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 invention relates to a concrete pump, comprising: —a frame; —a supporting leg, the supporting leg having a supporting foot, the supporting foot being extensible relative to the supporting leg; and—a drive for driving a movement of the supporting leg relative to the frame. A camera image of a hazard zone around the supporting leg is produced by a monitoring sensor. The drive is controlled by means of a remote control. The data information is transferred to the remote control via an interface. The invention also relates to a method for supporting a concrete pump. On the basis of the received data information, it can be determined, by means of the remote control, whether the movement of the supporting leg causes a hazard.

A crane fall protection system is disclosed herein for use within building or construction sites. The system may comprise a safety net and an adjustable scaffold structural member. The adjustable scaffold structural member may be provided as a deployable arm that extends from the side of a crane. In some embodiments, the system may include an access flap that enables an operator to access a ladder of the crane without removing the safety net. In some embodiments, one or more tension wires may extend from the safety net and/or the scaffold structural member and attach to a pad positioned underneath an outrigger of the vehicle to provide additional support for the safety net. In some embodiments, air inflatable units may be used instead of a safety net. In some embodiments, connections to outriggers may be used to suspend the safety net instead of a scaffold structural member.

A crane fall protection system is disclosed herein for use within building or construction sites. The system may comprise a safety net and an adjustable scaffold structural member. The adjustable scaffold structural member may be provided as a deployable arm that extends from the side of a crane. In some embodiments, the system may include an access flap that enables an operator to access a ladder of the crane without removing the safety net. In some embodiments, one or more tension wires may extend from the safety net and/or the scaffold structural member and attach to a pad positioned underneath an outrigger of the vehicle to provide additional support for the safety net. In some embodiments, air inflatable units may be used instead of a safety net. In some embodiments, connections to outriggers may be used to suspend the safety net instead of a scaffold structural member.

A method for automatic control of a crane having a boom operating in a working circular area and at least one collision avoidance system detecting a risk of collision on a right side and a left side of the boom. The automatic control method, during a boom automatic and autonomous orientation step, serves to orient the boom according to an orientation direction, which is opposite to the side of the boom for which the risk of collision is detected, from a starting angular position, where the risk of collision with an obstacle has been detected, up to a first angular position for which the risk of collision is no longer detected, without the crane having need to communicate with an external system.

A method for automatic control of a crane having a boom operating in a working circular area and at least one collision avoidance system detecting a risk of collision on a right side and a left side of the boom. The automatic control method, during a boom automatic and autonomous orientation step, serves to orient the boom according to an orientation direction, which is opposite to the side of the boom for which the risk of collision is detected, from a starting angular position, where the risk of collision with an obstacle has been detected, up to a first angular position for which the risk of collision is no longer detected, without the crane having need to communicate with an external system.

A method for controlling a crane having a boom operating in a circular work area and at least one anti-collision system detecting a risk of collision on a right side and a left side of the boom may be used to direct the boom from a starting angular sector, where a risk of collision with an obstacle has been detected, towards a final angular sector where a risk of interference is low or even zero, based on an interference mapping segmenting the circular work area into several angular sectors and associating with each of them an interference counter value representative of a level of risk of interference. The values may evolve in real time according to the orientations of the boom and collision risk detections.

A method for controlling a crane having a boom operating in a circular work area and at least one anti-collision system detecting a risk of collision on a right side and a left side of the boom may be used to direct the boom from a starting angular sector, where a risk of collision with an obstacle has been detected, towards a final angular sector where a risk of interference is low or even zero, based on an interference mapping segmenting the circular work area into several angular sectors and associating with each of them an interference counter value representative of a level of risk of interference. The values may evolve in real time according to the orientations of the boom and collision risk detections.

Provided is a construction machine including a hydraulic system having a hydraulic pump, and a first hydraulic actuator and a second hydraulic actuator which are driven by hydraulic oil supplied from the hydraulic pump. The construction machine includes a first flow rate detector that detects a flow rate of drain hydraulic oil discharged from the first hydraulic actuator, a second flow rate detector that detects a flow rate of drain hydraulic oil discharged from the second hydraulic actuator, and an abnormality determination unit that determines abnormality of the first hydraulic actuator, based on a detection signal from the first flow rate detector, and determines abnormality of the second hydraulic actuator, based on a detection signal from the second flow rate detector. The first flow rate detector and the second flow rate detector each have a moving body.