Subject of this thesis is the development of a construction plan for a radio mast in northern Uganda. Almost all of the existing radio masts in Uganda are imported from abroad. This is due to the lack of architectural and engineering knowledge to plan such a tower whereas material and labor would be available. A development project called BOSCO is in need for such a radio mast to expand their rural network system in the recently war affected region of northern Uganda.
Aim of the thesis is to design a tower/mast construction which is technically equivalent to imported towers but made out of readily available materials and built by workers from the region. Consequently, the profit of the project stays within the region and, at the same time, costs could be economized in comparison to importing a readymade tower.
As it is not clear yet on which site the mast will be erected and as the network layout is changing fast, a modular system is required.
Therefore, another requirement of the tower/mast was to allow transportability and flexibility concerning its height. Two study trips - one month each - were undertaken in order to investigate available materials and the local circumstances.
After extensive research, a slender lattice steel mast which is stabilized with a so-called "sailboat guy system" has been proposed as the suitable prototype. Eight modules, 3 meters high each, can be plugged together, thus providing flexible height. This system was chosen for the following reasons: to provide a material efficient solution which ensures reasonable coverage. Steel processing is widely known and with this material a stiff and at the same time light weight solution was possible. Joints are mainly welded as this is the most common processing method. All modules can be prefabricated entirely in the workshops whereby the quality of implementation increases. Only at the intersections of the modules bolts are required. In order to guarantee the transportability of the mast as well as static requirements a light weight foundation with ground screws has been designed. They can be prefabricated in workshops as well.
The entire mast construction can be transported to the site in prefabricated units. Any single module can be physically carried by one person. The different modules and units can be plugged together in horizontal position on site. The mast is connected with the foundation through a hinge. Once horizontally assembled, the entire mast can be lifted by a cable winch of a common pick up. Finally, the guy system has to be connected with the anchors.
The realization of the project is planned to be implemented as soon as the required funding is provided. In this case, a final verification of the construction plans can be realized.