Professional protection against wind suction on roof terraces
If the wind suction load is not taken into account when planning a terrace, a roof terrace that is too light may “lift off” in strong winds. The forces acting are classified into wind load zones and differ depending on the region and building height. In Germany, these are classified from 1 to 4, with the highest class 4 being in sea areas. In addition to the wind load zones, the building height must also be taken into account in the calculation. The motto here is: the higher the building, the higher the wind suction load. The property-related values are determined by an architect.
Example: The total weight of a planned terrace, consisting of boards and substructure, is 0.8 kN/m². Taking the wind suction load into account, however, the value should be 1.2 kN/m². To achieve this value
the construction could be bolted to the floor of the building, for example. However, this is often not feasible as it would damage the underlying seal and allow water to penetrate.
For this reason, the new wind load support was developed as a system component that is simply snapped into place under the system rail and thus serves as a support for weights. This means that the specified value can be achieved by placing concrete slabs on the wind load beams, for example.
Wind zone and mixed profile | Velocity pressure q(ze) in kN/m² at a height h within the limits of | |||
|---|---|---|---|---|
h ≤ 10 | 10 m < h ≤ 18 m | 18 m < h ≤ 25 m | ||
1 | Inland | 0,50 | 0,65 | 0,75 |
2 | Inland | 0,65 | 0,80 | 0,90 |
3 | Coast and islands of the Baltic Sea | 0,85 | 1,00 | 1,10 |
4 | Inland | 0,80 | 0,95 | 1,10 |
5 | Coast and islands of the Baltic Sea | 1,05 | 1,20 | 1,30 |
6 | Inland | 0,95 | 1,15 | 1,30 |
6 | Coast and islands of the Baltic Sea | 1,25 | 1,40 | 1,55 |
Extract from flat roof guidelines
Wind load carrier
Previous slide Next slide Wind load carrier With its slab support for concrete slabs, the wind load support provides the necessary weighting for decking terraces