Product standards flameshield fireduct is fully compliant with bs 476 part 24 flameshield products have been fully tested in accordance with bs 476 part 24. Flat plate over steel hollow section frame rectangular hdlow section 60x25x3. This revision of the standard involved a change in the material used to construct the combustion chamber. This part of bs 476 specifies a method of test, the result being expressed as a fire propagation index, that provides a comparative measure of the contribution to the growth of fire made by an essentially flat material, composite or assembly. The sponsor sampled the material and the specimens were cut from the sample to the dimensions set out in the standard.
Prior to the tests, all of the specimens were conditioned to constant mass at a temperature of 23 2c and a relative humidity of 50 5%. It provides data suitable for comparing the performances of essentially flat materials. Bs 47620 fire resistance of load bearing elementsbritish standard preface the objective of determining fire resistance, as described in the part and the associated parts of bs 476, is to assess the behaviour of a specimen of an element of building construction when subjected to defined heating and pressure conditions. 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. The specimens were tested stuck down on to 12mm calcium silicate board using pva adhesive. Fire tests on building materials and structures part 7. Fire test center will provide british standard bs 4767 surface flammability test to. The following is reproduced from clause 4 of bs 476. Fire test center will provide british standard bs 476 7 surface flammability test to.
Bs 4765 is fire tests in building materials and structures. The specimen should be tested at full thickness provided that it can be fitted into the specimen holder, if not, the unexposed face should be cut away to reduce the thickness to a minimum of 50 mm. The test was performed in accordance with the procedure specified in bs 476. Part 7 for evaluating flame spread over materials used in hong kong is regarded as inadequate. Bs 6853bs 4767 test method the specimen is mounted in a watercooled holder and is exposed to a radiant panel over a ten minute test duration. Flameshield fireduct we manufacture and supply flameshield fireduct bs flameshield fireduct bs was the first noncoated ductwork system to achieve full compliance to all parts of the bs 476 part 24.
Specimen pivot arm section bb clarrping frame drnost fully 9en positim. S to indicate whether the test results apply to a flat horizontal or an inclined roof system, respectively. Foreword the present standard replaces the combustibility test specified in bs 4761. S to indicate whether the test results apply to a flat horizontal or an inclined roof system, respectively 4. 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. For bench tests, the variations in the burning rate of products are. This part should be read in conjunction with bs 476 20 which describes the general principles for these methods.
Form in which the specimens were tested the specimens were tested in the form of a composite. A class 1 classification is the best of four performance levels defined within the standard. Method of test to determine the classification of the surface spread of flame of products bs 47611. This part should be read in conjunction with bs 47620 which. 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. Bs 476 was first published as a single volume in 1932. Furnace the furnace was controlled so that its mean temperature complied with the requirements of bs 476.
The specimen is mounted in a watercooled holder and is exposed to a radiant panel over a ten minute test duration. The passive fire protection handbook riba product selector. It is primarily intended for the assessment of the performance of internal wall and ceiling linings. Enjoys great popularity with sign makers and manufacturers of stands for exhibitions and. Harmanthy editor, fire safety science and engineering. All bsi british standards available online in electronic and print formats.
Class 0 was classified according to part 7 and part 6 of bs 476 and required compliance with the fire propagation index in addition to the surface spread of flame. A revision was published in three parts as follows. Introduction this report presents an assessment to determine the anticipated fire resistance performance of currently ul classified dfr2 product, if subject to testing in accordance with bs 476. Bs 47620 fire tests on building materials and structures. To achieve class 0 a product must achieve class 1 in the part 7 test and also pass the part 6 test. Method for assessing the heat emission from building materials bs 47612. Method for classification of the surface spread of flame of productss. A class 1 classification is assigned by testing in accordance with bs 476. Bs 47622 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. The purpose of bs476 part 24 1987 and iso6944 1985 is to. Method for classification of the surface spread of flame of products.
Guide to the principles, selection, role and application of fire testing and their outputs. Method of test to determine the classification of the surface spread of flame of products. Scope to determine the performance of a product when it is subjected to conditions of test specified in this part of bs 476. Firetest classifications, construction systems parts, design, ceilings. We manufacture flameshield fireduct from the highest quality, galvanised sheet steel and is produced on specialist manufacturing systems. Flameshield fireduct fire rated ductwork bs 476 part 24. It provides data suitable for comparing the performances of. Classifications system based on rate and extent of spread of flame. This version of the report has been produced from a pdf format electronic file that has. White book c02 technical performance british gypsum. Fire tests on building materials and structurespart 7 method of test to determine the classification of the surface spread of flame of products. This version of the report has been produced from a pdf format.
This report in issued in accordance with our terms and conditions, a copy of which is available on request. The need for a glossary covering terms used in bs 476 has been established and this will be published separately as a british standard glossary of terms and definitions associated with fire. A new assessing strategy on flame spread over construction and lining materials is recommended to be developed. Floors should normally be tested or assessed in accordance with bs 476. Nepshaw lane south, morley, leeds, ls27 7jq materials testing. Fire tests on building materials and structures part 7 method of test to determine the classification of the surface spread of flame of products. Fire resistance testing bs 476 the building test centre. Method of test to determine the classification of the surface spread of flame of products en 5011. Fire tests on building materials and structures part 11. Schedule of accreditation united kingdom accreditation service. Part 22 testing regime, the partition height in the fire. This standard has been superseded by the current bs en 661, bs en 668 and bs en 669, but it has been retained based on a legitimate need for the standards within noneu markets.
Fire classification of construction products and building elements part1. Figure 7 location of thermocouples on horizontal ducts outside the. The test produces a fire rating of class 1, 2, 3 or 4 depending upon how far a flame travels over a coated surface. Nepshaw lane south, morley, leeds, ls27 7jq materials. This part of bs 476 has been prepared under the direction of the fire standards.
This standard makes reference to the following british standard. The test was carried out in accordance with bs 476. Please see page 5,6 and 7 of this test report for the full description of the product tested test sponsor tuff waterproofing ltd, unit 5, first avenue, aviation way, sherburnin elmet, north yorkshire, ls25 6pd test results in accordance with the designations defined in bs 476. Flameshield fireduct, fire rated ductwork, bs 476 part 24. 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. It provides data suitable for comparing the performances of essentially flat materials, composites.