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BS EN 13501-5:2016 pdf download

BS EN 13501-5:2016 pdf download.Fire classification of construction products and building elements Part 5: Classification using data from external fire exposure to roofs tests.
4 Classes of external fire performance of roofs/roof coverings
The classiIlcation set out in this European Standard is based upon the test methods contained in CEN/TS 1187. That standard incorporates four distinct test methods that correspond to different fire hazard scenarios. There is no direct correlation between the test methods and hence no generally acceptable hierarchy of classification between them.
Products classified in a given class are deemed to satisfy all the requirements of any lower class for the same test method/fire hazard scenario. The classes with their corresponding fire performance are given in Table 1.
5 Test methods
5.1 General
The four test methods given in CEN/TS 1187 are those to be used for classification purposes for roofs/roof coverings. The selection of the tests to be carried out is specified in 6.3. The classification parameters, the classes and the corresponding criteria are specified in Clauses 8 and 9.
5.2 Test 1: Method with burning brands
The test evaluates the performance of a roof under the conditions of thermal attack with burning brands. The performance includes the fire spread across the external surface of the roof, the fire spread within the roof and the fire penetration.
5.3 Test 2: Method with burning brands and wind
The test evaluates the performance of a roof covering under the conditions of thermal attack with burning brands and additional wind. The performance includes damaged length both on the roof covering and in the substrate.
5.4 Test 3: Method with burning brands, wind and supplementary radiant heat
The test evaluates the performance of a roof under the conditions of thermal attack with bLirning brands, additional wind and radiant heat. The performance includes the external fire spread and the fire penetration.
5.5 Test 4: Two-stage method incorporating burning brands, wind and supplementary radiant heat
The test evaluates the performance of a roof under the conditions of thermal attack with burning brands, wind and radiant heat. The performance includes the external fire spread and the penetration by fire.
6 Principles for specimen preparation, testing and classification
6.1 General requirements for specimen preparation
In general, this paragraph covers tests 1, 3 and 4.
Before testing, the test specimens shall be prepared and conditioned and, where relevant. mounted in accordance with the relevant test method and product standards or other technical specifications.
The external fire performance of a roof/roof covering includes such aspects as external and internal fire spread, external and internal damage, fire penetration and the occurrence of flaming droplets or debris. The external fire performance of a roof/roof covering therefore does not only depend on the burning behaviour of the exposed surface, the roof covering, but also on the influences of several components of the roof, such as the nature and thickness of insulating layers and vapour barriers together with their supporting elements. It may also depend on the systems of attachment of all components, e.g. glued or mechanically fastened.BS EN 13501-5 pdf download.

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