Antenna tower construction/deconstruction biasing assemblies are provided. The biasing assemblies can be configured to extend between a standard and an antenna tower. The assemblies can include: an adjustable linear extension extending between a first end configured to couple with the standard and a second end configured to couple with the antenna tower; and a biasing mechanism configured to adjust the length of the linear extension and maintain the rigid engagement during transitioning of the tower from a down/erect position to an erect/down position. Methods for constructing/deconstructing an antenna tower are provided. The methods can include providing a biasing assembly.

A structure, in particular, a wind turbine tower (1), which is pre-tensioned with at least one tensioning element (3), has a foundation (2), a concrete tower section (4), in particular, consisting of a plurality of precast concrete elements (5), as well as a head piece (6), wherein the tensioning element (3) at least at one of its ends has a tendon anchor (7, 7a, 7b). The tendon anchor (7, 7a, 7b) has an accommodation (8) in which a first end (10a) of an anchor rod (9) is fastened, in particular screwed in. A second end (10b) of the anchor rod (9) is anchored to the foundation (2) or to the head piece (6). In a corresponding method for manufacturing a structure, a first end (10a) of an anchor rod (9) is fastened, in particular screwed in an accommodation (8) of a tendon anchor (7, 7a, 7b), and a second end (10b) of the anchor rod (9) is anchored to the foundation (2) or to the head piece (6).

Disclosed are a load dispersion-type indoor lifting apparatus for a prefabricated steel structure, and a method of installing a prefabricated steel structure by using the same. The load dispersion-type indoor lifting apparatus for a prefabricated steel structure disclosed herein includes a moving cart, a support frame configured to be mounted on the moving cart, a lifting frame configured to be mounted on the support frame, and a plurality of stacker systems configured to lift up the lifting frame while pushing the support frame down.

The present invention provides a tower section for a wind turbine which includes at least two tower elements stacked and arranged edge-to-edge at a joining plane, each tower element includes at least two wall segments, connected to one another by first connectors. The tower section further includes second connectors each extending astride the two adjacent tower elements along the longitudinal direction. Each second connector extends in the longitudinal extension of a first connector and has a width increasing, from the first connector, from a first width substantially equal to the width of the first connector to a second width strictly larger than the first width, the second width being reached before the joining plane starting from the first connector.

The present invention relates to a hollow boring auger for use for poles, including a first and second mounting part moveably connected, one to the other, to substantially encircle the pole. A first and second auger part are also included, correspondingly attachable to the first and second mounting part, to substantially encircle the pole, A rotation apparatus associated with the mounting parts and the auger parts is included such that in use the auger parts can be rotated about the pole to bore a hollow trench about the pole. The invention also relates to a method of use.

The present invention relates to a hollow boring auger for use for poles, including a first and second mounting part moveably connected, one to the other, to substantially encircle the pole. A first and second auger part are also included, correspondingly attachable to the first and second mounting part, to substantially encircle the pole, A rotation apparatus associated with the mounting parts and the auger parts is included such that in use the auger parts can be rotated about the pole to bore a hollow trench about the pole. The invention also relates to a method of use.

The drilling rig includes a first substructure and a second substructure. The second substructure is positioned generally parallel to and spaced apart from the first substructure and generally the same height as the first substructure. The drilling rig further includes a drill floor coupled to the first and second substructures, where the drill floor positioned substantially at the top of the first and second substructures.

This invention relates to lattice tower for actuate under high load conditions, more particularly to lattice towers utilized for wind turbines and other applications comprising three metallic legs arranged in a triangular configuration around a vertical axis of the lattice tower, wherein each metallic leg has a closed cross-section profile, a distance between the center of metallic legs in a bottom portion of the tower is greater than 4 meters, an angle of inclination of a central longitudinal axis of each metallic leg in relation to the vertical axis of the tower is between 1.7 degree and +1.7 degrees, and the height of the lattice tower is greater than 60 meters, a plurality of bracing members and auxiliary bracing members and a support platform disposed at a top portion of the tower.

Precast segment for wind turbine tower especially designed to be used in wind turbine towers installed in cold climates, and which comprises joint flanges showing a configuration intended to establish the boundaries for forming the joints between said precast segment and an adjacent precast segment and which comprises conduits provided with an inlet and an outlet, situated in the proximity of the joint flanges of the precast segment intended to house some heating cables that generate heat. The method comprises the use of the described precast segment and the stages of introducing heating cables in the conduits of the precast segment, applying current to said cables and removing the cables when a filler material used in the joint between precast segments has set.

Precast segment for wind turbine tower especially designed to be used in wind turbine towers installed in cold climates, and which comprises joint flanges showing a configuration intended to establish the boundaries for forming the joints between said precast segment and an adjacent precast segment and which comprises conduits provided with an inlet and an outlet, situated in the proximity of the joint flanges of the precast segment intended to house some heating cables that generate heat. The method comprises the use of the described precast segment and the stages of introducing heating cables in the conduits of the precast segment, applying current to said cables and removing the cables when a filler material used in the joint between precast segments has set.