A crane, such as a bridge crane or gantry crane, having at least one horizontally extending crane girder, which is designed as a lattice girder having a plurality of braces and on which a crane trolley having a lifting device can be moved. At least some of the braces are planiform, and each of the planiform braces has a flat main surface, which extends transversely to a longitudinal direction of the crane girder. On each longitudinal side of the braces, a first cut-out and a second cut-out are provided in the main surfaces. The longitudinal sides of at least some of the planiform braces are free of edge bends at least between the first and second cutouts.

A trolley includes a housing, at least one sheave rotatably mounted at least partially within the housing, and a braking mechanism. The braking mechanism includes a rotor assembly coupled to the at least one sheave, at least one conductive element, and at least one magnetic element. The rotor assembly is rotatable with the at least one sheave, and when the rotor assembly rotates, the at least one conductive element overlaps with the at least one magnetic element based at least in part on a rotational speed of the rotor assembly.

An overhead crane has first and second runway rails that extend parallel to a generally horizontal runway axis and a bridge that extends along a bridge axis that is generally horizontal and perpendicular to the runway axis and that is movable on the runway rails along the runway axis. The bridge includes a first bridge reinforcement member pre-loaded under tension to provide an upward deflection of the bridge rail. The first bridge reinforcement member may have at least two upwardly extending struts and a common upper end where the at least two struts meet, the at least two struts having lower ends mechanically connected to the bridge rail at positions longitudinally spaced apart with respect to the bridge axis. The lower ends of the at least two struts are longitudinally translatable along the bridge rail to adjust the tension on the first bridge reinforcement member to thereby adjust the extent of upward deflection of the bridge rail. The bridge further includes a pair of second bridge reinforcement members extending between the upper end of the first bridge reinforcement member and mechanically connected to the bridge rail proximate the first and second outer ends, the second bridge reinforcement members loaded in compression. The runway rails may be constructed in a similar manner as the bridge rail.

A crane, such as a bridge crane or gantry crane, having at least one horizontally extending crane girder, which is designed as a lattice girder having a plurality of braces and on which a crane trolley having a lifting device can be moved. At least some of the braces are planiform, and each of the planiform braces has a flat main surface, which extends transversely to a longitudinal direction of the crane girder. On each longitudinal side of the braces, a first cut-out and a second cut-out are provided in the main surfaces. The longitudinal sides of at least some of the planiform braces are free of edge bends at least between the first and second cutouts.

A crane, such as a bridge crane or gantry crane, having at least one horizontally extending crane girder, which is designed as a lattice girder having a plurality of braces and on which a crane trolley having a lifting device can be moved. At least some of the braces are planiform, and each of the planiform braces has a flat main surface, which extends transversely to a longitudinal direction of the crane girder. On each longitudinal side of the braces, a first cut-out and a second cut-out are provided in the main surfaces. The longitudinal sides of at least some of the planiform braces are free of edge bends at least between the first and second cutouts.

Systems for position determination using an energy chain for guiding supply lines, which energy chain has a movable run which is fixed at an end to a driver and a stationary run wherein the driver moves back and forth along a track. The system has a sensor device for position determination, which is attached to the driver. In one variant, the system comprises guide components, arranged along the track, for lateral guidance of the energy chain of which components at least one has a reference component acting as a position reference. In another variant of the system, at least each nth chain link of the energy chain has at least one reference component attached thereto. In both variants, the sensor device for position determination interacts with individual reference components, which allows better and more reliable determination of the current position.

Systems for position determination using an energy chain for guiding supply lines, which energy chain has a movable run which is fixed at an end to a driver and a stationary run wherein the driver moves back and forth along a track. The system has a sensor device for position determination, which is attached to the driver. In one variant, the system comprises guide components, arranged along the track, for lateral guidance of the energy chain of which components at least one has a reference component acting as a position reference. In another variant of the system, at least each nth chain link of the energy chain has at least one reference component attached thereto. In both variants, the sensor device for position determination interacts with individual reference components, which allows better and more reliable determination of the current position.

The present disclosure generally relates to marine rig equipment, and specifically to a mobile jackup rig having one or more moveable cranes. The one or more moveable cranes are configured to operate along a rail, and the one or more moveable cranes are positioned to reach more than one work site location. In one embodiment, a mobile jackup rig includes at least one two-rail system having a first guide-track rail and a second guide-track rail, and at least one moveable crane positioned to operate along the two-rail system. In another aspect, a mobile jackup rig may include at least one moveable pedestal crane positioned on at least one curved or straight guide-track rail system.

The present disclosure generally relates to marine rig equipment, and specifically to a mobile jackup rig having one or more moveable cranes. The one or more moveable cranes are configured to operate along a rail, and the one or more moveable cranes are positioned to reach more than one work site location. In one embodiment, a mobile jackup rig includes at least one two-rail system having a first guide-track rail and a second guide-track rail, and at least one moveable crane positioned to operate along the two-rail system. In another aspect, a mobile jackup rig may include at least one moveable pedestal crane positioned on at least one curved or straight guide-track rail system.

Provided is a transport vehicle system that includes an inspection vehicle that is controlled by a ground controller in the same manner as other transport vehicles, and coexists with the other transport vehicles. The transport vehicle system includes the inspection vehicle that has common rules for avoiding collision and speed regulation and a common pattern for acceleration and deceleration with the other transport vehicles. The inspection vehicle is configured to measure inspection data of the travelling route while travelling along the travelling route.