I removed a load bearing wall between a small kitchen and tiny dining room. My problem is that I have a giant gap to fill in where the old wall was. The house was built in 1950 and sits above a crawl space. As depicted there is no underlayment where the original oak flooring is installed. The original framing was all "true 2x4" so new lumber doesn't quite do the trick.
The tiled area is about 3/8 higher than the wood and after filling the gap it will need a reducing transition installed. I do have 6" accent tile to cover the gap once the 1"deep x 4.5 wide gap has been filled in. The wood floor was resurfaced 4 years ago and the ends are all different lengths adjoining the gap.
I do have a table saw buried in the garage behind everything and no I couldn't cut a straight line with a circular saw if my life depended on it. At the moment the ends are not finished but merely four 2x4s stacked upright screwed together supporting the beam. I have a preexisting passageway 30" wide at one end that I intend to cover over with the trim tile so it is consistent over the length of the opening. Additional photos would have simplified my explanation but I was only able to upload 1 photo.
For a temporary measure I used a 1x4 to prevent turned ankles but now that the kitchen portion is tiled I need to come up with a permanent fix to level it out with the kitchen. I've got 21 linear feet to cover.
I've considered plywood + hardy backer + mortar / Masonite and fill to tile level with Quickcrete using foam rope against the hardwood side.