dshall 1499 Posted October 12, 2020 Hi Guys, Do you know of an Approval number for 1-hour wall (7/8" stucco & 5/8" type x on 2x4 @ 16). I know, we have been using this 1-hour wall since I was in diapers, but I have a plan reviewer who wants me to prove this and now I cannot the approval number, more busy work. Thanks 1 Share this post Link to post Share on other sites
DRAWZILLA 779 Posted October 12, 2020 That's the way I have done it also. Nobody has asked me to prove it though. Good luck with this one. Maybe you could make his car payment for a year or so as a sign of good faith. Share this post Link to post Share on other sites
dshall 1499 Posted October 12, 2020 Thanks P., I have searched the internet and there is no clear answer but I have been doing this for longer than I want to admit. I remember I had to prove it once before and I don't even remember what I did. Here is one approved assembly but it too is not super clear. (per IBC Table 720.1(2),Item 15-1.3). Share this post Link to post Share on other sites
DzinEye 265 Posted October 12, 2020 Realized you're not talking about garage separation... Share this post Link to post Share on other sites
DzinEye 265 Posted October 12, 2020 38 minutes ago, dshall said: (per IBC Table 720.1(2),Item 15-1.3). Yep, I think that's the one...but it's Table 721.1 You might place a call to the jurisdictions Fire Dept. plan checker... I usually find them to be very helpful Share this post Link to post Share on other sites
Chief16Designer 12 Posted October 12, 2020 2 layers of 5/8 drywall = 1 hr fire wall check on that most of the inspectors don't pay attention to the 1 or 2 layers 1 layers = 30 min Share this post Link to post Share on other sites
Alaskan_Son 2465 Posted October 12, 2020 The real question here in my mind is: What even is an “approval number”? Share this post Link to post Share on other sites
dshall 1499 Posted October 12, 2020 2 minutes ago, Alaskan_Son said: The real question here in my mind is: What even is an “approval number”? This is an example of what they are looking for: https://law.resource.org/pub/us/code/bsc.ca.gov/sibr/org.gypsum.GA-600-09.pdf. 1 Share this post Link to post Share on other sites
dshall 1499 Posted October 12, 2020 47 minutes ago, DzinEye said: Yep, I think that's the one...but it's Table 721.1 You might place a call to the jurisdictions Fire Dept. plan checker... I usually find them to be very helpful Yep, 721, thanks , 1 Share this post Link to post Share on other sites
rlackore 403 Posted October 12, 2020 Maybe this could satisfy the inspector: https://stuccomfgassoc.com/wp-content/uploads/2020/06/One-Hour-Fire-Walls-Wood-2020.pdf Share this post Link to post Share on other sites
DzinEye 265 Posted October 12, 2020 https://www.cement.org/docs/default-source/stucco/eb049.pdf?sfvrsn=540de3bf_2 See page 29 ... but I can't locate the darned document it refers to. This all used to be prescribed in the UBC back in the day... Share this post Link to post Share on other sites
builtright3 107 Posted October 13, 2020 22 hours ago, dshall said: Hi Guys, Do you know of an Approval number for 1-hour wall (7/8" stucco & 5/8" type x on 2x4 @ 16). I know, we have been using this 1-hour wall since I was in diapers, but I have a plan reviewer who wants me to prove this and now I cannot the approval number, more busy work. Thanks 21 hours ago, DRAWZILLA said: That's the way I have done it also. Nobody has asked me to prove it though. Good luck with this one. Maybe you could make his car payment for a year or so as a sign of good faith. The problem is the plan checker is probably still in diapers! LOL I'm getting some very ridiculous corrections these days. I sure do miss the old days of drawing plans on a napkin for approval. However its good for the architect's to make money. All this red tape is another way to bleed money out of the people. California is the worst! Share this post Link to post Share on other sites