BS EN 508-2:2008 pdf download

BS EN 508-2:2008 pdf download.Roofing products from metal sheet —Specification for self supporting productsof steel, aluminium or stainless steel sheet Part 2: Aluminium.

Reverse side painting or coating is used if being required for handhng and storage reasons as well as for corrosion protection in some installation conditions, Performance and test methods for coil coated aluminium shall be In accordance with EN 1396. NOTE 3 Special coatings or tens may be appsed to the reverse side to reduce the dripping of moisture caused by
4.3 Products
4.3.1 Mechanical resistance
The product shall resist the design loads from snow, wind and maintenance. These loads shall be factored such that they will not impair the performance of the roof.
NOTE Thi load level, the levels of safety and permissible detlecbon are damned in national building regulations.
4.3.2 CalculatIon and tests of m.chanlcal resistance
The mechanical performance of the product shall be stated by the manufacturer, together with details of how the values were determined in accordance with the national regulations of the country whore the product is to be used
NOTE I For calc*,dation and testing either national regulations or EN 1999-1-4 may be used,
NOTE 2 Calculation and test methods referred to in this EN mainly deal with trapezoidal sheets. Tiles. standing seani sheets and concealed Ibi sheets are used I, proprietary rooting systms. no structural requirements ere given within this standard br these products These products should nomialy be designed by testing
4.3.3. DImensions
4.3,3.1 General
The dimensions of the product shall be fixed in order that the roof constructed with these products can fulbl its
functions. ThIckness
Measurements of the thickness of manufactured products such as profiled sheets shall be made not less than 10 mm from the edges In accordance with EN 485-4.
Products shall be classified accorcng to tolerance on thickness as follows:
— class 1: full minus nominal normal tolerance according to EN 485-4;
— class 2: 1/2 minus nominal normal tolerance according to EN 485-4;
— class 3: zero minus tolerance.