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<p><b>1.1 </b>This part of ISO 5658 specifies an intermediate-scale method of test for measuring the vertical spread</p>
<p>(upward and downward) of flame over a specimen of a product orientated in the vertical position. A measure of</p>
<p>lateral spread can also be obtained. It provides data suitable for comparing the performance of materials,</p>
<p>composites or assemblies, which are used as the exposed surfaces of walls or other vertically orientated products</p>
<p>in construction applications. Some products with profiled surfaces can also be tested with a modified procedure</p>
<p>representative of the end-use conditions of the product.</p>
<p><b>1.2 </b>Upward flame spread is not limited to surfaces which are vertical. It is recognized that an enhanced form of</p>
<p>upward, wind-aided flame spread can also occur on surfaces at an angle greater than 20° from the horizontal</p>
<p>without any external ventilation. This type of flame spread can occur in both planar sloping surfaces and stepped</p>
<p>surfaces such as stairs. Flame spread in these situations can become very rapid and can cause serious problems</p>
<p>in escape ways such as staircases. When assessing stepped or sloping surface materials, it may be more</p>
<p>appropriate to use a vertical flame spread test rather than a test in which the specimen is horizontal.</p>
<p><b>1.3 </b>This part of ISO 5658 is applicable to the measurement and description of the properties of materials,</p>
<p>products, composites or assemblies in response to radiative heat in the presence of non-impinging pilot flames</p>
<p>under controlled laboratory conditions. The heat source may be considered to represent a single burning item such</p>
<p>as a wastepaper bin or an upholstered chair within an enclosure, and this scenario would generally be considered</p>
<p>to apply during the early developing stage of a fire (see ISO/TR 11696-1 and ISO/TR 11696-2). This part of</p>
<p>ISO 5658 should not be used alone to describe or appraise the fire hazard or fire risk of materials, products,</p>
<p>composites or assemblies under actual fire conditions.</p>
Reģistrācijas numurs (WIID)
24934
Darbības sfēra
<p><b>1.1 </b>This part of ISO 5658 specifies an intermediate-scale method of test for measuring the vertical spread</p>
<p>(upward and downward) of flame over a specimen of a product orientated in the vertical position. A measure of</p>
<p>lateral spread can also be obtained. It provides data suitable for comparing the performance of materials,</p>
<p>composites or assemblies, which are used as the exposed surfaces of walls or other vertically orientated products</p>
<p>in construction applications. Some products with profiled surfaces can also be tested with a modified procedure</p>
<p>representative of the end-use conditions of the product.</p>
<p><b>1.2 </b>Upward flame spread is not limited to surfaces which are vertical. It is recognized that an enhanced form of</p>
<p>upward, wind-aided flame spread can also occur on surfaces at an angle greater than 20° from the horizontal</p>
<p>without any external ventilation. This type of flame spread can occur in both planar sloping surfaces and stepped</p>
<p>surfaces such as stairs. Flame spread in these situations can become very rapid and can cause serious problems</p>
<p>in escape ways such as staircases. When assessing stepped or sloping surface materials, it may be more</p>
<p>appropriate to use a vertical flame spread test rather than a test in which the specimen is horizontal.</p>
<p><b>1.3 </b>This part of ISO 5658 is applicable to the measurement and description of the properties of materials,</p>
<p>products, composites or assemblies in response to radiative heat in the presence of non-impinging pilot flames</p>
<p>under controlled laboratory conditions. The heat source may be considered to represent a single burning item such</p>
<p>as a wastepaper bin or an upholstered chair within an enclosure, and this scenario would generally be considered</p>
<p>to apply during the early developing stage of a fire (see ISO/TR 11696-1 and ISO/TR 11696-2). This part of</p>
<p>ISO 5658 should not be used alone to describe or appraise the fire hazard or fire risk of materials, products,</p>
<p>composites or assemblies under actual fire conditions.</p>
