<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause xmlns:xt="urn:xpressauthor:trackchanges" id="_d47609dd-0a09-4587-802d-9e95df14f2cf" 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>S28C10</sptc><title id="_d8e8338e-cbd2-46b9-826c-2f79e426706c">Acceptable forms of construction for floors — timber</title><archive-num>2019: Spec F5.2: Table 3</archive-num><subclause id="_315f74c8-b784-4640-ad48-5df096435b80" outputclass="subclause"><title id="_2aadfa24-e6e3-45ca-b775-4ec309aa9a97">SubClause</title><num>1</num><p>Acceptable forms of construction for timber floors are set out in (2) and (3).</p></subclause><subclause id="_354c9425-588d-4011-b92d-7823fbad7842" outputclass="subclause"><title id="_9f75b2f2-ae27-4679-aae8-d0098692e58d">SubClause</title><num>2</num><p>19 mm thick particleboard floor sheeting with—</p><ol outputclass="alpha"><li id="_9d73b979-0efd-46c4-8c5c-5d0514bac96a">190 mm x 45 mm timber joists at 450 mm centres; and</li><li id="_de0a3e2b-2a52-4313-9d5e-f6531c191d07">R2.5 glass or mineral wool insulation positioned between timber joists; and</li><li id="_57d9889e-bd19-4a15-9afb-cab5bb084e8b">28 mm metal furring channels and isolation mounts fixed to underside of joists, isolation mounts to be of natural rubber with a dynamic factor of not more than 1.1 and static deflection of not less than 3 mm at actual operating load; and</li><li id="_2402bbcc-f749-40a7-ae00-06278eebe392">two layers of 16 mm fire-protective grade plasterboard fixed to furring channels,</li></ol><p>has an R<sub id="_71b20ac4-da22-402e-bb7c-ababa067135f">w</sub> + C<sub id="_27d668c6-5e6e-4f6c-8462-bf25b741ccf6">tr</sub> of not less than 50, an L<sub id="_1e8c8e0e-5c39-4121-b211-f33a7d9998e1">n,w</sub><sub id="_1a4af775-6593-4ee8-ab6a-cbb834a0a215"> </sub>of not more than 62 and an R<sub id="_7ce81dae-26ee-4672-9496-363702fc8a08">w</sub> of not less than 50, if constructed as shown in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/527_0.8.0.xml#_cfc8e858-10f8-4e28-b746-91dab091be6f" id="_ab7de32d-aee8-4338-95b8-717cb12e754e" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S28C10a</xref>.</p></subclause><subclause id="_f78a5cb5-3fd2-4e38-b7e5-b16947428825" outputclass="subclause"><title id="_87f5c060-9be4-4d43-b853-28265a2e7683">SubClause</title><num>3</num><p>Timber flooring with minimum 8.5 kg/m² mass, over 19 mm thick particleboard floor sheeting with—</p><ol outputclass="alpha"><li id="_df92f0b9-ee0a-4e94-8896-30c7c629909a">190 mm x 45 mm timber joists at not less than 450 mm centres; and</li><li id="_c789a0f6-b7f3-42f9-b51c-4e783d4bfe8a">R2.5 glass or mineral wool insulation positioned between timber joists; and</li><li id="_f43e1420-6d19-4458-a6cf-e5baf40cfcb3">28 mm metal furring channels fixed to underside of joists at 600 mm centres by clip or mount; and</li><li id="_26e20d01-fdce-4121-ba13-4a1bd1a35862">one layer of 13 mm acoustic grade plasterboard fixed to furring channels,</li></ol><p>has an R<sub id="_63850dea-b1d8-4e79-9bc5-077d16c82177">w</sub> + C of not less than 45 and an R<sub id="_3f897aff-ac92-4b40-a46e-eac5a1e5c982">w</sub> of not less than 45, if constructed as shown in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/4866_0.5.0.xml#_998fc78c-1c41-4eda-aea0-18ed3ce31151" id="_b619175d-1229-4b30-af8d-cd71aeca2bab" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S28C10b</xref>.</p></subclause><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/527_0.8.0.xml" id="_cfc8e858-10f8-4e28-b746-91dab091be6f"><num/><title id="_ef27d64d-4778-4cc2-aad1-15be17e976a2"/></image-reference><image-reference author="Brandon Kiem" conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/4866_0.5.0.xml" dateTime="2021-03-09T13:36:41" id="_998fc78c-1c41-4eda-aea0-18ed3ce31151" type="insert"><num xt:author="Brandon Kiem" xt:dateTime="2021-03-09T13:36:41" xt:type="insert"/><title id="_9e0c54ba-f0d2-47a1-9cc8-b0b13407a8bf" xt:author="Brandon Kiem" xt:dateTime="2021-03-09T13:36:41" xt:type="insert"/></image-reference></clause>