http://www.homebuildingandrepairs.com... Click on this link for more videos on how to repair parts of your home as well as new construction tips. This video is part three in our series on how to raise floor joist in a crawlspace using a large beam with a couple of jack's and blocks. Make sure you watch the other videos and remember this job could be hazardous to your health. Jacks can fall, lumber can break and if you're underneath any of this when it comes falling down, you could get injured. I'm not trying to scare you, but you need to take every safety precaution you could imagine and all of the ones I mentioned in these videos seriously.