This is a <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestop</a> drawing, intended to accompany a <a rel="nofollow" class="external text" href="http://ahering.webs.com/07840_master_spec.htm">firestop specification section 07840</a>, which shows through-penetrations that require firestopping, mechanical, electrical or structural in nature, in a in <b><a href="//commons.wikimedia.org/wiki/Drywall" title="Drywall">drywall</a></b>  assembly required to have a <a href="https://en.wikipedia.org/wiki/en:Fire-resistance_rating" class="extiw" title="w:en:Fire-resistance rating">fire-resistance rating</a>; <a href="https://en.wikipedia.org/wiki/de:Brandrate" class="extiw" title="w:de:Brandrate">German: Brandrate</a>. For mechanical through-penetrations (e.g. pipe) the <a href="https://en.wikipedia.org/wiki/en:Certification_listing" class="extiw" title="w:en:Certification listing">certification listing</a> may allow the <a href="//commons.wikimedia.org/wiki/Thermal_insulation" title="Thermal insulation">pipe insulation</a> to penetrate through the <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestop</a>, or it may have to butt up to the firestop. Determining factors are found in the bounding of the certification listing.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>