The present disclosure concerns a crane, in particular a tower crane, with a jib from which a load hook can be raised and lowered via a hoisting cable, and with an electric power supply to the load hook and/or to a trolley that may be movable along the crane jib. According to the disclosure, the electric power supply to the load hook and/or to the trolley is at least partly conducted by a running cable which transmits tractive forces for the crane operation.

Disclosed is a base assembly for supporting a crane pedestal. The base assembly comprises four base units, each having a first end and a second end, and each base unit being of an L-shape with an outside beveled corner. Fastening devices connect each base unit at their first and second end to respective first and second ends of another of the four base units. The four base units are dimensioned so that, when connected by said fastening devices, they form an octagonal-shaped base structure. The four base units are also dimensioned to support four pads that each rest on a face of 14each unit adjacent to its beveled corner when the four base units are assembled in the octagonal-shaped base structure. Also disclosed is a method for assembling a base assembly for supporting a crane pedestal and a fastening device for connecting the ends of two units together.

This invention relates generally to a method for making a deck for use in construction. In one embodiment, the method includes, but is not limited to, positioning a first box tube substantially parallel to a second box tube; attaching a plate to the first box tube and the second box tube, the plate extending between the first box tube and the second box tube; coupling a hydraulic cylinder to the plate; slidably inserting a first extension member at least partially into the first box tube; slidably inserting a second extension member at least partially into the second box tube, the first and second extension members having a beam extending therebetween; coupling the hydraulic cylinder to the beam; positioning a platform having one or more wheels on the plate and over the hydraulic cylinder such that the platform is rollable relative to the plate; attaching the platform to the beam such that the platform is operable to retractably extend beyond an edge of a floor of a building in conjunction with the first and second extension members in response to actuation of the at least one hydraulic cylinder; and forming a rectangular cuboid basket comprised of six faces with a connecting mechanism on a top face.

This invention relates generally to a method for making a deck for use in construction. In one embodiment, the method includes, but is not limited to, positioning a first box tube substantially parallel to a second box tube; attaching a plate to the first box tube and the second box tube, the plate extending between the first box tube and the second box tube; coupling a hydraulic cylinder to the plate; slidably inserting a first extension member at least partially into the first box tube; slidably inserting a second extension member at least partially into the second box tube, the first and second extension members having a beam extending therebetween; coupling the hydraulic cylinder to the beam; positioning a platform having one or more wheels on the plate and over the hydraulic cylinder such that the platform is rollable relative to the plate; attaching the platform to the beam such that the platform is operable to retractably extend beyond an edge of a floor of a building in conjunction with the first and second extension members in response to actuation of the at least one hydraulic cylinder; and forming a rectangular cuboid basket comprised of six faces with a connecting mechanism on a top face.

A method for building a bridge, said bridge comprising piers and at least one deck. The method including a cantilever step, wherein a girder is set in a cantilevered position relative to a bank or to a constructed zone of the bridge so that the girder comprises a first end overhanging the bank or the constructed zone, and a second end overhanging a construction zone of the bridge, and a construction step, wherein pier elements and deck elements are installed in said construction zone via a first and a second lifting devices mounted movable on the girder between the first and second ends. The first and second lifting devices cross one another along the girder during the cantilever step and/or during the construction step.

A method for building a bridge, said bridge comprising piers and at least one deck. The method including a cantilever step, wherein a girder is set in a cantilevered position relative to a bank or to a constructed zone of the bridge so that the girder comprises a first end overhanging the bank or the constructed zone, and a second end overhanging a construction zone of the bridge, and a construction step, wherein pier elements and deck elements are installed in said construction zone via a first and a second lifting devices mounted movable on the girder between the first and second ends. The first and second lifting devices cross one another along the girder during the cantilever step and/or during the construction step.

Disclosed is a base assembly for supporting a crane pedestal. The base assembly comprises four base units, each having a first end and a second end, and each base unit being of an L-shape with an outside beveled corner. Fastening devices connect each base unit at their first and second end to respective first and second ends of another of the four base units. The four base units are dimensioned so that, when connected by said fastening devices, they form an octagonal-shaped base structure. The four base units are also dimensioned to support four pads that each rest on a face of 14 each unit adjacent to its beveled corner when the four base units are assembled in the octagonal-shaped base structure. Also disclosed is a method for assembling a base assembly for supporting a crane pedestal and a fastening device for connecting the ends of two units together.

Crane-support apparatus for mounting a tower crane onto a side of a high-rise building under construction, enabling ascending of the tower crane according to the upwards progression of the building construction, including a chassis configured to support a climbing frame of the tower crane mast, and at least one reinforcement element. A distal end of the chassis is hingedly attached to the distal end of the reinforcement element. In a deployed, support mode, the chassis is aligned in a horizontal position, and the reinforcement element is aligned in a slanted position. In a folded, mobilization mode, the chassis and the reinforcement element are configured to be pulled by at least one lifting cable at the distal end of the chassis and the reinforcement element with the chassis and the reinforcement element hingedly folded and aligned in vertical positions. A method for using the apparatus in both modes is also provided.

A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.

A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.