<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_f6bdcba8-108b-495e-9ae6-05becbc311de" outputclass="ncc-clause" variation="NT"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 4"/><facet building="Class 5"/><facet building="Class 6"/><facet building="Class 7a"/><facet building="Class 7b"/><facet building="Class 8"/><facet building="Class 9a"/><facet building="Class 9b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>F7D3</sptc><title id="_dc4b5b6f-3eb5-4196-a0f7-2bf89eb25035">Weighted sound reduction index: interpretation</title><archive-num>2019: NT F5.2</archive-num><subclause id="_7b174241-97ae-4590-8767-ca4ab4aa4e5e" outputclass="subclause"><title id="_700c5f6e-b386-4239-a852-2a722b803d0f">SubClause</title><num>1</num><p>A form of construction <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_be796532-8f6e-4e86-a4e3-2e3f46634bab" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">required</xref> to have a certain weighted sound reduction index (R<sub id="_cba1e13f-c764-4f53-bb74-033c14c1d8c6">W</sub>) must—</p><ol outputclass="alpha"><li id="_969e6922-793d-4eaa-89ea-2caa9bc9350d">have the <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_e968dd4c-33cf-4629-8278-0fe8e85c0890" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">required</xref> value determined under AS/NZS ISO 717.1; or</li><li id="_033c8c08-c58d-4f05-955d-ad834927402e">comply with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/7020_0.3.0.xml#_fdef7580-a285-4189-a102-f8abf419cc65" id="_0afc452a-1a6a-4ea2-ac08-0d0251fea5d7" referencetype="Text" scope="local" synctargettext="false" type="specification">NT Specification 28</xref>.</li></ol></subclause></clause>