<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_4261168a-266e-4936-8b73-ee682a879b5d" 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>S31C17</sptc><title id="_d37d8d37-4020-406a-8bff-90240c377909">Smoke detection in spaces separated from the atrium by bounding walls</title><archive-num>2019: Spec G3.8: 4.3</archive-num><subclause id="_8a66dd2f-0fd3-47ee-9b15-76b8fef16e3e" outputclass="subclause"><title id="_397baba7-d65e-4d26-b35e-6b4edaae1d3a">SubClause</title><num>1</num><p>Smoke detection systems must be located at all return and relief air openings associated with the building air-handling systems and be—</p><ol outputclass="alpha"><li id="_3356bde7-53af-4690-9f3e-1fdbc23d43a6">of the sampling type system as <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_86b71b0a-5d5b-410b-ace6-4ac069367a62" scope="local" type="abcb-glossentry">required</xref> in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/832_9.4.0.xml#_f7dbb28c-dc59-430b-9dd8-8dc4c95b9032" id="_9bb442c8-d290-4018-bb9c-989d2b3b0b6d" scope="local" type="clause">S31C16</xref>; or</li><li id="_ee4c3149-2341-4f57-ad7e-6586b20c5bc8">of the point type photoelectric smoke detector.</li></ol></subclause></clause>