kach22i
Member
- Joined
- Mar 7, 2010
- Messages
- 5
Is this situation allowed?
Wood floor truss construction (20" deep) on pressure treated plate sitting on 10" poured concrete wall, with an adjacent 6" pour stem wall sitting on the same foundation wall (truss sits on notch/step). The sill plate height is near grade but not 8" above grade, that is if you count drained planters as grade, sidewalks, or covered and paved parking as grade.
The code seems to be the same for both residential and commercial construction, the code number is 2304.11.2.2 in IBC.
The 8" required to non-decay protected wood (our trusses) is supposed to be from "exposed earth", however the 6" (barrier) of foundation wall between the floor truss and earth seems to redefine this. The stud wall above actually sits on (not true platform construction) the 6" concrete second pour on top of the 10" pour.
We plan on damp proofing the wall, but I'm wonder if a true water proofing will be required.
I petitioned the project designer, the builder client, and civil engineer to lower the planter grade and avoid the entire issue, but they want to do it this way.
Anyone see a problem? The wood floor trusses will actually be below grade if the foundation wall is not considered a proper barrier from exposed earth.
When I see other buildings in this situation they use top bearing trusses to raise the plate or hollow concrete plank floors below and near grade.
I'm seeing a lot of gray area here, and need some opinions.
Wood floor truss construction (20" deep) on pressure treated plate sitting on 10" poured concrete wall, with an adjacent 6" pour stem wall sitting on the same foundation wall (truss sits on notch/step). The sill plate height is near grade but not 8" above grade, that is if you count drained planters as grade, sidewalks, or covered and paved parking as grade.
The code seems to be the same for both residential and commercial construction, the code number is 2304.11.2.2 in IBC.
The 8" required to non-decay protected wood (our trusses) is supposed to be from "exposed earth", however the 6" (barrier) of foundation wall between the floor truss and earth seems to redefine this. The stud wall above actually sits on (not true platform construction) the 6" concrete second pour on top of the 10" pour.
We plan on damp proofing the wall, but I'm wonder if a true water proofing will be required.
I petitioned the project designer, the builder client, and civil engineer to lower the planter grade and avoid the entire issue, but they want to do it this way.
Anyone see a problem? The wood floor trusses will actually be below grade if the foundation wall is not considered a proper barrier from exposed earth.
When I see other buildings in this situation they use top bearing trusses to raise the plate or hollow concrete plank floors below and near grade.
I'm seeing a lot of gray area here, and need some opinions.
