The general procedure, given in Eurocode 1 part 1-4 §A.3, is applicable for a well individualized obstacle (an emergent zone compared to a general ground without marked relief).
It takes into account the slope of the terrain that the wind follows and the position of the building in relation to the top of the hill or the crest of the escarpment. The windward terrain can be considered up to a distance of 10 times the height of the isolated orographic element.
When the orography increases wind velocity by more than 5%, it is recommended to consider the effects using the orography factor co.
The effect of orography may be neglected when the average slope of the terrain in the wind is less than 3°.
|Coordinates||6.3473°, 49.4484°||6.356°, 49.4498°||6.356°, 49.4498°||6.3703°, 49.4519°|
|Obstacle effective height H||136m||140m|
|Slope actual length Lu / Ld||650.1m||1061.6m|
|Slope angle Φ||20.9%||13.2%|
|Horizontal distance site/top x||47.8m|
|At the place of construction||275m|