Previous in Forum: ECM X13 Motors   Next in Forum: Corten Steel
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
4 comments
Rate Comments: Nested
shawdog2
Active Contributor

Join Date: Jun 2009
Posts: 14

Calculating Fire Wall Resistance

11/04/2009 1:41 PM

How do I calculate the fire rating of an existing wall? The wall consists of 2x6 studs with insulation. On one side is 1" of sheetrock. On the other side is 1-1/4" of wood siding with 3/4" plaster over it. This produces an overall wall width of 8-1/2". I need a two-hour minimum fire rated wall.

The sheetrock gives 40 minutes, and the plaster 50 minutes.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: Calculate wall fire resistance

11/04/2009 1:46 PM

http://ulstandardsinfonet.ul.com/scopes/0263.html
Register to Reply
ozzb
Guru
Hobbies - Fishing - Old Salt Hobbies - CNC - New Member United States - US - Statue of Liberty - New Member

Join Date: Mar 2007
Location: Rosedale, Maryland USA
Posts: 5197
Good Answers: 266
#3
In reply to #1

Re: Calculate wall fire resistance

11/04/2009 1:53 PM

http://www.awc.org/Publications/dca/dca3/index.html#Table2

__________________
 Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Register to Reply
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#2

Re: Calculate wall fire resistance

11/04/2009 1:50 PM

One could pore over the UBC and IBC tables for a considerable time, and you would not find that particular construction listed as a fire resistive barrier. In other words, that construction is not a 'Fire Wall'.

post script: "Sheetrock" is a registered trademark of the United States Gypsum Corporation. Generic term for the product is Gypsum Drywall or Wallboard. Sheetrock is a generic term often used (compare with 'Kleenex') to represent the material, but USG is known for vigorous protection of their trademark.

__________________
 Semper Ubi Sub Ubi
Register to Reply
bwire
Guru
Popular Science - Weaponology - bwire Hobbies - Car Customizing - New Member

Join Date: Dec 2007
Location: Upper Mid-west USA
Posts: 7498
Good Answers: 97
#4

Re: Calculating Fire Wall Resistance

11/04/2009 11:58 PM

two hour firewall

or dbl layer of 5/8" type "X" drywall screwed to studs and tape/mudded

__________________
 If death came with a warning there would be a whole lot less of it.
Register to Reply
Register to Reply
Have a Different Question?
4 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); bwire (1); Doorman (1); ozzb (1)

Previous in Forum: ECM X13 Motors   Next in Forum: Corten Steel

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (86 right now)
Show Members
Advertisement