I recently purchased a fixer upper built in the 1930s in MA. The basement ceiling had lathe and plaster I removed so I can shove some insulation in. The removal has revealed a few joists in bad shape, and that they are notched. Apart from the three concerning joists, all the other ones are in pristine condition and all the bridges are intact.
The three joists are each concerning in different ways.
Joist #1 has been bored perpendicularly to fit a toilet (that I've removed). There's abviously some water staining there as well which will no longer be an issue. I think what I need here is to sister the joist locally:
joist #2 has a hairline split all the way through, but only on one side. The end of it is attached to a beam in a really funny way. I'm on the fence on whether this needs sistering or not, thoughts?:
Finally, joist #3, the one I'm most concerned about is cracked in two spots. One of the spots is cracked where there's a big knot. I'm pretty sure it shouldn't have been used in the first place because of the size of the knot. I think I need a pro to come and sister it the entire length:
So my question is, what kind of professional should I look to hire -- I know I need a carpenter, but do I need a structural engineer to come and look at it, or should I look for a carpenter that specializes in framing, or is this rather run-of-the-mill and any experienced carpenter will be able to do the job well?