Resistance to wind pressure and wind suction is defined in DIN EN 12210 and is an essential quality feature of windows and exterior doors. The degree of frame deflection at a certain test pressure is evaluated for classification into different categories. These are described with the following abbreviations:
Frame deflection: Class A (relative frontal deflection ≤1/150), B (≤1/200) and C (≤1/300)
Design pressure: Class 1 (400 Pa test pressure) to 5 (2,000 Pa test pressure)
Example: Wind resistance B2: This corresponds to a deflection of max. 1/200 at a test pressure of 800 Pa.
A clear decision-making aid for the selection of the right wind resistance is provided by Tables 2 and 3 of the "Guideline FE-05/2, Application Recommendations for Windows and Exterior Doors – Part 1" of ift-Rosenheim. There, a tabular classification must be made depending on the wind load zone, the installation height and the terrain category.
Source: bauwion
