Over deze norm
This standard specifies two procedures for providing an estimate of the quantity of water likely to impact on a wall of any given orientation. It takes account of topography, local sheltering and the type of building and wall. The first method, given in Clause 4 and based on coincident hourly rainfall and wind data, defines the method of calculation of: - the annual average index, which influences the moisture content of masonry; - the spell index, which influences the likelihood of rain penetration through masonry. The second method, given in Clause 5 and based on average wind data and a qualitative recording of the presence and intensity of rain (the present weather code for rain), defines a method for calculating the spell length during which masonry is moistened, having a 10 % probability of being exceeded in any year (commonly referred to having a mean return period of 10 years). A comparison between the two methods is given in informative Annex D. Procedures are given to correct the results of both methods for topography, local sheltering and the type of building and wall.
|Nederlandse titel||Hygro-thermische eigenschappen van gebouwen - Berekening en weergave van klimatologische gegevens - Deel 3: Berekening van een slagregenindex voor verticale oppervlakken uit wind- en regengegevens per uur|
|Engelse titel||Hygrothermal performance of buildings - Calculation and presentation of climatic data - Part 3: Calculation of a driving rain index for vertical surfaces from hourly wind and rain data|