<?xml version="1.0" encoding="UTF-8" standalone="no"?><image-reference id="_56dc3495-af30-4526-871d-f9f42f834f5d" variation="NT"><num>10.7.1t</num><title id="_ae153973-a50f-4a1f-b1ab-2e192b0ca82a">Ducts or other construction separating soil and waste pipes from units — plasterboard to achieve R<sub id="_329ef70d-c1df-4b1d-80f7-69327a7fdd98">W</sub> of 30 (method 1)</title><image alt="Ducts or other construction separating soil and waste pipes from units — plasterboard to achieve RW of 30 (method 1)" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/10-7-1t-ducts-or-other-construction-plasterboard-rw-30-1-NT.svg"/><desc-note id="_f84a6367-bf6c-4152-9921-009479eb51ee"><p>2 layers of plasterboard each 10 mm thick, fixed to timber studs not less than 75 mm x 50 mm and spaced at not more than 400 mm centres.</p></desc-note></image-reference>