nealderidder
Sawhorse
Hello all,
I've got an existing four story commercial building I want to put some holes in. It's a poured-in-place concrete building so I'm OK with the required 1HR floor/ceiling ratings that are required.
The new holes are in the floors to allow a two-story "atrium" space between 1st and 2nd. To get light into that new "atrium" I also want to open up 3rd and 4th and the roof and plop a skylight on the top (see sketch).
Those dashed lines you see in the light wells would ideally be non-rated strorefront with fire shutters (Like an McKeon coiling door). I believe these "light wells" would be considered "shafts" per CBC 713 (yep, California 2019 code) and need a 2 HR rating.
My questions for you fine folk:
1. Is the space that includes the 1FL and 2FL an "atrium" and is it a two-story atrium?
2. Are the Light wells a "shaft" and are they connecting four floors?
3. Do you see any issues with using fire shutters to reach the 2HR shaft rating requirement in the light wells?
Any insight would be appreciated!
I've got an existing four story commercial building I want to put some holes in. It's a poured-in-place concrete building so I'm OK with the required 1HR floor/ceiling ratings that are required.
The new holes are in the floors to allow a two-story "atrium" space between 1st and 2nd. To get light into that new "atrium" I also want to open up 3rd and 4th and the roof and plop a skylight on the top (see sketch).
Those dashed lines you see in the light wells would ideally be non-rated strorefront with fire shutters (Like an McKeon coiling door). I believe these "light wells" would be considered "shafts" per CBC 713 (yep, California 2019 code) and need a 2 HR rating.
My questions for you fine folk:
1. Is the space that includes the 1FL and 2FL an "atrium" and is it a two-story atrium?
2. Are the Light wells a "shaft" and are they connecting four floors?
3. Do you see any issues with using fire shutters to reach the 2HR shaft rating requirement in the light wells?
Any insight would be appreciated!