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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 /> Tenant walls in the World Trade Center towers: the original detail with rated ceiling strips (left) and the later requirement of a continuous barrier to the slab (right). Based on National Institute of Standards and Technology (2005), p. 56.<br /> <br /> Original vector illustration for [[Cavity barrier]], level 2 Intermediate.<br /> <br /> * Source basis: National Institute of Standards and Technology (2005), p. 56 (1 hour tenant walls, 10 ft strips of 1 hour rated ceiling, later requirement of a continuous barrier from floor to slab)<br /> * Alt text: Two sections of a tenant wall: left, wall ends at the suspended ceiling with rated ceiling strips; right, wall continues through the ceiling void to the slab.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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