<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause xmlns:xt="urn:xpressauthor:trackchanges" id="_d2cc4a1e-911f-4014-80fb-fea43a03e480" 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>S28C8</sptc><title id="_c76dbef0-5090-4e16-831f-be328158e14a">Acceptable forms of construction for floors — concrete</title><archive-num>2019: Spec F5.2: Table 3</archive-num><subclause id="_67ce85a1-8285-46d9-9346-ea4dd7ae80ec" outputclass="subclause"><title id="_4d8e7fba-7658-4c46-853e-a87b0502826a">SubClause</title><num>1</num><p>Acceptable forms of construction for concrete floors are set out in (2) to (4).</p></subclause><subclause id="_4172cbd8-295e-4960-8f8f-2fe1a86a44e6" outputclass="subclause"><title id="_61621309-1780-4b01-90b6-d6ee8e12978a">SubClause</title><num>2</num><p>150 mm thick concrete slab with—</p><ol outputclass="alpha"><li id="_6c23eefc-25da-4ed8-990e-672eb9e45618">28 mm metal furring channels and isolation mounts fixed to underside of slab, at 600 mm centres; and</li><li id="_772b645a-71d5-4070-9015-bfd8d1f0d045">65 mm thick polyester insulation with a density of 8 kg/m<sup id="_b66d65c9-8fa8-4a9a-ba57-8e933d54ed27">3</sup>, positioned between furring channels; and</li><li id="_fd5ec26f-3081-4c15-ac69-3e11d0642ef0">one layer of 13 mm plasterboard fixed to furring channels,</li></ol><p>has an R<sub id="_f93d68ea-5a23-4b37-a572-27e133740aaa">w</sub> + C<sub id="_fa5c3eda-4712-41c1-b2ce-6d02427a4984">tr</sub> of not less than 50, an L<sub id="_9cbdbbbf-5511-4868-82ba-08f1baa0fee1">n,w </sub>of not more than 62 and an R<sub id="_9f87a49b-27b5-4cb2-a4cc-93528ee8a196">w</sub> of not less than 50, if constructed as shown in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/520_0.6.0.xml#_4e4efd58-c421-47f6-a672-775254052a5a" id="_e034d8c5-be15-453e-885e-3d39281e33b5" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S28C8a</xref>.</p></subclause><subclause id="_316c81c0-a5d8-4338-a569-c586ad35ef95" outputclass="subclause"><title id="_32719eb5-f65a-4693-9d45-83b36ee93b8e">SubClause</title><num>3</num><p>200 mm thick concrete slab with carpet on underlay has an R<sub id="_36d55ff5-f75e-4da2-a634-9a3ffecb61ef">w</sub> + C<sub id="_b16fe411-eeba-462d-ac4a-e5c4e9fc4564">tr</sub> of not less than 50, an L<sub id="_8f1b6da5-5c64-415f-bbd1-fd08d0ab7ed5">n,w</sub><sub id="_3f80d14d-262b-44ef-a6c7-68fb8853f088"> </sub>of not more than 62 and an R<sub id="_77e55481-bb94-4c74-b144-81a62b862cd6">w</sub> of not less than 50, if constructed as shown in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/522_0.5.0.xml#_6695f5bf-097d-4a83-a5ef-406fa88f8816" id="_1086bfef-c492-4579-8b7c-c49a4bf55108" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S28C8b</xref>.</p></subclause><subclause id="_397af232-9131-4f2f-8d0c-ccb94ec548ad" outputclass="subclause"><title id="_93eae48c-6453-4a33-a016-77e466cd5e95">SubClause</title><num>4</num><p>100 mm thick concrete slab has an R<sub id="_26796b1b-fb2e-4030-af4f-a81d53c4e2fd">w</sub> + C<sub id="_fde80283-f7f3-4063-a501-d82af22127d7">tr</sub> of not less than 45 and an R<sub id="_368544cf-8030-4d93-81ff-5d5666ba0e0a">w</sub> of not less than 45, if constructed as shown in <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/525_0.5.0.xml#_47d6dd31-adfd-4177-a761-185a5b011064" id="_fc355610-a123-42a5-afa2-b76f2f973041" referencetype="Text" scope="local" synctargettext="false" type="image-reference">Figure S28C8c</xref>.</p></subclause><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/520_0.6.0.xml" id="_4e4efd58-c421-47f6-a672-775254052a5a"><num/><title id="_b52f940e-d8a7-4438-bcb0-41c1e0dc8c08"/></image-reference><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/522_0.5.0.xml" id="_6695f5bf-097d-4a83-a5ef-406fa88f8816"><num/><title id="_20d10300-f6d1-4948-a82e-f85f5e3188ca"/></image-reference><image-reference conref="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/525_0.5.0.xml" id="_47d6dd31-adfd-4177-a761-185a5b011064"><num/><title id="_320bff61-9a25-476d-8240-8d112a57ab3a"/></image-reference></clause>