ELLEN09US
Member
Hello everyone,
Is the construction type for CMU wall and wood roof type III?
Thank you!
Is the construction type for CMU wall and wood roof type III?
Thank you!
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Construction type
- Thread starter ELLEN09US
- Start date
Yikes
Gold Member
ELLEN90US, see table 601
Type III construciton requires minimum 2 hour rated walls.
IIIA requires a one hour roof structure.
IIIB has a 0 hour roof.
A building with CMU walls and a wood roof can be made to qualify as as Type III.
Note that per 602.1.1, you can still decide to call it a lower type of construction (such as Type V) if you want, even though it is made out of CMU.
Type III construciton requires minimum 2 hour rated walls.
IIIA requires a one hour roof structure.
IIIB has a 0 hour roof.
A building with CMU walls and a wood roof can be made to qualify as as Type III.
Note that per 602.1.1, you can still decide to call it a lower type of construction (such as Type V) if you want, even though it is made out of CMU.
ELLEN09US
Member
Thanks!
this is an existing building. I just want to put the info for the building.
So, it's type 5?
this is an existing building. I just want to put the info for the building.
So, it's type 5?
Get a copy of the CO from the AHJ.
ELLEN09US
Member
Thanks!
Builder Bob
Sawhorse
Depends -Type III B, if the exterior walls are two hour rated for bearing walls, then yes
If not - type V
If not - type V
steveray
SAWHORSE
Is it a heavy timber roof? Could be IIB....
Paul Sweet
Sawhorse
8" block will usually give you a 2-hour fire rating (IBC 722.3.2)
NCMA TEK 02-01B will give you the equivalent thickness. Also see NCMA TEK 07-01C for fire rating info.
https://ncma.org/resource-results/?type=tek
NCMA TEK 02-01B will give you the equivalent thickness. Also see NCMA TEK 07-01C for fire rating info.
https://ncma.org/resource-results/?type=tek
Builder Bob
Sawhorse
Assuming correctly grouted joints, reinforcement, and no holes polked thru - the problem we have is seismic, and until 2001 in SC, masonry was not constructed with seismic provisions - thus does not qualify.
Paul Sweet
Sawhorse
Grout will increase the equivalent thickness, and thus the fire resistance.