A mobile tower for transportation to and rapid deployment at remote sites where the mobile tower can be engaged with the ground, the mobile tower including an extendable and retractable tower secured to a mobile support structure including a frame having a plurality of rapidly deployable outriggers, wherein the tower includes three series of pivotally interconnected tower sections or segments, sections or segments of which engage with segments of each of the other series when the tower is assembled; the mobile tower including a plurality of guy wires secured between the extendable and retractable tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the extendable and retractable tower at first and second connecting positions that are displaced from one another about an outer perimeter. Methods of deploying the mobile tower are also disclosed.

A mobile tower for transportation to and rapid deployment at remote sites where the mobile tower can be engaged with the ground, the mobile tower including an extendable and retractable tower secured to a mobile support structure including a frame having a plurality of rapidly deployable outriggers, wherein the tower includes three series of pivotally interconnected tower sections or segments, sections or segments of which engage with segments of each of the other series when the tower is assembled; the mobile tower including a plurality of guy wires secured between the extendable and retractable tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the extendable and retractable tower at first and second connecting positions that are displaced from one another about an outer perimeter. Methods of deploying the mobile tower are also disclosed.

A wind turbine tower assembly device comprising a tower interface configured to be attached to a wind turbine tower during construction of the wind turbine tower, a nacelle interface for being attached to a part of a nacelle of a wind turbine and arranged to place the nacelle above a free end of a wind turbine tower which is attached to the tower interface; a lifting structure configured to move the nacelle interface relative to the tower interface to create a space between the free end of the wind turbine tower and the nacelle interface; a unit receiving structure configured to insert a tower unit into the space; and a tower assembly structure configured for joining the tower unit to the free end of the tower.

Apparatuses and methods for setting posts of columns in to the ground are provided. Expandable metals in response to hydrolysis that tend to fill in spaces and cavities, even over time, which is a useful feature when setting columns into the ground. A hydrolyzing fluid can be supplied, as necessary, to cause the hydrolysis of the expanding metal, or supplied by ground water. Upon hydrolysis, the expanding metal expands around the column to adhere and grip the column securely, while the metal may also expand outwardly to increase cross-sectional bulk lending to a more overall stabilization of a set column. The expandable metal may be provided as a solid sleeve drivable into the ground with a post, as an auger that can be used to turn a column into the ground or, as a rod that can be driven through the interior of a column into the ground.

A pneumatic telescopic column assembly for supporting and moving military equipment, communication equipment, lighting equipment and/or surveillance equipment is provided. The pneumatic telescopic column assembly extends along an axis and has a plurality of tube groups telescopically configurable between a compact configuration and an extended configuration. The plurality of tube groups has a base tube group, an intermediate tube group and a head tube group. The base tube group has a base tube element and a base locking ring that has at least one horizontal latch, at least one actuator and at least one vertical latch. The intermediate tube group has an intermediate tubular element and an intermediate locking ring that has at least one horizontal intermediate latch. The tubular head group has a tubular head element.

A pneumatic telescopic column assembly for supporting and moving military equipment, communication equipment, lighting equipment and/or surveillance equipment is provided. The pneumatic telescopic column assembly extends along an axis and has a plurality of tube groups telescopically configurable between a compact configuration and an extended configuration. The plurality of tube groups has a base tube group, an intermediate tube group and a head tube group. The base tube group has a base tube element and a base locking ring that has at least one horizontal latch, at least one actuator and at least one vertical latch. The intermediate tube group has an intermediate tubular element and an intermediate locking ring that has at least one horizontal intermediate latch. The tubular head group has a tubular head element.

A foundation system for supporting a structure may include a main post, a racking post, and a barb assembly. The main post may include an upper section and a lower section below the upper section. The racking post may be telescopically connected to the upper section of the main post. The barb assembly may be connected to the lower section of the main post. The barb assembly may be configured to move from an unexpanded state to an expanded state, thereby forming a wedge shape at a lower section of the main post.

A mast (10) which includes an elongate post (12) with a first end (14) and a second end (16), the first end (14) being pivotally secured to a ground-engaging support base, at least a first mechanism (22) to restrict pivotal movement of the post (12), a winch (26) which is attached to the post (12), and a cable (28) which is engaged with the winch (26) and which is secured at one end to an anchor (30), wherein the winch (26) is actuable to allow the post (12) to pivot, from an elevated position, in a first direction (54) which lowers the post (12) against the action of the movement restricting first mechanism (22), and which is actuable to pivot the post (12) in a second direction (56) which opposes the first direction (54) to elevate the post (12).

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

A method is provided for connecting two tubular or conical sections of a structure, especially of a wind turbine, by joining respective circular ends of the outer walls of these sections by welding, including the steps: positioning the two sections in such a way, that the circular ends are adjacent to each other, positioning a first part of a connection tool adjacent to the circular ends of the two sections, positioning a second part of the connection tool in such a way that the first and second part of the connection tool form a ring-shaped housing, blocking access to the circular ends from the outside of the sections, and using a welding head of the connection tool arranged within the ring-shaped housing to join the outer walls.