Projektowanie budowlane Robert Czech
Hourglass-shaped viewing tower (one-sheet hyperboloid) with height: 34.0m designed on the plan of a regular hexagon with a side of approximately 7.0m, building area: 126,75m2.
Foundation of the tower on a foundation slab. Main structure in the form of a grid of intersecting 12 glued laminated timber columns inscribed in the plane of the hyperboloid, topped by beams (glued laminated timber). Columns approximately 32m in length, the bases of the columns distributed over two circles (6+6, every 60°) with diameters respectively: 11.8m and 13.4m. The core of the tower is an octagonal glazed passenger lift shaft of 159mm diameter steel tubes with 60.3mm diameter steel tube braces. Surrounding the shaft is a 130cm wide, 16.5cm high steel fan staircase with rests every 14 steps. The tower has 3 viewing terraces at heights of +8.96m, +22.40m, +26.56m with a grid structure of rectangular steel beams. Each terrace is a rigid disc stabilised by timber columns. The uppermost terrace is roofed (wooden roof truss) and covered with glass panels. The roof truss in the form of 6 lattice girders resting on timber beams crowning the main columns and on a steel shaft. Between the girders, rafters spaced 80cm apart.
With reference to the programme areas that have been used in the AD programme, I set out below the benefits of their use in the corresponding order: