brokenthumb
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- Joined
- Feb 5, 2015
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One of the many to do list things here is to beef up my floor joists. My house was built in 74. It's 24 x 48. There were a lot of sins committed when they built her, just one surprise after another. The floor joists are 14 foot 2x8s at 15 inch centers. I have always a bounce, but the other day, my 4 year old was jumping in the middle of the living room floor, and I thought the TV was going to fall over. I thought about sistering the joists with another 2x8. I would have to lay it flat, slide it into position, up over the center beam, then out over the outside wall. I worry about twisting the board into an upright position beside it's sister in case I cause damage to it, or the upstairs drywall. I read an article in the Hammer (gotta get my keyboard fixed) Last letter of the alphabet followed by one. It said when sistering floor joists, it is not always important for the joist to sit on support ends, as the strength is only needed in the center. For example a 14 foot 2x8 spanning 12 feet would only need a 10 foot sister, providing the existing joist is not sagged in the middle.....Thoughts....