The contractor must demolish three existing timber security guard towers and dispose of the debris. They are then required to construct reinforced concrete frame structures with decking as replacements. The upper elevated sections of these new structures will be partitioned with wooden panels or timbers, including window and door finishing. Each tower measures approximately 9.28 ft x 9.28 ft (2.83 m x 2.83 m). The contractor must provide all equipment, tools, materials, labor, and supervision, while also being responsible for validating all dimensions and relevant information.