<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_359b5ee7-46cd-455d-9446-8d2e479abfe2" outputclass="ncc-clause"><sptc>S2C18</sptc><title id="_ea2602e3-5ceb-4a09-a744-8e580e855495">Gypsum-perlite or gypsum-vermiculite plaster or metal lath — beams</title><archive-num>2019: Sch. 5 (Annex): 7.3</archive-num><subclause id="_7baa2caa-878e-445a-84db-b37922db0553" outputclass="subclause"><title id="_3e2ad258-46a7-4d46-b3a8-ba67aff844ab">SubClause</title><num>1</num><p>For the fire protection of steel beams with gypsum-perlite or gypsum-vermiculite on metal lath—</p><ol outputclass="alpha"><li id="_9fd4a8b9-ec2d-4b30-bfe8-ff284dbee965">the lath must be fixed at not more than 600 mm centres to steel furring channels and at least 20 mm clear of the steel; and</li><li id="_78b8c09d-817f-4257-947f-951e738999ef">the thickness of the plaster must be measured from the back of the lath.</li></ol></subclause></clause>