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 involved 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 building-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. However, taking into account the wind suction load, the value should be 1.2 kN/m². To achieve this value at
, the structure could be bolted to the floor of the building, for example. However, this is often not feasible as it would damage the underlying waterproofing 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, for example, by placing concrete slabs on the wind load carriers.
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 the flat roof guideline
Wind load carrier
Wind load carrier With its slab support for concrete slabs, the wind load support provides the necessary weighting for decking with high wind suction loads.