The tower consists of four basic components.
1. Foundation plate
3. Tower section
4. Universal attachment
Additional components are also available from Tower Solutions Inc., to simplify the installation and dismantling of a tower.
The tower components are light-weight and high-strength. They assemble together easily to construct any configuration that might be required for any transmission line or communication tower purpose. The unique design of these components sets a new standard for ease of use and functionality compared to other emergency towers on the market.
The foundation plate is designed to support the fully loaded tower, distributing its weight evenly to the ground. This plate is placed directly on the ground and fixed using four steel pinning rods installed in the corners of the plate. No other foundation structure is required.
The plate has a flange for attaching the articulation component.
A handle in each corner makes for easy handling.
When selecting a spot to erect the tower, the entire plate should make contact with the ground. Rocky or uneven soil must be smoothed to give a flat surface. Soft or wet ground needs to be assessed to determine the minimum surface area required for the foundation plate, and if necessary, Tower Solutions’ extension plates can be used to give a larger surface contact for better load bearing capacity.
The foundation plate does not need to be on level ground. It can be installed on a slope up to 30 degrees if necessary.
Material: Aluminum Alloy 6061-T6
Weight: 104 kg (229 lb)
The articulation consists of a fixed steel cone and a pivoting aluminum plate. The cone is mounted to the flange on the foundation plate and is fitted with a steel ball that connects with the pivoting plate. The pivoting plate connects the tower to the foundation. The pivoting plate has a proprietary weight-bearing surface made of a special bronze alloy that reduces friction to a minimum and eliminates corrosion. This prevents wearing of the galvanizing finish and provides an optimum surface for a weight bearing contact point.
The low friction properties of the bearing surface means that the tower is always free to move, so that the tower does not need to bend even with small movements. This enables the tower to hold much greater weights. The pivoting motion allows full freedom of movement in every direction, a feature that not only makes the tower very easy to erect, but also enables it to distribute load evenly at all times.
The pivoting ability of the tower means that it can be erected without having to line up the tower with the direction of the overhead conductors. The base can be positioned to suit ground conditions, even on inclined terrain if necessary, because the tower’s ability to rotate makes it adjustable to any direction.
The articulation is easy to assemble. Attachment blocks welded to the sides of the cone are used to accommodate threaded rods that support the pivoting plate during transport and storage. These blocks also make a handy step for the line worker for beginning the climb up the tower.
Material: G40.21-44W Galvanized steel, Bronze Alloy C954, Aluminum Alloy 6061-T6
Weight: 120 kg (265 lb)
3. Tower Section
The tower section is carefully designed, with meticulous attention paid to every detail and dimension. Each tower section is fabricated as an extruded rectangular cross-section, with uniformly spaced openings on all four sides. These openings serve a number of purposes, such as access for bolts and other components. Universal attachment plates can be placed anywhere on the tower. The smaller wall surface area reduces the surface area exposed to wind, while the unique shape of the holes is specially designed to add strength to the tower.
All of the features of the tower contribute to giving this tower the highest strength-to-weight ratio of any temporary tower product on the market, handling requirements from simple scenarios to high strength requirements where heights exceed 70 m (230’).
The dimensions of the tower section are 2580 mm x 460 mm x 460 mm (8.46’x 18.1” x 18.1”). These particular dimensions have proven to have the most optimal strength to weight characteristics and to be the most versatile in adapting to any configuration requirement. A tower section with these dimensions is also efficiently stored, vertically in standard 20’ HC sea containers. All tower sections are exactly identical.
Each of the four corners of the tower section has a specially designed corner track that forms a continuous rail along the entire length of the tower. This allows for easy up and down travel for tools such as the gin-pole and the fall arrestor along any of the four corners, even with guy wires and insulators installed. The gin-pole is used to hoist tower sections and the fall arrestor is used to safely secure the line worker to the tower.
Material: Aluminum Alloy 6061-T6
Weight: 124 kg (273 lb)
4. Universal attachment
The universal attachment is a component used for attaching guywires and insulators to the tower. It is placed on the outside wall of the tower, bolted to a backing plate on the inside wall, using standard 5/8” bolts (or metric equivalent). The universal attachment can be placed anywhere along the tower. When two are placed opposite to each other, the loading of guywires and insulators are transferred evenly onto the axis of the tower, which increase the overall strength of the tower. Transfer rods can be installed to connect the two opposing attachment plates, transferring the load even more directly onto the axis of the tower and reducing stress on the tower.
The innovative design of the universal attachment provides both horizontal and vertical freedom of movement for post insulators. This equalizes the unbalanced longitudinal conductor loads of adjacent spans and enables vertical inclination of the post insulator. Conductor movement is damped and forces caused by conductor movement are not transmitted to the tower.
Material: Aluminum Alloy 356-T6
Weight: 12 kg (27 lb)
All materials used in the manufacture of the Tower Solutions emergency tower system have been carefully selected to ensure the best possible performance in service. The proprietary welding process used in the manufacture of the aluminum components ensures the highest possible quality in material integrity and product workmanship. The tower is made of structural aluminum 6061-T6.