<?xml version="1.0" encoding="UTF-8" standalone="no"?><image-reference xmlns:xt="urn:xpressauthor:trackchanges" id="_48a01903-c64b-4cd0-abfa-2d2b935416dc"><num>11.3.4a</num><title id="_2f9f50c3-76c1-419b-a19e-850ed2f782f2">Barrier construction</title><image alt="Barrier construction" height="651" heightdpi="200" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/11-3-4a-barrier-construction.svg" width="1200" widthdpi="200"/></image-reference>