Our policy towards the use of cookies Techstreet uses cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser. Request Free Trial. Language: English. This part of BS specifies the exposure categories related to test pressure levels for air permeability, watertightness and wind resistance for external windows and doorsets.
It is applicable to all types of vertical windows and doorsets, and includes windows in which the opening lights are not fully framed, e. An abbreviated method for calculating wind loading is given in Annex A.
This takes into account factorsthat allow selection and specification of the appropriate classification. The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument including any amendments applies. Tests shall be conducted with both positive and negative pressures. Classification levelsapplicable in the UK shall be in accordance with Table 1.
The air flow passing through the specimen, at each pressure difference applied in accordance withBS EN test method, shall be expressed as an average leakage rate per metre length of opening jointvisible on the inner face of the specimen and average leakage per metre square of window area. A graph of air permeability rate against test pressure difference shall be constructed. Classification for weathertightness and guidance on selection and specification Withdrawn.
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