Why does the eHORA map of Austria give different snow loads than your Geo-Zone tool?
Why does the eHORA map of Austria give different snow loads than your Geo-Zone tool?
Answer
The differences between our snow load map and the HORA web application result from the interval of the data used. Our application strictly refers to the current standard ÖNORM B 1991‑1‑3:2022‑05 with an interval of 0.5 kN / m².
The HORA map, on the other hand, uses an interval of 0.1 kN / m². Thus, the Dlubal Geo-Zone Tool outputs more conservative, strictly standard-compliant values.
The images show the difference for the same coordinates at an example location in Austria. The eHORA map is shown above; our Geo-zone tool is shown below.
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Answer
The differences between our snow load map and the HORA web application result from the interval of the data used. Our application strictly refers to the current standard ÖNORM B 1991‑1‑3:2022‑05 with an interval of 0.5 kN / m².
The HORA map, on the other hand, uses an interval of 0.1 kN / m². Thus, the Dlubal Geo-Zone Tool outputs more conservative, strictly standard-compliant values.
The images show the difference for the same coordinates at an example location in Austria. The eHORA map is shown above; our Geo-zone tool is shown below.
eHORA Geo zones ÖNORM B 1991-1-3:2022-05 Snow load map Characteristic snow load
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