General Information

Figure 1 shows a covered sports field.

Covered sports field.
Covered sports field structure

Trusses

Figure 2 shows a covered sports field sector.

Covered sports field.
Covered sports field structure with main measures

The span s ≅ 30 m, the span b ≅ 15 m, and the arc rise h ≅ 5 m. Figure 3 shows the structure viewed from below.

Covered sports field.
Covered sports field structure with arch trusses

The steel structure consists mainly of not-braced steel columns, arch trusses, five longitudinal trusses (marked by the numbers), purlins, and metal roofing sheets. Figure 3 shows a schematic partial three-dimensional view of a structure sector.

Three-dimensional view.
Three-dimensional drawing of the steel structure of a covered sports field

Longitudinal truss 3 has diagonal members, while the remaining longitudinal trusses (1, 2, 4 and 5) do not.

  • Are all longitudinal trusses required for the structural safety during the usage period of the building?
    What is the structural purpose of each longitudinal truss?