Send us Fan MailWe replay a practical guide to firestop selection and explain why the right choice starts with the barrier, the penetration, and the tested UL system. We break down mechanical and non-mechanical firestop systems so you can seal penetrations correctly, support future cable adds, and avoid costly code violations. • four selection factors: assembly type, barrier construction, penetrants, sealing method to restore rating • mechanical firestop systems for vibration and shock tolerance • cable transit systems and how inserts compress around cables • fire-rated pathways for easy moves adds and changes • factory fabricated sleeves, bushings, mineral wool, and AHJ approval • non-mechanical options: putty, firestop caulk, cementitious materials, pillows, bricks, blankets • firestop properties: intumescent expansion, endothermic heat absorption, ablative char formation • why grout and plaster crack and fail as firestopping • membrane penetrations versus through penetrations with real examples • annular space limits and why too much or too little material fails • seven jobsite tips: follow UL drawings, never mix materials, label and document, watch curing hazards and fumes If you're watching this show on YouTube, would you mind hitting the subscribe button and the bell button to be notified when new content is being produced? If you're listening to us on one of the audio podcast platforms, would you mind leaving us a five-star rating? Would you mind clicking on that QR code right there? You can become a Patreon member, you can buy Let's Talk Hilling t-shirts and support this podcast Support the showKnowledge is power!  Make sure to stop by the webpage to buy me a cup of coffee or support the show at https://linktr.ee/letstalkcabling .  Also if you would like to be a guest on the show or have a topic for discussion send me an email at [email protected] Chuck Bowser RCDD TECH#CBRCDD #RCDD