Hi - I am hoping for some advice on my 1920's 1-1/2 story home.
We have a beam in my basement spanning approximately 26 feet. The beam is a 2-2x8 with the joists nailed directly to it (not sitting on top). The beam then has a 2x8 footer board nailed underneath it. The supported distance is about 13' on each side of the beam. The ends of the beam are supported by the basement walls, and there are 2 posts supporting the beam. Post #1 is approximately 12 feet from one end, while post #2 is about 7 feet from the other end. I would like to know if I could remove post #2, and then sister up another beam from the end of the original beam to the remaining post. This would give me an open span of about 14 feet on one side of the remaining post (now with a double beam) and a clear span of about 12' on the other side of the remaining post (which would basically remain as it is today. I want to know how big the beam would need to be to do this. The basement has uncommonly high ceilings for a house of this era (8') so a support beam dropping into the open space is not a big deal as long as it is not too big, or I don't have basketball players over to the house :)
Additional information: I live in SE Michigan, and the home is essentially a 1-1/2 story (walk in attic and two small bedrooms upstairs). Full basement, asphalt roof.
Any help or advice is greatly appreciated. Thanks!