverter pulley. The arm may be horizontally oriented with respect to the base, characterized in that the base comprises a series of collapsible legs along an articulation with a vertical axis.