Fire walls

[Rick 1956]

Looking in CBC 722. what is the rating of a hollow CMU wall. originally built circa 1950?

 

[mtlogcabin]

Click on the link and go to the Summary and click on masonry walls.

2018 INTERNATIONAL EXISTING BUILDING CODE (IEBC) | ICC DIGITAL CODES

ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures.

codes.iccsafe.org

 

[Sifu]

I use IBC 722.3 and t722.3.2. If you can't use the IBC, then maybe the attached document, using ASTM C140.

 

[Yankee Chronicler]

Looking in CBC 722. what is the rating of a hollow CMU wall. originally built circa 1950?

It depends on the thickness of the block and the weight of the block.

Look in the back of the IEBC. there is an extensive listing of the fire ratings for "archaic" building materials.

 

[mtlogcabin]

Archaic Materials are no longer in the 2021 IEBC. You will need to use the 2018 or later IEBC.

 

[Yankee Chronicler]

Archaic Materials are no longer in the 2021 IEBC. You will need to use the 2018 or later IEBC.

It's in mine. Resource A, at the very back of the book.

You can also contact The Masonry Institute for assistance, but you still need to know the thickness (width) of the wall and whether the blocks are lightweight, normal weight, or heavyweight CMUs.

 

[classicT]

It's in mine. Resource A, at the very back of the book.

You can also contact The Masonry Institute for assistance, but you still need to know the thickness (width) of the wall and whether the blocks are lightweight, normal weight, or heavyweight CMUs.

Are you looking at a version published by ICC? State amendment?

I do not see Resource A in the 2021 IEBC -> https://codes.iccsafe.org/content/IEBC2021P2

It is available in the 2018 IEBC -> https://codes.iccsafe.org/content/I...e-ratings-of-archaic-materials-and-assemblies

Or it makes a reappearance in the 2024 IEBC -> https://codes.iccsafe.org/content/I...e-ratings-of-archaic-materials-and-assemblies

 

[Yankee Chronicler]

Are you looking at a version published by ICC? State amendment?

I do not see Resource A in the 2021 IEBC -> https://codes.iccsafe.org/content/IEBC2021P2

It is available in the 2018 IEBC -> https://codes.iccsafe.org/content/I...e-ratings-of-archaic-materials-and-assemblies

Or it makes a reappearance in the 2024 IEBC -> https://codes.iccsafe.org/content/I...e-ratings-of-archaic-materials-and-assemblies

Well, that's interesting. I'm currently not in my office, and what I have available on-line is the 2021 IEBC, 1st printing, as downloaded from the ICC. We have the printed book in the office, and I'm fairly certain I have showed Resource A to applicants since we adopted the 21 I-Codes, but I can't be certain until I get back to the office.

It is definitely in the digital copy.

 

[classicT]

Well, that's interesting. I'm currently not in my office, and what I have available on-line is the 2021 IEBC, 1st printing, as downloaded from the ICC. We have the printed book in the office, and I'm fairly certain I have showed Resource A to applicants since we adopted the 21 I-Codes, but I can't be certain until I get back to the office.

It is definitely in the digital copy.

Interesting... I'm not sure why ICC does not have it published on their website as part of the 2021 IEBC.

 

[mtlogcabin]

I found it online in the 1st printing 12-2020.
However, it is not in the 2nd printing 4-2022

 

[Yankee Chronicler]

And it's back in the 2024 edition? That suggests the ICC screwed up the second printing for 2021.