BS EN 508-2:2009 pdf download

BS EN 508-2:2009 pdf download.Roofing products from metal sheet Specification for self supporting products of steel, aluminium or stainless steel sheet Part 2: Aluminium.
4.3.4 Dimensional tolerances for the profiled sheet
Tolerances for the profile shape of the product and methods of measurement shall be In accordance with
Annex B.
4.3.5 Safety In case of fire
Until the withdrawal of national technical specifications, products coaled with organic coatings shall comply with these specifications
NOTE I The withdrawal of nabonal technical specificatIons will occur in the Ewopean Union at the end of the transitional period of EN 14762.
NOTE 2 Aluminium a non-canbuslible It will not burn and w not support contimbon. Its melting point t approxImately 630 C. tO It will mdl In an Intense Ire It a essential that the effect of a fire Is evaluated after sludyeig the whole structure
5 Test methods
5.1 Material properties
Test methods for material properties are given in the appropriate material standards as detailed ii 4.2.
5.2 Surface properties
Test methods for surface properties are given In EN 13%
5.3 Structural properties
The performance of the product under distributed load shall be determined In accordance with 43.1 and 4.3.2.
The performance of the product under concentrated load shall be quoted by the manufacturer with reference to the method used to determine the results
NOTE Safety under the load from peopte and the flslc of peemanent deformation a dependent on many faclors, such as slope of roof, method of sistalteton, etc.
Methods for testing the strength under concentrated load are not yet available on a Eisopeai level. Infonnabon on national slandards is given in Annex C- Rules for Installation are wven si some natIonal codes.
6 Designation
Products covered by this part of EN 508 shall be designated as follows:
— type of product according to the designation of the manufacturer;
— European standard number,
— nominal thickness and thickness class (see 4.3.3.2):
malarial (designation of material) (see 3.5 and 4.2);
length:
length of step (only for tiles)
A.4 Methods for measuring profiles
&4.1 General
The measurements shal be made ii the factory, before delivery aid corrected to a temperature of 20 ‘C where appeopriate.
Measurements of depth of profile depth of stiffeners, pitch, crown, valley and cover width shall be carried out at 200 mm from the profiled sheet end
When measurements are taken, the profiled sheet should be placed on at least three equally spaced supports which are on a rigid flat surface.
Measurements of distances shall be taken Mtt an instrument capable of taking measurements to an accuracy of at least 0.1 mm for linear measurements up to and including 10 mm. an accuracy of at least 0,5 mm greater than 10 mm and up to and including 1000 mm and an accuracy of at least 1,0 mm when measuring distances exceeding 1 000 mm When measuring racki. the instrument shall be capable of taking measurements to an accuracy of at least 0,5 mm.
The following methods shall be used, unless another method has been demonstrated to provide results of the required accuracy.
A.4.2 Depth of profile
The depth of each valley across the sheet shall be measured by means of a template or a measuring rule at both sides of the valley as illustrated in Figure A.20. The tolerances in A.1.2 and A.3.2 apply to the average value for each valley
A.4.6 Cover width
The cover width of the sheet shall be measured across the sheet at three positions as the distance between
two plates placed on the side webs (method analogous to A.4.4) or by means of a gauge as ilustrated in
Figure A.23.
A.4.7 Radius of bends
The radius of bends shall be measured on the inside of the bend. The appropriate tolerance in A.1.7 and A3.7
applles to each bend.
A.4.8 Straightness
The straightness of a sheet shall be measured from a thin cord stretched between two points on the same
edge at 200 mm from each end of the sheet. The measurement shall be made at the centre of the sheet
A.4.9 Squareness
The squareness of a profled sheet shall be determined as ilustrated In Figures A7 and A.19.
A.4.10 Length
The length shall be measured along the theoretial centre axis of the sheet as lustratedt in Figure A.8.
A.4.11 Side laps
The deviation (D) of the side lap edge shall be measured as the distance from a 500 mm straight edge as llustrated in Figure A.24.