|
| | | Forum Newbie
Group: Forum Members
Last Login: Tuesday, May 18, 2010 10:03 PM
Posts: 3, Visits: 17 |
| That is my basic question. When penetrating drywall and concrete with EMT sleeves or low voltage cabling alone, when is Rockwool required? Anyone have any good links to proper firestopping procedures?
J
RCDD |
| |
| | | 
Forum Guru
Group: Forum Members
Last Login: Wednesday, January 11, 2012 10:05 AM
Posts: 80, Visits: 255 |
| | One of the most incorrectly performed tasks in this industry, in my opinion, is firestopping. For years I believed that it was okay to put some intumescent putty around and opening and it was fine. While that may have been a rated assembly in some of the instances, it was only one because I was lucky. By definition, Firestopping is "the process of installing "listed" fire rated barriers to reestablish the fire resistance rating of the barrier" (quoted from a slide in the firestopping portion of the Bicsi Technician class) The way to get a listed solution is to break out the manufacturer guide and install the complete system as shown so that the system can be expected to return the barrier to its original rating. This link to the Hilti website shows a pile of different listed assemblies: http://www.us.hilti.com/holus/page/module/techlib/teli_productreldocs.jsf?lang=en&selProdOid=435344&nodeId=-114925 You can tell that depending on what you are pentrating, what is doing the penetrating, and what the rating of the barrier being pentrated is has an incredible influence on how the fire rating of the barrier is restored. The drawings show that there are limitations on the number of cables that can be installed in the penetration, how much firestop must be installed, and how to fill the void between firestop material. Also, remember to label the assembly as well. I hope this helps. Sorry there isn't just one answer. |
| |
| | | 
Junior Member
Group: Forum Members
Last Login: Friday, October 29, 2010 3:54 PM
Posts: 15, Visits: 68 |
| lacaire (3/12/2010)
One of the most incorrectly performed tasks in this industry, in my opinion, is firestopping. For years I believed that it was okay to put some intumescent putty around and opening and it was fine. While that may have been a rated assembly in some of the instances, it was only one because I was lucky. By definition, Firestopping is "the process of installing "listed" fire rated barriers to reestablish the fire resistance rating of the barrier" (quoted from a slide in the firestopping portion of the Bicsi Technician class) The way to get a listed solution is to break out the manufacturer guide and install the complete system as shown so that the system can be expected to return the barrier to its original rating. This link to the Hilti website shows a pile of different listed assemblies: http://www.us.hilti.com/holus/page/module/techlib/teli_productreldocs.jsf?lang=en&selProdOid=435344&nodeId=-114925 You can tell that depending on what you are pentrating, what is doing the penetrating, and what the rating of the barrier being pentrated is has an incredible influence on how the fire rating of the barrier is restored. The drawings show that there are limitations on the number of cables that can be installed in the penetration, how much firestop must be installed, and how to fill the void between firestop material. Also, remember to label the assembly as well. I hope this helps. Sorry there isn't just one answer. I agree. I wanted to post another link. This is to the UL Online Certification Directory for Fire-resistance-rated Systems and Products: http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/fireressrch.html On that page, you'll want to click the link for "Through Penetration Fire Stop Systems", the search function is cumbersome, but if you start with a basic search, you get to a page where you can refine it. Doug
Doug Weis, RCDD, ESS |
| |
| | | Forum Guru
Group: Forum Members
Last Login: Thursday, January 05, 2012 8:49 AM
Posts: 73, Visits: 285 |
| | I agree with everyone above, but most wall penitrations involving sleeves is: 30% fill 1/2" bead of putty around sleeve on each side 1" thick of Minerial wool in each end 1" think of putty in each end Most Concrete Floor penitrations involving sleeves is: 30% fill 1/2" bead of putty around sleeve on each side 1" thick of Minerial wool on top or floor side 1" think of putty on top or floor side Again always check Manufactues WL-Listings
Thanks,Ron Leger, RCDD/OSP/ESS/RTPM(i) |
| |
|
|
