My question is for both load and non-load bearing walls.
There used to be a hinged door between the kitchen and dining room, who knows when it was removed (I've been here a couple years). The door frame is still intact. The opening is roughly 6'8" high and I'd like to know if I can extend this opening all the way up to the 8' ceiling.
For the second situation, I have a small hall that ends in a T-intersection where you need to turn left or right towards bedrooms. This might be part of a load-bearing "line" of the house, for my question lets assume it is. Similarly, can I remove the wall above this opening such that the passageway opening goes straight up to the ceiling?
I'm unclear on what the header, king, and jack requirements are for a passageway that has no door attached.