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<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> Cavity barriers at each floor level in an external wall cavity (left) and a firestop in the slab edge gap of a curtain wall (right). Based on Ministry of Business, Innovation and Employment (2025b), pp. 47 to 48, and McAllister et al. (2008), p. 44.<br /> <br /> Original vector illustration for [[Cavity barrier]], level 2 Intermediate.<br /> <br /> * Source basis: Ministry of Business, Innovation and Employment (2025b), p. 47 (3.5 m vertical spread criterion, scenario VS) and p. 48 (paragraph 4.6.2.6, cavity barriers at each floor level); McAllister et al. (2008), p. 44 (firestop between floor slab and curtain wall on impaling pins); National Research Council of Canada et al. (2005), p. 1.6-6 (spaces behind exterior cladding as concealed spaces)<br /> * Alt text: Vertical section of an external wall over three floors with a ventilated cavity behind cladding, closed by a cavity barrier at each floor slab.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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