EN ISO Reaction to fire test-Horizontal surface spread of flame on floor-covering systems- Determination of the burning behaviour using a radiant heat source AS EN Fire classification of construction products and building elements-Part1: Classification using data from reaction to fire tests.
With the lucubrate and development in fire science and fire protection, right from the combustion characteristics of flame spread, extend to include the rate of heat release, heat release, toxicity of smoke density and combustion result and other parameters. The classes is EN actively consider the above parameters, therefore more scientific. Therefore, today I will try to clarify the necessary tests and criteria as well as how to classify an A1 product without the need for testing.
The criteria for classifying a product as A1 or A2 are included in the EN standard. It is very important that you take into account that it is part 1, because the other parts of the same standard belong to fire resistance, roofs and cables. How does the Euroclass system work? The Euroclass system was introduced to harmonise standards across the EU.
It categorises products into one of seven reaction to fire classes ranging from A1 non-combustible down to F the worst performing class in terms of combustibility , using a defined test or combination of tests.
To do this, they used a room corner test ISO - Room corner test for wall and ceiling lining products as the reference point. Crucially, this test method was specifically designed to measure the burning behaviour of internal wall and ceiling lining products. This decision has led to flaws within the Euroclass system, particularly around the Single Burning Item SBI test which can be used to assess the reaction to fire of products from class A1-D.
Limited combustibility, A2, classification can be achieved by these panels with many different facing materials including various metals i.
Aluminium, Steel, Zinc, Copper, etc and back painted glass. To summarise, for aluminium rainscreen panels, the likely EN classifications that can be achieved are:.
We offer a number of rainscreen cladding solutions that have been tested to EN and achieve an A2 fire rating. This includes Proteus GL , an integrated modular glass rainscreen cladding system that utilises a back painted glass facing.
In addition, Proteus HR aluminium honeycomb core, structurally bonded between two thin gauges of lightweight metal skin has also been tested to EN achieving A2-s1,d0 or A2-s2,d0 subject to metal finish.
That is an important consideration because the BS test report is only valid for the exact construction and configuration of materials tested. We have been able to achieve an A2 rating on Proteus HR and Proteus GL cladding systems because of significant investment in product design and development as well as our detailed understanding of EN testing and accreditation requirements.
The straight forward message that we would give to installers is this; if you are choosing a cladding panel with a stiffening angle it will require considerable expenditure to have it tested and certified as achieving an EN A2 fire rating.
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