Unsealed through-penetrations in fire-resistance rated assembly at Cambrian College, Greater Sudbury, Ontario, Canada, August 2000. No <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestop</a> = 0 fire-resistance rating for the whole barrier. Penetrations such as these can be found by lifting ceiling tiles next to rated walls, such as those with fire doors in them.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
2007-07-04
<span class="int-own-work" lang="en">Own work</span>