In EN 1991-1-4, the cp,net and cf values are specified in Table 7.6 for inclination angles of 0° - 30°. However, the table values for roof slopes greater than 30° are missing. How can the wind load for these roof slopes be calculated?
Hi Hubi17,
welcome to the Dlubal Community! 
Table 7.6 in EN 1991-1-4 refers to freestanding monopitch roofs. First, check whether this case applies to your application. For monopitch roofs on enclosed buildings, Table 7.3 applies, which provides values for roof slopes up to 75°.
A realistic approach to calculating the pressure coefficients would be a CFD analysis (Computational Fluid Dynamics) in our digital wind tunnel RWIND. 
Alternatively, an extrapolation of the pressure coefficients for roof slopes slightly greater than 30° could be an option. However, caution is advised here, as far as I can tell, extrapolation of the table values in this standard is not explicitly permitted.
I hope these hints help you further. If you have any more questions, I am happy to assist!
Best regards
Niklas Wanke
Dear Mr. Wanke,
Thank you very much for your prompt response.
However, my specific question was which approaches are to be applied for free-standing monopitch roofs. The table for free-standing monopitch roofs is limited to a slope angle of 30° according to the Eurocode. As you already pointed out, extrapolating the table beyond 30° is problematic. What solution approaches are available for angles greater than 30°?
Are there approaches for larger slope angles in the technical literature?
Thank you very much for your efforts.
Best regards
Hubert Reiter
Hi Hubi17,
Thank you very much for the clarification! :)
Unfortunately, I am not aware of any specific specialist literature on this topic. In this case, two options come to mind for how you could proceed:
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Evaluation through experimental investigations
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Conducting a CFD analysis – as already mentioned, this could also be a helpful method that you can implement, for example, with the software RWIND.
Best regards
Niklas Wanke
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