A system and method for installing a post-tensioning tendon (130) in an equipment tower (100). A sheave frame (196) attaches to anchor rods (140), and a pulley (198) is mounted to the sheave frame through which a hoisting cable (197) is passed for connection to an end (138) of the tendon to lift the tendon to the anchor rods. A carriage assembly (150) having a shank (152) and a bearing plate platform (154) extending transversely from the shank for receiving a bearing plate (170) is attached to the tendon. The carriage assembly includes a deflecting surface (158) to deflect the carriage assembly away from the installed bearing plate upon lowering after tendon attachment. A pair of hydraulic jacks (210) tension the tendon to a desired load.

A portable lightning protection system including a multi-section conductive mast assembly including at least a base mast section and a top mast section; an air terminal attachable to the top mast section; and a base assembly attachable to the base mast section via a hinge assembly, wherein the hinge assembly is configured to allow the base mast section to hinge from a substantially vertical position to a substantially horizontal position relative to the base assembly. A catenary lightning protection system including at least two lightning protection systems, each lightning protection system may include a multi-section conductive mast assembly including at least a base mast section and a top mast section; an air terminal attachable to the top mast section; a base assembly attachable to the base mast section; and may further include a catenary wire connected between the at least two lightning protection systems.

A tower assembly for a wind turbine includes a tower and a freestanding internal tower structure assembly. The tower has a tower wall defining an inner surface and an outer surface separated by a tower wall thickness, with the inner surface defining a tower interior. The internal tower structure assembly is positioned within the tower interior. The tower structure assembly includes a plurality of stackable support structures configured to support one or more internal tower components. Further, the tower structure assembly is freestanding within the tower interior.

Described is an auxiliary device for realizing a bolt connection between connecting flanges, placed against each other, of a first and a second structure. The auxiliary device includes a support body provided with a number of receiving positions for a bolt. The receiving positions are aligned with corresponding bolt holes in the connecting flanges to be placed against each other. The auxiliary device further includes a moving mechanism with which the support body can be moved toward the connecting flanges which are arranged against each other so that a number of bolts arranged in the receiving positions are arranged substantially simultaneously through the bolt holes. Also described is a corresponding method.

A drilling rig system includes a drilling rig that includes a mast, a pair of hydraulic pistons coupled to a pair of front legs of the mast and configured to apply a first force to the mast, the first force acting in a direction opposing a force generated by a weight of the mast, a plurality of raising lines coupled to a crown block of the mast and to a pair of rear legs of the mast opposite the front legs and configured to apply a second force to the mast, the second force acting in a direction opposing the force generated by the weight of the mast, and a drawworks assembly coupled to the plurality of raising lines and configured to apply a force acting away from the crown block of the mast to at least one of the plurality of raising lines to generate the second force.

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 rigging apparatus that generally encircles the tower and a plurality of guy wires secured between the tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the rigging apparatus at first and second connecting positions that are displaced from one another about an outer perimeter of the rigging apparatus. 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 rigging apparatus that generally encircles the tower and a plurality of guy wires secured between the tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the rigging apparatus at first and second connecting positions that are displaced from one another about an outer perimeter of the rigging apparatus. Methods of deploying the mobile tower are also disclosed.

A utility pole caddy has a trapezoidal-shaped component with a base and an opposing top. The top includes a concave portion effective to receive a utility pole positioned horizontally relative to the ground. The dimensions of the utility pole caddy are effective to deny pole movement without mechanical assistance. This utility pole secures utility poles at temporary work sites and prevents rolling, reduces vandalism by requiring a machine to remove a pole from the device, and assists crews setting poles by elevating the tops of the poles prior to setting.

A drilling machine is disclosed. The drilling machine may include a mast and a machine frame. The mast may include a mast frame, a movable drill head assembly, a first pivot aperture, and a plurality of first lock apertures each corresponding to a different drilling position of the mast. The machine frame may include an engine, a ground engaging assembly having an axle, and a mast coupling assembly having at least a pair of opposed legs, each leg including at least one plate. The at least one plate of each leg may include a second pivot aperture positioned to align with the first pivot aperture to pivotably couple the mast to each leg. The at least one plate may also include a second lock aperture positioned to align with each of the first lock apertures and receive a lock pin for locking the mast in a drilling position.

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.