<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause xmlns:xt="urn:xpressauthor:trackchanges" id="_8fe0437a-ef2c-4700-bf11-f7d6326ff94f" outputclass="ncc-clause"><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>F7D5</sptc><title id="_33ccbacb-deca-4bff-b31a-e06543479e99">Sound insulation rating of floors</title><archive-num>2019: F5.4</archive-num><subclause id="_beaaf5a1-2f11-4eac-a07e-d7265d581a7f" outputclass="subclause"><title id="_cdee8f7e-9e58-4da3-bbc8-aa5c8f5a9715">SubClause</title><num>1</num><p>A floor in a Class 2 or 3 building must have an R<sub id="_72a9fcac-defd-4a50-a415-c09bfb6f6332">w</sub> + C<sub id="_b4c98405-be3e-4c3e-a03f-0de417dc920f">tr</sub> (airborne) not less than 50 and an L<sub id="_3424f432-8c6d-421b-add6-70c0901d0f4d">n,</sub><sub id="_e821997a-8da7-4c37-b8de-7ef1f2c48ec1">w</sub> (impact) not more than 62 if it separates—</p><ol outputclass="alpha"><li id="_d6a5a61a-8872-42cf-9c33-4ccbeb860333"><xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1473_0.4.0.xml#_d2c89488-8a36-464b-94f6-a91d0f5a6c9c" id="_7804c65b-d25a-4924-b7a9-173e2362a3c8" scope="local" type="abcb-glossentry">sole-occupancy units</xref>; or</li><li id="_8ef5b9ed-b9dd-4e3e-a2c6-0cda5a53dd83">a <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1473_0.4.0.xml#_d2c89488-8a36-464b-94f6-a91d0f5a6c9c" id="_0ed666fe-6e22-48cf-b506-ce884dd65887" scope="local" type="abcb-glossentry">sole-occupancy unit</xref> from a plant room, lift <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1459_26.0.0.xml#_99391afe-5794-47e4-94ab-7e9e7a83740a" id="_e98ff54e-ff46-4ff7-a021-75fa241539dc" scope="local" type="abcb-glossentry">shaft</xref>, stairway, <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1419_4.0.0.xml#_eea79623-bc7d-4ef1-b787-8452b6383ffc" id="_7ffc5f99-bcc5-4f85-b4fa-4805d4846fb6" scope="local" type="abcb-glossentry">public corridor</xref>, public lobby or the like, or parts of a different classification.</li></ol></subclause><subclause id="_68bff972-1ce9-47ad-b565-042a30e9e10d" outputclass="subclause"><title id="_50bd299f-e3e9-4261-9094-d5b6f340eb83">SubClause</title><num>2</num><p>A floor in a Class 9c building separating <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1473_0.4.0.xml#_d2c89488-8a36-464b-94f6-a91d0f5a6c9c" id="_48d14d3c-2918-40a7-ae16-0ad783edef3c" scope="local" type="abcb-glossentry">sole-occupancy units</xref> must have an R<sub id="_7306fb9a-7263-49d0-99dd-687408d417b5">w</sub> not less than 45.</p></subclause></clause>