General Information

Figure 1 shows a covered sports tribune.

The roof structure consists of prestressed concrete, steel roof bracing, purlins, and metal roofing sheets.

Concrete Cracks

Figure 2 shows a schematic partial cross-section of the structure.

The maximal cantilever arm a ≅ 27 m. The cracks are located in the horizontal-to-vertical back junction region. Figure 3 shows a back view of the covered sports tribune.

The red circles mark the locations of the cracks. Figure 4 shows an enlarged view of location A.

There are two horizontal cracks; water leakage from crack 2 is noticeable. Two other crack locations viewed from the side are shown in figures 5 and 6, respectively.

There are one vertical and two horizontal cracks.

There is one horizontal crack with plants growing out of it.