This part, together with bs 476 20, 21, 23 and 24, supersedes bs 476 8. Bs 6853 bs 476 7 test method the specimen is mounted in a watercooled holder and is exposed to a radiant panel over a ten minute test duration. Guide to full scale fire tests within buildings bs en 597 1. A bs 4767 fire test to building material standard brief this part of bs 476 specifies a method of test for measuring the lateral spread of flame along the surface of a specimen of a product orientated in the vertical position under opposed flow conditions, and a classification system based on the rate and extent of the spread of flame. Part 7 the complete assembly of materials as installed shall achieve a class 1 spread of flame. This specifies a method of test for measuring the lateral spread of flame along the surface of a specimen of a product orientated in the vertical position. The test results for the individual specimens, together with observations made during the test and comments on any difficulties encountered during the test are given in appendix 1. Assessment of the ignitability of mattresses and upholstered bed bases. To achieve a class 0 fire rating, products must meet specific british standards and pass a series of tests designed to test flame spread and propagation. Fire classification in accordance with british standards ics services. Other bs standards measure levels of smoke or toxicity. The test result is a function of the distance and rate of, the lateral spread of flame.
Class 1 is a classification defined by bs476 pt 7 surface spread of flame. Mar 02, 2012 fire tests on building materials and structures part 7. All materials shall be tested in accordance with the relevant sections of bs 476. The values obtained in the two tests bs 476 part 6 and 7 can be used to classify materials as class 0, class 1 and class 3. Flat plate section aa clamping frame in closed position with specimen in situ. Fire tests on building materials and structures part 7. The development of this test was initiated by some disastrous fires caused by rapid flame spread along wall linings. Wira house fire west park ring road technology england. The impact of european fire test and classification. The test produces a fire rating of class 1, 2, 3 or 4 depending upon how far a flame travels over a coated surface. This version of the report has been produced from a pdf format electronic file. The fire test methods bs 476 parts 6 and 7 measure different characteristics of fire performance from the european fire test methods bs en 823 and bs en iso 119252.
S1, d0 q1 limited smoke development holland nen en 501. This test was introduced by the british standards institution in 1945. An uncertainty of measurement estimation has been conducted in relation to the distance travelled by the flame front and the fi ndings are as detailed on page 8. The material has achieved a classification of cs3, d2 or better when tested in accordance with bs en. A product must be also be classified as a class 1 building material for bs 476 7. An uncertainty of measurement estimation has been conducted in relation to the distance travelled by the flame front and the fi ndings are as detailed on page 9. Bs 476 4 fire tests on building materials and structures part 4. This report in issued in accordance with our terms and conditions, a. An uncertainty of measurement estimation has been conducted in relation to the distance travelled by the flame front and the findings are as detailed in appendix 2. Generic description product reference thickness application rate weight per unit area or density. Fire classification in accordance with british standards. The material of the wall or ceiling when tested to bs 476.
The spread of flame test bs 476 referenced in wilsons table ii is the same as the bs 476 part 7. This version of the report has been produced from a pdf format electronic. Fire tests on building materials and structures part 7 method of test to determine the classification of the surface spread of flame of products. Class 0 materials perform well in fire situations and can be used without restriction within a building. This part of bs 476 specifies a method of test for measuring the. Main body of apparatus main body of apparatts clamping frame shwn in almst fully open position.
This part should be read in conjunction with bs 476 20 which describes the general principles for these methods. Part 6, bs 6575, bs 415, bs 3212 replaces bs 476 5. This part should be read in conjunction with bs 476 20 which describes the general principles for. However, the latter will still be made available on request since it is referred to in building regulations and other legislative documents. Bs 476 22 has been prepared under the direction of the fire standards committee, and describes the procedures for determining the fire resistance of nonloadbearing elements of building construction. A thermocouple is inserted into the centre of the specimen and connected to the logging equipment. To achieve class 1 bs 476 part 7 classification, the spread of flame must not be more than 165mm in 10 minutes. Bs 476 part 7 specifies a method of test for measuring the lateral spread of flame along the surface of a specimen of a product orientated in the vertical position under opposed flow conditions, and a classification system based on the rate and extent of. Bs en iso 119252 small flame test simulates exposure to a small flame ignition source see figure 2 below. Requirements the class limits for flamespread, detailed in bs 476. Criteria for classification if the prefix d or suffix r or y is included in the classification, this indicates that the results should be treated with caution. Test methods for the determination of strength and durability bs 476 32. The product must first meet the fire propagation requirements as outlined in bs 476 6.
The specimen is mounted in a watercooled holder and is exposed to a radiant panel over a ten minute test duration. The impact of european fire test and classification standards. This version of the report has been produced from a pdf format electronic file that has been provided by. The class limits for flame spread, detailed in bs 476. Nepshaw lane south, morley, leeds, ls27 7jq materials testing. Classification in accordance with the class definitions given in bs 476. Class 1 is a classification defined by bs476 pt 7 surface spread of. Part 1, bs 5423, bs 5852, health and safety at work etc. Method for classification of the surface spread of flame of products.
Method for determination of the fire resistance of elements of construction general principles. A class 1 classification is assigned by testing in accordance with bs 476. This version of the report has been produced from a pdf format. In accordance with the class definitions given in bs 476.
Methods for determination of the contribution of components to the fire resistance of a structure. A british standard does not purport to include all the necessary provisions of a contract. This document replaces issue 1 dated 22nd july 2016 of the same number which. Fire tests on building materials and structures bs 476.
To achieve class 0 a product must achieve class 1 in the part 7 test and also pass the part 6 test. Scope of test the tests are designed to enable measurement of. The bs 476 part 5 is now obsolete and has been withdrawn although it is still quoted in bs 5422. The test was performed in accordance with the procedure specified in bs 476. Nepshaw lane south, morley, leeds, ls27 7jq materials. Method for classification of the surface spread of flame of productss. Class 1 to bs 476 part 7 surface spread of flame the spread of flame must not be more than 165mm in 10 minutes. If the prefix d or suffix r or y is included in the classification, this indicates that the results should be treated with caution. The test measures the distance and time a flame will spread across a surface. Criteria for classification if the prefix d or suffix r or y is included in the classification, this indicates that the results should be. Requirements and tests for exposed surfaces having. All bsi british standards available online in electronic and print formats. Wira house fire west park ring road technology england services.
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