Abstract: An electrical power transmission tower includes a lattice structure having a lower end configured to be anchored to the ground, and an opposite upper end. The lattice structure includes a plurality of parallel legs joined together in a polygonal cross-section configuration to define an internal space. At least one support arm extends outwardly from the lattice structure and at least one insulator is suspended from the at least one support arm. The at least one insulator is configured to support one or more electrical power transmission lines. A mast is movable within the internal space of the lattice structure along a vertical axis between a lowered position and a raised position. The mast supports various electronic equipment, such as cellular antenna arrays, remote radio unit (RRU) arrays, microwave antennas, imaging equipment, acoustic sensors, tectonic or motion sensors, thermal sensors, chemical sensors, and/or nuclear sensors.

Abstract: A precast concrete post-tensioned segmented equipment tower including a lower segment of a relatively larger diameter, an upper segment of a relatively smaller diameter, and a transition segment there between, with a post-tensioning tendon spanning these segments and imparting a compressive pre-load between the segments, and a slot formed in an inwardly protruding surface of the transition segment for receiving and laterally retaining the tendon during installation and tensioning. The slot may be defined in a saddle formed of high density polyurethane which is cast into the inwardly protruding surface. An intrados surface of the saddle may be curved to impart a bend in the tendon.

Abstract: A precast concrete post-tensioned segmented equipment tower including a lower segment of a relatively larger diameter, an upper segment of a relatively smaller diameter, and a transition segment there between, with a post-tensioning tendon spanning these segments and imparting a compressive pre-load between the segments, and a slot formed in an inwardly protruding surface of the transition segment for receiving and laterally retaining the tendon during installation and tensioning. The slot may be defined in a saddle formed of high density polyurethane which is cast into the inwardly protruding surface. An intrados surface of the saddle may be curved to impart a bend in the tendon.