I am planning to run CAT6 from the basement to the attic through the first and second floor of my 1905 wood house (renovated some time in the last 20-30 years). Location is Seattle.
There's an existing structured media cutout on the second floor used for CAT3 phone that runs into the attic and off to various spots that I plan to hijack and use to pull new stuff once I get all the lines into the attic from the basement. Assuming they aren't stapled down. 😬
The CAT3 comes into the house from the left exterior wall and (probably) runs up the wall into the attic and down into the cutout.
Aside from exterior walls, the only wall that is shared by all levels is the interior stairwell. My plan is to build out a cabinet under the basement stairs.
My question: what sort of structure will I find in the stair walls for this era of house (as best as one can reasonably predict)? I'm trying to understand what I have to drill through and what I will have to avoid.
Floor plans are mostly to scale, still a work in progress.
The first floor wall seems to be cantilevered on the basement wall (first sits offset left of basement by 4-5 inches).