i ripped out my bathroom and found what i was expecting: to enable the layout of fixtures, the previous owners, harm doers, cut large beam holes for plumbing, as a result of which they sagged some over time.
they are original 2x10 (the house was built in 1909) and they are 12 ft long (the narrower part of the house, fortunately). i was thinking of putting sisters that go from the wall to about the middle of the beams, where the wood looks solid. unadulterated beams look really solid but these three that i marked 1-3 are slightly sagged due to the harm done to them.
my questions was whether the above is the right approach or should i go all the way of the beam with sisters and which size sisters i should use (2x8 or the same as the beam).
it's amazing how much harm people can do to cut corners...
Those beams look pretty bad in the pictures. If you do not have solid wood next to the wall to attach the sisters to, you will have to support them. Can you put a false wall next to the brick wall? Of course , if the wood is solid, then just sister them. Unless you move the plumbing, you may still have to notch them some, but keep as much of the 2 by 10 as you can.
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