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Floor Bounce

Posted by Harry on January 7th, 2002 07:28 AM

Hi I have a Ranch home built in the 50's with 2X8 floor joist that span 12 feet from the foundation to a steel "I" beam in the center. The subfloor is 1x8's on an angle with 3/4" T&G Oak flooring. There is some cross "X" bracing between the floor joist, but over the years some have been removed for one reason or another.
When HEAVY FOOTED people walk across the floor everything that's not nailed down rattles. Whats even worse is if I am setting in my chair the vibration drives me nuts.
I plan on buying some 1/2" 4X8 OSB and ripping it down to the size of the floor joist. I am then going to center it and sister it to the side of the floor joist. I am then going to cut 2X8 blocking (instead of the X bracing) and attach it between the floor joist.
Am I nuts for doing this? Do any of you think this will help reduce the bounce? Should I put the OSB on both sides of the joist? How much blocking should I put in? How should the OSB and blocking be attached.
If anyone has a simpler less expensive fix I am open.
By the way all of this can be acessed from my basement

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