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<sec id="sec_1.1"><label>1.1</label><p>This part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std> specifies an intermediate-scale method of test for measuring the vertical spread (upward and downward) of flame over a specimen of a product orientated in the vertical position. A measure of lateral spread can also be obtained. It provides data suitable for comparing the performance of materials, composites or assemblies, which are used as the exposed surfaces of walls or other vertically orientated products in construction applications. Some products with profiled surfaces can also be tested with a modified procedure representative of the end-use conditions of the product.</p></sec><sec id="sec_1.2"><label>1.2</label><p>Upward flame spread is not limited to surfaces which are vertical. It is recognized that an enhanced form of upward, wind-aided flame spread can also occur on surfaces at an angle greater than 20° from the horizontal without any external ventilation. This type of flame spread can occur in both planar sloping surfaces and stepped surfaces such as stairs. Flame spread in these situations can become very rapid and can cause serious problems in escape ways such as staircases. When assessing stepped or sloping surface materials, it may be more appropriate to use a vertical flame spread test rather than a test in which the specimen is horizontal.</p></sec><sec id="sec_1.3"><label>1.3</label><p>This part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std> is applicable to the measurement and description of the properties of materials, products, composites or assemblies in response to radiative heat in the presence of non-impinging pilot flames under controlled laboratory conditions. The heat source may be considered to represent a single burning item such as a wastepaper bin or an upholstered chair within an enclosure, and this scenario would generally be considered to apply during the early developing stage of a fire (see <std std-id="iso:std:iso:tr:11696:-1:en" type="undated"><std-ref>ISO/TR 11696-1</std-ref></std> and <std std-id="iso:std:iso:tr:11696:-2:en" type="undated"><std-ref>ISO/TR 11696-2</std-ref></std>). This part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std> should not be used alone to describe or appraise the fire hazard or fire risk of materials, products, composites or assemblies under actual fire conditions.</p></sec><sec id="sec_2" sec-type="norm-refs"><label>2</label><title>Normative references</title><p>The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std>. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std> are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.</p><ref-list><ref><std std-id="iso:std:iso:554:en" type="undated"><std-ref>ISO 554</std-ref>, <title>Standard atmospheres for conditioning and/or testing — Specifications.</title></std></ref><ref><std std-id="iso:std:iso:tr:11696:-1:en" type="undated"><std-ref>ISO/TR 11696-1</std-ref>, <title>Uses of reaction to fire test results — Part 1: Application of test results to predict fire performance of internal linings and other building products.</title></std></ref><ref><std std-id="iso:std:iso:tr:11696:-2:en" type="undated"><std-ref>ISO/TR 11696-2</std-ref>, <title>Uses of reaction to fire test results — Part 2: Fire hazard assessment of construction products.</title></std></ref><ref><std std-id="iso:std:iso:13943:en" type="undated"><std-ref>ISO 13943</std-ref>, <title>Fire safety — Vocabulary.</title></std></ref><ref><std std-id="iso:std:iso:tr:14697:en" type="undated"><std-ref>ISO/TR 14697</std-ref>, <title>Fire tests — Guidance rules on the choice of substrates for building products.</title></std></ref></ref-list></sec><sec id="sec_3" sec-type="terms"><label>3</label><title>Terms and definitions</title><p>For the purposes of this part of <std std-id="iso:std:iso:ts:5658:en" type="undated"><std-ref>ISO 5658</std-ref></std>, the terms and definitions given in <std std-id="iso:std:iso:13943:en" type="undated"><std-ref>ISO 13943</std-ref></std> apply, together with the following.</p><term-sec id="sec_3.1"><label>3.1</label><p1:termEntry xmlns:p1="urn:iso:std:iso:30042:ed-1" id="term_3.1"><p1:langSet xml:lang="en"><p1:definition>fabrication of materials and/or composites, for example sandwich panels</p1:definition><p1:note>The assembly may include an air gap (see <xref ref-type="sec" rid="sec_6.3.6">6.3.6</xref>).</p1:note><p1:tig><p1:term>assembly</p1:term><p1:partOfSpeech value="noun"/></p1:tig></p1:langSet></p1:termEntry></term-sec><term-sec id="sec_3.2"><label>3.2</label><p2:termEntry xmlns:p2="urn:iso:std:iso:30042:ed-1" id="term_3.2"><p2:langSet xml:lang="en"><p2:definition>board with the same dimensions as the specimen and used to back the specimen so as to represent end-use conditions</p2:definition><p2:see target="sec_7.10"/><p2:tig><p2:term>backing board</p2:term><p2:partOfSpeech value="noun"/></p2:tig></p2:langSet></p2:termEntry></term-sec><term-sec id="sec_3.3"><label>3.3</label><p3:termEntry xmlns:p3="urn:iso:std:iso:30042:ed-1" id="term_3.3"><p3:langSet xml:lang="en"><p3:definition>that part of the damaged area of a material which has been destroyed by either combustion or pyrolysis, under specified test conditions</p3:definition><p3:tig><p3:term>burned area</p3:term><p3:partOfSpeech value="noun"/></p3:tig></p3:langSet></p3:termEntry></term-sec><term-sec id="sec_3.4"><label>3.4</label><p4:termEntry xmlns:p4="urn:iso:std:iso:30042:ed-1" id="term_3.4"><p4:langSet xml:lang="en"><p4:definition>combination of materials which are generally recognized in building construction as discrete entities</p4:definition><p4:example>Coated or laminated materials.</p4:example><p4:tig><p4:term>composite</p4:term><p4:partOfSpeech value="noun"/></p4:tig></p4:langSet></p4:termEntry></term-sec><term-sec id="sec_3.5"><label>3.5</label><p5:termEntry xmlns:p5="urn:iso:std:iso:30042:ed-1" id="term_3.5"><p5:langSet xml:lang="en"><p5:definition>total of the area of material affected by thermal phenomena under specified test conditions</p5:definition><p5:see target="sec_10.11"/><p5:tig><p5:term>damaged area</p5:term><p5:partOfSpeech value="noun"/></p5:tig></p5:langSet></p5:termEntry></term-sec><term-sec id="sec_3.6"><label>3.6</label><p6:termEntry xmlns:p6="urn:iso:std:iso:30042:ed-1" id="term_3.6"><p6:langSet xml:lang="en"><p6:definition>that surface of the specimen subjected to the heating conditions of the test</p6:definition><p6:tig><p6:term>exposed surface</p6:term><p6:partOfSpeech value="noun"/></p6:tig></p6:langSet></p6:termEntry></term-sec><term-sec id="sec_3.7"><label>3.7</label><p7:termEntry xmlns:p7="urn:iso:std:iso:30042:ed-1" id="term_3.7"><p7:langSet xml:lang="en"><p7:definition>boundary of the combustion zone in the gaseous phase at the surface of a material</p7:definition><p7:note>For vertical flames, the flame front is the tip of continuous flames, disregarding any detached transitory flame-segments.</p7:note><p7:tig><p7:term>flame front</p7:term><p7:partOfSpeech value="noun"/></p7:tig></p7:langSet></p7:termEntry></term-sec><term-sec id="sec_3.8"><label>3.8</label><p8:termEntry xmlns:p8="urn:iso:std:iso:30042:ed-1" id="term_3.8"><p8:langSet xml:lang="en"><p8:definition>existence of flame on or over the surface of the specimen for periods of less than 1 s</p8:definition><p8:tig><p8:term>flashing</p8:term><p8:partOfSpeech value="noun"/></p8:tig></p8:langSet></p8:termEntry></term-sec><term-sec id="sec_3.9"><label>3.9</label><p9:termEntry xmlns:p9="urn:iso:std:iso:30042:ed-1" id="term_3.9"><p9:langSet xml:lang="en"><p9:subjectField>at a point of a surface</p9:subjectField><p9:definition>quotient of the radiant heat flux incident on an infinitesimal element of surface containing the point, and the area of that element</p9:definition><p9:tig><p9:term>irradiance</p9:term><p9:partOfSpeech value="noun"/></p9:tig></p9:langSet></p9:termEntry></term-sec><term-sec id="sec_3.10"><label>3.10</label><pA:termEntry xmlns:pA="urn:iso:std:iso:30042:ed-1" id="term_3.10"><pA:langSet xml:lang="en"><pA:definition>single substance or uniformly dispersed mixture</pA:definition><pA:example>Metal, stone, timber, concrete, mineral fibre, polymers.</pA:example><pA:tig><pA:term>material</pA:term><pA:partOfSpeech value="noun"/></pA:tig></pA:langSet></pA:termEntry></term-sec><term-sec id="sec_3.11"><label>3.11</label><pB:termEntry xmlns:pB="urn:iso:std:iso:30042:ed-1" id="term_3.11"><pB:langSet xml:lang="en"><pB:definition>material, composite or assembly about which information is required</pB:definition><pB:tig><pB:term>product</pB:term><pB:partOfSpeech value="noun"/></pB:tig></pB:langSet></pB:termEntry></term-sec><term-sec id="sec_3.12"><label>3.12</label><pC:termEntry xmlns:pC="urn:iso:std:iso:30042:ed-1" id="term_3.12"><pC:langSet xml:lang="en"><pC:definition>power emitted, transferred or received in the form of radiation</pC:definition><pC:tig><pC:term>radiant heat flux</pC:term><pC:partOfSpeech value="noun"/></pC:tig></pC:langSet></pC:termEntry></term-sec><term-sec id="sec_3.13"><label>3.13</label><pD:termEntry xmlns:pD="urn:iso:std:iso:30042:ed-1" id="term_3.13"><pD:langSet xml:lang="en"><pD:definition>representative piece of the product which is to be tested together with any substrate or treatment</pD:definition><pD:note>The specimen may include an air gap. The specimen may also be tested as a stand-alone product without substrates if this is representative of end-use conditions.</pD:note><pD:tig><pD:term>specimen</pD:term><pD:partOfSpeech value="noun"/></pD:tig></pD:langSet></pD:termEntry></term-sec><term-sec id="sec_3.14"><label>3.14</label><pE:termEntry xmlns:pE="urn:iso:std:iso:30042:ed-1" id="term_3.14"><pE:langSet xml:lang="en"><pE:definition>propagation of a flame front over the surface of a product under the influence of imposed irradiance and non-impinging pilot flames</pE:definition><pE:tig><pE:term>spread of flame</pE:term><pE:partOfSpeech value="noun"/></pE:tig></pE:langSet></pE:termEntry></term-sec><term-sec id="sec_3.15"><label>3.15</label><pF:termEntry xmlns:pF="urn:iso:std:iso:30042:ed-1" id="term_3.15"><pF:langSet xml:lang="en"><pF:definition>material which is used or is representative of that used, immediately beneath a surface product in end-use</pF:definition><pF:example>Skimmed plasterboard beneath a wall-covering.</pF:example><pF:tig><pF:term>substrate</pF:term><pF:partOfSpeech value="noun"/></pF:tig></pF:langSet></pF:termEntry></term-sec><term-sec id="sec_3.16"><label>3.16</label><p10:termEntry xmlns:p10="urn:iso:std:iso:30042:ed-1" id="term_3.16"><p10:langSet xml:lang="en"><p10:definition>existence of flame on or over the surface of the specimen for periods of more than 4 s</p10:definition><p10:tig><p10:term>sustained flaming</p10:term><p10:partOfSpeech value="noun"/></p10:tig></p10:langSet></p10:termEntry></term-sec><term-sec id="sec_3.17"><label>3.17</label><p11:termEntry xmlns:p11="urn:iso:std:iso:30042:ed-1" id="term_3.17"><p11:langSet xml:lang="en"><p11:definition>existence of flame on or over the surface of the specimen for periods of between 1 s and 4 s</p11:definition><p11:tig><p11:term>transitory flaming</p11:term><p11:partOfSpeech value="noun"/></p11:tig></p11:langSet></p11:termEntry></term-sec><term-sec id="sec_3.18"><label>3.18</label><p12:termEntry xmlns:p12="urn:iso:std:iso:30042:ed-1" id="term_3.18"><p12:langSet xml:lang="en"><p12:definition>progression of the flame front in a lateral direction over the specimen width</p12:definition><p12:tig><p12:term>lateral flame spread</p12:term><p12:partOfSpeech value="noun"/></p12:tig></p12:langSet></p12:termEntry></term-sec><term-sec id="sec_3.19"><label>3.19</label><p13:termEntry xmlns:p13="urn:iso:std:iso:30042:ed-1" id="term_3.19"><p13:langSet xml:lang="en"><p13:definition>progress of the flame front in a vertical direction (upwards or downwards) over the specimen height</p13:definition><p13:tig><p13:term>vertical flame spread</p13:term><p13:partOfSpeech value="noun"/></p13:tig></p13:langSet></p13:termEntry></term-sec></sec>
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