Approval number for 1-hour wall (7/8" stucco & 5/8" type x)

[dshall 1499]

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

 

[DRAWZILLA 779]

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. 

[dshall 1499]

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).

 

 

[DzinEye 265]

Realized you're not talking about garage separation...

[DzinEye 265]

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

[Chief16Designer 12]

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 

[Alaskan_Son 2465]

The real question here in my mind is:  What even is an “approval number”?

[dshall 1499]

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. 

 

[dshall 1499]

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 ,

[rlackore 403]

Maybe this could satisfy the inspector:

https://stuccomfgassoc.com/wp-content/uploads/2020/06/One-Hour-Fire-Walls-Wood-2020.pdf

[DzinEye 265]

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... 

[builtright3 107]

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!

[builtright3 107]