A method of assembling a drilling rig may include aligning a trailer with a drilling rig support structure, the trailer carrying a mast and the drilling rig support structure including a step-down substructure. A first end of the mast may be positioned over the drilling rig support structure and arms may be extended from the mast to the drilling rig support structure so that the drilling rig support structure supports the first end of the mast. The mast may translate along a length of the drilling rig support structure. The mast may be coupled to the drilling rig support structure.

System and method for monitoring the condition of electricity conductor support systems, i.e. towers, in a power network distribution system employing a tower structure integrity sensor assemblage. The system allows for identifying particular portions of a structural system for maintenance attention. The tower sensors allow identification of structural failures of electricity transmission towers.

Disclosed is a power transmission tower having elevatable trusses. The power transmission tower has a tower head, a tower body, and a tower leg. The power transmission tower comprises a truss set symmetrically arranged at both sides of the tower body and an elevating device which is capable of driving the displacement of the truss set. The elevating device comprises a power unit arranged within the tower body, and a linear slide module secured to side of the tower body. The linear slide module is connected to the power unit and the truss set, respectively.

Disclosed is a power transmission tower having elevatable trusses. The power transmission tower has a tower head, a tower body, and a tower leg. The power transmission tower comprises a truss set symmetrically arranged at both sides of the tower body and an elevating device which is capable of driving the displacement of the truss set. The elevating device comprises a power unit arranged within the tower body, and a linear slide module secured to side of the tower body. The linear slide module is connected to the power unit and the truss set, respectively.

A building system comprising a plurality of tubes, a plurality of connection nodes comprising tubular sections for connection to the tubes, wherein the tubes are arranged to connect between the connection nodes to form a frame for a building, wherein at least one continuous cavity is formed through at least a portion of the nodes and tubes when the nodes and tubes are connected, the building system further comprising fluid tight seals between the tubes and connection nodes to enable fluid to flow through the at least one continuous cavity.

The present disclosure is directed to a tower assembly for a wind turbine. The tower assembly includes a lattice tower portion, a tubular tower portion, and a transition region therebetween. The lattice tower portion includes a plurality of structural members connected together to define an open lattice tower. Further, the structural members include a plurality of supports and a plurality of cross-support members. The cross-support members are connected between the supports so as to define one or more openings. The tubular tower portion includes a lower portion and an upper portion. The first transition region includes a single-piece connection structure, a plurality of arm members, and a plurality of node connectors. The connection structure has a circumferential body configured to receive the lower portion of the tubular tower portion therein. Further, the node connectors join the plurality of supports of the lattice tower portion to the connection structure via the plurality of arm members.

The present disclosure is directed to a tower assembly for a wind turbine. The tower assembly includes a lattice tower portion, a tubular tower portion, and a transition region therebetween. The lattice tower portion includes a plurality of structural members connected together to define an open lattice tower. Further, the structural members include a plurality of supports and a plurality of cross-support members. The cross-support members are connected between the supports so as to define one or more openings. The tubular tower portion includes a lower portion and an upper portion. The first transition region includes a single-piece connection structure, a plurality of arm members, and a plurality of node connectors. The connection structure has a circumferential body configured to receive the lower portion of the tubular tower portion therein. Further, the node connectors join the plurality of supports of the lattice tower portion to the connection structure via the plurality of arm members.

A node structure (12, 14) for connecting two or more convergent members (16, 26) of a lattice frame to each other and to one or more other members of the lattice frame. The node structure (12, 14) comprises a pair of opposed spaced-apart faces (30) that are substantially planar and substantially parallel to each other. At least one pair of root formations (32) with respective central longitudinal axes define an interior angle between them, those axes diverging outwardly for alignment with respective members of the lattice frame and converging inwardly between the faces (30). An inner connecting wall (34) between the root formations (32) of the pair connects concave-curved inner edges (36) of the faces and extends in a concave curve around the interior angle to join the root formations (32) of that pair.

A node structure (12, 14) for connecting two or more convergent members (16, 26) of a lattice frame to each other and to one or more other members of the lattice frame. The node structure (12, 14) comprises a pair of opposed spaced-apart faces (30) that are substantially planar and substantially parallel to each other. At least one pair of root formations (32) with respective central longitudinal axes define an interior angle between them, those axes diverging outwardly for alignment with respective members of the lattice frame and converging inwardly between the faces (30). An inner connecting wall (34) between the root formations (32) of the pair connects concave-curved inner edges (36) of the faces and extends in a concave curve around the interior angle to join the root formations (32) of that pair.

A device for strengthening and/or rigging trusses includes at least two connecting elements, which connect at least two parallel truss pipes of the truss. On these connecting elements an attachment unit provided between at least one pair of truss pipes, to which mounting structures can be attached.