<?xml version="1.0" encoding="UTF-8" standalone="no"?><image-reference id="_dc5d4ef5-9f43-4676-9a6e-913de6d5b1b2" variation="NT"><num>10.7.1h</num><title id="_ebdf68af-c0b4-4f2f-ba00-e217866ee827">Construction of walls to reduce impact sound and achieve a 50 R<sub id="_15ef07e0-0ee4-4738-b16e-e566530b06b7">W</sub>: steel stud walling (method 2)</title><image alt="Construction of walls to reduce impact sound and achieve a 50 RW: steel stud walling (method 2)" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/10-7-1h-construction-of-walls-50-rw-steel-stud-walling-2-NT.svg"/><desc-note id="_d9edb79e-b63b-48d7-803d-c2ef6af60127"><p>64 mm double metal studs (0.75 mm base meta thickness) at 600 mm centres with an air space not less than 20 mm between studs, in separate frames with no mechanical links, with—</p><ol outputclass="alpha"><li id="_bcf717b9-1707-471f-a4a9-22c412b64387">two layers of 13 mm fire-protective grade plasterboard to each side; and</li><li id="_13c4f57c-b4c5-4cb7-bc2f-b33ae6a22455">50 mm glass wool cavity batts.</li></ol></desc-note></image-reference>