<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_99e0d215-7923-411f-a3f5-6115de407365" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>S21C2</sptc><title id="_fd09225d-bea4-47ea-9806-9eb4aea3cb75">Smoke exhaust capacity</title><archive-num>2019: Spec E2.2b: 2</archive-num><subclause id="_1100b51e-c6a7-42d7-b285-fa87f08e7c05" outputclass="subclause"><title id="_4a1a3e88-a642-46ac-a60a-f3f523f4d02e">SubClause</title><num>1</num><p>Smoke exhaust fans must have a sufficient capacity to contain the smoke layer—</p><ol outputclass="alpha"><li id="_0bed6350-ba41-4bb0-b5fe-59513ca243fc">within a smoke reservoir formed in accordance with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/681_8.2.0.xml#_9a6e93ca-9e95-45fd-a74f-499501450edc" id="_830d9ebc-4851-4dc8-9865-33ebf1652959" scope="local" type="clause">S21C4</xref> and not less than 2 m above the highest floor level; and</li><li id="_03ef134b-3dde-4d39-b368-0384567d6d42">above the top of any openings interconnecting different smoke reservoirs.</li></ol></subclause><subclause id="_f6e8a944-0117-4530-9b71-76c9efe57020" outputclass="subclause"><title id="_286768c2-f072-4999-9d96-72f80ff55e3a">SubClause</title><num>2</num><p>Exhaust rates must be determined in accordance with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/286_0.6.0.xml#_d082634b-ede1-45a8-8441-ab910035422c" id="_becec454-6279-4a9c-a875-a5d670f2922a" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S21C2</xref>, with the height measurement taken from the lowest floor level to the underside of the smoke layer and the <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1286_2.8.0.xml#_c6f00a2d-3f92-463d-8e6f-1f215ea421d5" id="_c0cf741f-8e00-4a65-a380-515c6a8ec29a" scope="local" type="abcb-glossentry">fire load</xref> determined in accordance with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/230_6.3.0.xml#_6b061710-5afc-4a6b-a0e0-1c6e58509d81" id="_5aab0adf-14b2-4799-bb50-722269ccfb53" referencetype="Text" scope="local" synctargettext="false" type="table-reference">Table S21C2</xref>.</p></subclause><table-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/230_6.3.0.xml" graph="None" id="_6b061710-5afc-4a6b-a0e0-1c6e58509d81"><num/><title id="_b2972fdd-010f-4d30-bad7-e05877b7e8e3"/></table-reference><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/286_0.6.0.xml" id="_d082634b-ede1-45a8-8441-ab910035422c"><num/><title id="_d080d127-4233-4877-beed-ce906168d4b5"/></image-reference></clause>