<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_d16d0439-6fd9-4c9f-9842-c021d90ead34" outputclass="ncc-clause"><sptc>S2C11</sptc><title id="_0690bd7c-a864-411b-8dd9-ba3d644f78b9">Hollow units</title><archive-num>2019: Sch. 5 (Annex): 3.2</archive-num><subclause id="_5006d0ba-1e44-4e0c-8347-2037ac188a52" outputclass="subclause"><title id="_ed2c6231-8717-4d2a-b8ae-f30702264c69">SubClause</title><num>1</num><p>For masonry in which the amount of perforation or coring of the units exceeds 25% by volume (based on the overall rectangular shape of the unit) the thickness of the wall must be calculated from the equivalent thicknesses of the units and the specified thickness of the joints between them as appropriate.</p></subclause></clause>