Originally Posted by skellies
I'm doing some leveling of my floors and a contractor suggested sistering several joists to give more support in my kitchen and dining room. Also some of the joists have cracks.
I own a 1920 two-story, nothing fancy. I have to sister 10 2x8x16 joists in my basement. What is the best way to do this. Should I use some type of u-bracket made for sistering joists and nail that through the joists or will just nailing the new and old joists together be sufficient?
I'm in NY state. Thanks.
What Big Dave said is good. That will defintely give you more support.
For cracked joists, especially in the areas where you might be adding more weight onto the floors:
Try 'sandwiching it' between 2 'sistered' joists with the nails and construction adhesive to hold it. Then you could drive lag screws or even carriage bolts all the way thru. This pulls it all nice and tightly together. You can alternate these (lags or bolts) near the top and then near the bottom of the sistered joist like you would on a deck ledger board.
We do that alot for sagging main carrying beams after we get them straightened, in order to keep them straight.