How to Fix a Broken Floor Joist
A note on Jacking: Jacking too fast can cause wall cracks above and many times it’s better to jack slowly, 1/8 a day, to get a joist level.
I then used a 5-pound hammer to carefully move the new joist into position. I needed to hammer the joist only where it sat on the beam, since this is where the joist was catching.
Alternative Joist Install TIP: if the new joist is hitting a beam and the floor above and jacking is not an option, you can cut small bevels on two opposing ends where the touch the beam and floor board. This helps the joist turn into the proper resting position.
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