Sag. Case of the droopy drywall. USG stuff only has drawings for approved 1 hr assemblies in wood frame on 16 OC, not 24.
Fire rating question.
I was on another forum and this guy was saying that 5/8" drywall loses its 1 hour fire rating if it is put on a ceiling with 24" OC. Why would this be? Or is it not?
1 - 9 of 9 Posts
Now I'm just being curious.
What would be required to get a 1 hour fire rating using 5/8", 2 sheets thick?
I have heard of ceiling board which is stiffer and designed for 24 OC. Does it come in a 5/8" and would it have the fire rating?
What would be required to get a 1 hour fire rating using 5/8", 2 sheets thick?
I have heard of ceiling board which is stiffer and designed for 24 OC. Does it come in a 5/8" and would it have the fire rating?
I prefer this site ... http://www.nationalgypsum.com/resources/Selector/default.aspx
5/8 drywall studs, insulation, 5/8 drywall.....equals 1 hr fire rating.
I always use 5/8s in all my ceiling repairs then coat tham with 1/8" Durabond 90 and the 1/8" topping, I wonder if this raises the rating.
No, because to get a fire rating the system being used has to beI always use 5/8s in all my ceiling repairs then coat tham with 1/8" Durabond 90 and the 1/8" topping, I wonder if this raises the rating.
tested and approved.
We had the option of either double 5/8" X on 16" centers framing, or using metal track with one layer of 5/8" X. That was several years ago, things may have changed.:thumbsup:Now I'm just being curious.
What would be required to get a 1 hour fire rating using 5/8", 2 sheets thick?
How can you get a 1 hour rating with 1 layer of 5/8 type X, when you get 20 minutes for 1 layer of 5/8 type x, and 20 minutes for the stud?We had the option of either double 5/8" X on 16" centers framing, or using metal track with one layer of 5/8" X. That was several years ago, things may have changed.:thumbsup:
1 - 9 of 9 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Contractor Talk - Professional Construction and Remodeling Forum
A forum community dedicated to professional construction and remodeling contractors. Come join the discussion about the industry, trades, safety, projects, finishing, tools, machinery, styles, scales, reviews, accessories, classifieds, and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
