OK, here is the problem.
What I have is the second floor joists span front to aft a distance of 24ft, being supported about the middle, the joists are 2x10 roughly 16" OC. Some of these joists are spliced with an overlap of about 4-5 ft being centered about 2-5 ft from the exterior wall. As shown.
Additionally I have a spot where there is a case of odd framing best shown. What you are looking at is the second floor joists and the strange 'header'.
And the last location is very much like the second.
Now that you have an idea of the problem areas, what I am needing is a solution here. The best world would be some old official manual that shows framing repair options. If you know of any technical data that shows what is permissible in terms of old framing system repairs I'd appreciate it.