I have a sinking first floor, between my living and dining room. Now, I understand that some type of beam or support may be necessary in the basement across this area, and slowly screwed up, a little at a time. But in that area I have a hanging heater duct and fairly low head clearance to but a beam. Are there any other options for support. Guess the builders of the 50yr old home didn't expect this to be a load bearing wall/floor.