Sistering Joists Effectively
Sistering Joists Effectively
(OP)
I am renovating a couple balconies because the existing 2x10 joist from ext to int are decaying. I plan to sister a joist in and am having a difficult time determining how to connect the joist effectively. I can't connect the joist directly to the decaying joist because I cant assume the "bad" joist will transfer the load. However, I also have an issue nailing directly to the diaphragm because I have an 1 1/2" of concrete above the 1/2" plywood. Any ideas on how I can connect the new 2x10 joist and get any values???





RE: Sistering Joists Effectively
But, more importantly, correct the reason for the deterioration of the joists in the first place. With a 1.5" concerete overlay on top with plywood underneath, I would expect venting problems or the total lack of it (Have seen a lot of this in Apt buildings). I would also expect the plywood over the joists to be aqs deteriorated, if not more. Check it out if you haven't done so already.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Sistering Joists Effectively
If so, the repair can be complex or easy.
1. Complex - you will need to te tear out the ceiling and re-install.
2. Simple - cut them off, install a ledger and posts
Good luck. Done a bunch of them either way!!