Table r404 4 1 takes a 5 5 icf basement wall up to 10 0 but you re not bound by this if you use aci.
How thick is basement concrete wall.
Design strength of the concrete concrete blocks and mortar are very important.
As soon as you go higher or have greater depths of soil pushing against the wall you need to increase the thickness to 10 inches.
Drill holes to allow the vac system to draw from both rooms until you have a large vent hole.
Poured concrete foundation walls that are less than 8 feet tall and have soil outside that is 6 or 7 feet deep against the wall can often be 8 inches thick and function quite well.
There are many variables which control overall strength of masonry or poured concrete basement foundation walls.
Table 4a is based directly on the aci method but for table 4b the author has applied a reduced strength reduction factor a factor of safety.
This was 9 or 10 years ago.
Irc r404 4 refers icf design to aci if not using their tables.
Increasing the strength of the concrete mix or the thickness of the wall increases the wall s capacity.
Tape a one foot by one foot square of plastic sheeting plastic kitchen wrap will do to the concrete wall in your basement with duct tape and leave it in place for 24 hours.
The gas powered concrete saws really do a fast job but the dust is abundant.
The thickness of the wall with regard to its height is also extremely important.
I still find dusty things in he basement.
When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.
Irc has a lot of prescriptive stuff on icf walls.
Maybe even two rooms one on each side of the wall if it is into another room.
Ibc 1909 6 1 limits a structural plain concrete basement wall to 7 5 but that s not your situation.
In general poured concrete basement walls that are 8 feet tall or less and have no more than 7 feet of soil pressing against them from the outside function well at a thickness of 8 inches.