General Information

Figure 1 shows a canopy roof.

Inverted Pyramid

Figure 2 shows the canopy roof.

The structure consists of four columns, four transverse beams (marked by the numbers), tie beams, purlins, sag rods, and metal roofing sheets. The distance between the columns/transverse beams s ≅ 7 m, the purlin overhang a ≅ 4 m, and the width/transverse beam length l ≅ 11 m. The colums are made of a reinforced concrete part and a steel part, as shown in figure 3.

The steel part consists of an inverted four-sided pyramid with two levels of perimetral beams and a vertical member, which is connected to the RC part by a base plate with stiffeners and anchor bolts. The steel part is made of circular hollow profiles, while the RC part has a circular cross-section. The base vertices A and B are connected to the transverse beams, while C and D are connected to the tie beams. The transverse- and the tie beams are made of an I-section of the same size and placed at the same elevation. A schematic lateral view and a variant lateral view with a vertical steel column are shown in figure 4.

The transverse beam is supported at three points (O, B, and A) in the used variant, while at two points (O and G) in the vertical steel column variant. O is the support at the RC structure of the building. Both columns have a height of about 8.5 m and the same spacing (s); the RC sector is about 3 m.

Figure 5 shows a schematic layout of the roof.

The tie beams are marked in red. Figure 6 shows a bottom view of the canopy roof.