House Built: 1915
Room Span for supports: About 14-15 ft (wall to wall)
So I just had my flat (slightly pitched) first floor roof replaced which so happens to be over my kitchen (both were extensions onto the original house) Nothing above the roof.
So with that I decided to replace my kitchen ceiling as well. I had the usual drop ceiling grid with the lath/plaster. So I got rid of all that and am now down to the wood supports.
The joist structure is a two tier structure with one tier (top tier) of 2x8 supporting the roof which sit on the shoulder plates of the kitchen structure and the other tier (lower tier) is made of 2x6 joists which support the ceiling. They sit on (or rather are etched into) 1x2's which are nailed into the shoulder plates
Now I have two problems:
1). The tip tier joists sit about 24" apart on center. Not sure if this is a typical setup. The middle joist cracked straight in half (probably from the winter snow weight). In order to get the roof replaced the roofer simply resupported the cracked joist with 2x8 pieces so they could apply the plywood board, but now I need to either sister this middle joist or add 2 new 2x8 joists (one on either side of it) to properly support the middle load.
Any ideas on the best course of action for this is appreciated?
2). My lower tier joist support system for the ceiling is sitting on 1x2's. Quite flimsy for my taste and they wobble like crazy. Yes they have been like this since the kitchen was built some 50 years ago and yes my new ceiling will be lighter then the old one, but now that I have it open I want to resupport them and get rid of the side to side wobble and slight vertical wobble.
Any idea how I should go about doing this?
Thanks all for any ideas you may have for me.
P.S. In case anyone is wondering about new ceiling weight I plan on putting some 6" recessed lighting around the room perimeter and a ceiling fan in the middle.