The disclosure relates to a crane (200) for erecting a tower including a plurality of tower segments (171, 72, 173, 174, 175), the crane (200) comprising: a telescopic mast (210), and a jib (230) rotatably mounted with respect to the telescopic mast (210) and comprising lifting equipment (240). The telescopic mast (210) comprises a lower mast segment (211) having one or more lower clamp assemblies (202, 204) for selectively gripping portions of the tower and a roller assembly (300) for rolling along the tower, and comprising one or more further mast segments (212, 213, 214, 215, 216) having an upper clamp assembly (206) for selectively gripping portions of the tower, the further mast segments (212, 213, 214, 215, 216) being slidable with respect to the lower mast segment (211). The disclosure also relates to methods for climbing a tower with a crane (200) and methods for mounting a wind turbine tower.

A crane assembly is configured to move a camera. The crane assembly has a base support assembly which includes a box support, joined to at least three box leg sleeves extending outward and downward from the box support. A plurality of legs where each leg is joined to one of the box leg sleeves. A plurality of drop in leg forks where each drop in leg fork joined is to at least one of the legs. A plurality of spreader bars where each spreader bar is joined to two of the drop in leg forks.

A crane assembly is configured to move a camera. The crane assembly has a base support assembly which includes a box support, joined to at least three box leg sleeves extending outward and downward from the box support. A plurality of legs where each leg is joined to one of the box leg sleeves. A plurality of drop in leg forks where each drop in leg fork joined is to at least one of the legs. A plurality of spreader bars where each spreader bar is joined to two of the drop in leg forks.

A lift machine includes a machine chassis, a boom extending from the machine chassis, and a connector extending from the boom for coupling to a load. The machine further includes a control system that determines a lift capacity of the machine based on a skew of the connector caused by the load.

A lift machine includes a machine chassis, a boom extending from the machine chassis, and a connector extending from the boom for coupling to a load. The machine further includes a control system that determines a lift capacity of the machine based on a skew of the connector caused by the load.

A stability frame for the installation of a wind turbine on an offshore substructure, wherein the wind turbine comprises a tower configured to be anchored to a rigging assembly below the barycenter of the wind turbine, has a main body configured to be mounted about the upper part of the tower; and a plurality of guides, which extend outwardly from the main body and are configured for constraining parts of the rigging assembly so as to laterally support the wind turbine by the rigging assembly.

The offshore jack-up has a hull and a plurality of moveable legs engageable with the seafloor. The offshore jack-up is arranged to move the legs with respect to the hull to position the hull out of the water. The method comprises securing the vessel with respect to the hull of the offshore jack-up when the hull is positioned out of the water and the legs engage the seafloor. A lifting mechanism mounted on the offshore jack-up engages with a cargo carrying platform positioned on the vessel. The platform is lifted with the lifting mechanism between a first position on the vessel and a second position clear of the vessel.

A counterbalanced vertical track assembly which may be configured with three types of pulley support assemblies are herein disclosed. The first type of pulley support assembly has a pair of opposed pulley modules having an elongate structural element interposed the two pulley modules which are attached to end plates at both ends of the elongate structural element. The second type of pulley support assembly has a pair of opposed pulley modules which include male end connectors for demountable engagement of the pulley modules with another module of the system with female ends. The third type of pulley support assembly has a pair of opposed pulley modules wherein the modules' pulley brackets are repositionable to varying angular orientations by alternating screw mount positions selected on mount components at opposite ends of an elongate structural element.

Tower erecting systems and methods are disclosed. An example method for erecting a tower includes: nesting frusto-conical tower sections within one another and within a frusto-conical tower base; securing the frusto-conical tower base to a tower foundation; lifting each frusto-conical tower section from within the frusto-conical tower base with a lifting apparatus; and securing each frusto-conical tower section to the frusto-conical tower base or to a previously lifted frusto-conical tower section.

The invention relates to a method in a weighing system, in which method the mass of the bundle is weighed and recorded during both loading % and unloading m.sub.i_p of the bundle, during loading, the total loading mass m.sub.K_kok_j is calculated from the mass m.sub.i_c of one or more bundles weighed during loading and corrected using a correction factor C.sub.j, the total unloading mass m.sub.p_kok_j is calculated from the mass m.sub.i_p of one or more bundles weighed during unloading, with the aid of the said total loading mass m.sub.K_COk_j and total unloading mass m.sub.p_kok_j, a new corrected value Cj+1 is calculated for the correction factor C.sub.j in order to adjust the weighing for the loading of the next load K.sub.j+1. The invention also relates to a corresponding software product, an arrangement, and a material-handling machine.