A subsection of a tower section comprises a shell segment of the tower section and at least a longitudinal flange mounted to a longitudinal side of the shell segment for connecting to a longitudinal flange of a further subsection of the tower section. Here, the longitudinal flange comprises a part of a surface contour extending from a contact surface of the longitudinal flange which is provided for a connection to a longitudinal flange of a further subsection to a connecting surface connected to the shell segment. The part of the surface contour comprises a distance to a contacting plane passing through the contact surface.

Presented herein are systems, methods, and apparatus related to relocatable tower technologies that facilitate on-site deployment and provide improved stiffness in order to minimize motion at a tower top in a manner that existing approaches, which focus on survivability, do not contemplate. In particular, relocatable tower technologies described herein can be deployed rapidly and at low cost, at outdoor sites, to, e.g., provide a vertical mast upon which equipment can be mounted. In certain embodiments, features of relocatable towers described herein allow the vertical mast to survive and remain rigid while being exposed to outdoor elements, such as wind gusts (e.g., up to 110 Mph). Advantages of relocatable tower technologies described herein are particularly well suited where (e.g., scanning based) imaging and/or detection equipment is mounted at a top of the tower, and/or where towers are deployed at sensitive sites such as hydrocarbon production, storage and processing facilities.

The present disclosure relates to systems and methods for providing self-standing, self-supporting, rapid-deployable (S4RD) towers for communications and similar applications, and in particular to ballast base systems that enable the self-standing, self-supporting, rapid-deployable features while eliminating the need for a permanent foundation for the tower. Novel and inventive tower designs, wherein a user may climb through an interior volume of the tower while using the tower structure as both ladder and man cage, are also disclosed.

Provided is a coupling assembly of a wind turbine including a first coupling part and a second coupling part, the first coupling part and the second coupling part being configured to be coupled with each other, the first coupling part including a first surface with a first insertion hole being configured to be inserted by a fastener, the second coupling part including a second surface with a second insertion hole being configured to be inserted by the fastener, the first surface being configured to abut the second surface.

Methods and apparatuses for onshore or offshore erecting an upstanding construction comprising longitudinal construction parts, comprising the steps of providing the longitudinal construction parts, transporting the longitudinal construction parts on a vehicle to an erection site, providing a crane for hoisting the longitudinal construction parts, using the crane for placing the respective longitudinal construction parts on top of each other on a construction base at the erection site, providing the construction base and/or the longitudinal construction parts with a support and guide facility for the crane, arranging that the crane is mountable on the support and guide facility, and mounting the crane on the support and guide facility of at least one of the construction base and the longitudinal construction parts that is placed on the construction base, so as to arrange that the crane is movable up and down along the support and guide facility of the construction.

Provided is a coupling assembly of a wind turbine including a first coupling part and a second coupling part, the first coupling part and the second coupling part being configured to be coupled with each other, the first coupling part including a first surface with a first insertion hole being configured to be inserted by a fastener, the second coupling part including a second surface with a second insertion hole being configured to be inserted by the fastener, the first surface being configured to abut the second surface.

A foundation for a tower includes a plurality of ballast holders spaced from each other and a central portion configured to support a tower. The foundation includes a plurality of connecting members, each connecting member configured to attach a ballast holder to the central portion, wherein a length of the plurality of connecting members is determined based upon the load capacity required to retain the tower in a vertical position, wherein when the plurality of ballast holders is connected to the central portion, the central portion is elevated above the plurality of ballast holders, wherein different lengths of the connecting members expands and contracts the footprint of the foundation to match the foundation to the required maximum loading requirements.

A streamlined body, apparatus for suppressing vibrations of an enclosure, and a method for hoisting a tower are provided. The streamlined body surrounds the enclosure, and the streamlined body has a streamlined leading edge. The leading edge can faces towards the upwind incoming flow, to allow the upwind incoming flow to form a positive attack angle or a negative attack angle. In this solution, the enclosure is surrounded by the streamlined body, and when the upwind incoming flow flows around the enclosure to come into contact with the streamlined body, the aerodynamic configuration is changed, and the aerodynamic coefficient becomes small, thus the vibrations are reduced. Moreover, the direction and path of the airflow are changed, which disrupts the correlation of the upwind incoming flow near the streamlined body, and disrupts the consistence of frequencies of vortex shedding of the airflow at the streamlined body and other positions.

A tower structure of a wind turbine includes a plurality of tower sections stacked atop each other in an end-to-end configuration along a vertical axis to form the tower structure of the wind turbine at a wind turbine site. Each of the tower sections is formed of at least one first tubular portion and at least one second tubular portion. Further, the first and second tubular portions of each of the plurality of tower sections are concentric with each other. Moreover, the first tubular portion is formed at least in part, of a cementitious material and the second tubular portion is formed of a perforated material having a plurality of holes.

The system of the present invention is a tilt over mast that is easy to construct from the ground and permits azimuthal adjustments from the ground with the mast elevated to working heights. The system used for calibrating a directional antenna and includes two or more mast sections, namely a base member, a mid member, and a top member. The mid member may be pivotally coupled about the base member at a number of positions. The top member is coupled to an opposing end of the mid member and supports the desired equipment. A method of constructing and operating the system is described.