We worked for a builder about ten years ago that did something similar.
Floor joist no sill plate.
Guess they never heard of uplift.
You can remove the rotted wood and cut new sections to replace the old one.
Just the block cavities open to the conditioned space.
The main beam itself is held up by large support columns installed every few feet.
A sill plate or mudsill is the bottom horizontal member of a floor system to which vertical members floor joists are attached sill plates are usually composed of lumber in sizes of 2 4 2 6 2 8 and 2 10.
I don t see any evidence of rot on the joists.
If you have noticed that all of the floors in your home are sloping towards the center of the house this indicates there s something wrong with the main.
The floor joists and rim joists rest directly on the block wall.
Please for the love of god do not pour a concrete patio above the level of your foundation.
Secure the new rim joist with 16p nails.
It was 2x10 joists but no mudsill just sill seal.
You don t need to use galvanized nails here.
I was inspecting a 30 year old home the other day and noticed in the crawl that there were no sill plates on top of the concrete block foundation.
Said job leads to the following all caps admonition.
The floor supports did not look pressure treated but maybe the way they used to do things made this ok or the type of lumber that was used was more resistant to rot.
Sill plate repair replacement.
After the house was framed we would go in the basement and nail 2x4 s up on the bottom of the joists tight against the inside of the foundation.
There is no vapor barrier or covering of any type over the top of the block wall.
As i started to shopvac the cavities last night i noticed that there is no sill plate.
I had never seen this before but it appeared to be causing no issues.
I spent the last few days replacing a rotten sill plate the horizontal piece of wood that lies between the foundation and the floor joists.