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Old 01-31-2011, 11:11 AM   #1
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Sagging floor


Hey I am new to the site and I have recently purchased a 3100 square foot 2 story house located in central Alberta. I noticed I have a low spot on the main floor and it has created a low spot on the 2nd floor as well. I am hoping to level this problem out and bring the floor back to grade. What is the best method to do this??

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Old 01-31-2011, 11:21 AM   #2
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Welcome Northern Buck to the best DIY'r site on the net

I think that you need to first identify why the structure is deflecting and how much deflection you are dealing with.

Pictures of the supporting structure would help the forum help you.

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Old 01-31-2011, 11:30 AM   #3
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Sagging floor


When the inspector looked at the sag ( i just bought the house ) He felt the sag was from initial settling of the foundation and he figured a telepost would solve the problem it is in the center of the house along the bearing wall and looks to be 1-2" low in the center
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Old 01-31-2011, 11:39 AM   #4
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Sagging floor


The house was built in 1980 fir 12 x 12 floor trusses
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Old 01-31-2011, 12:04 PM   #5
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Originally Posted by Northern Buck View Post
When the inspector looked at the sag ( i just bought the house ) He felt the sag was from initial settling of the foundation and he figured a telepost would solve the problem it is in the center of the house along the bearing wall and looks to be 1-2" low in the center
Ayuh,... So get under it, 'n Jack it Up....
Then add whatever blocking/ posts are necessary to hold it in-place...
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Old 01-31-2011, 01:21 PM   #6
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Hey I am new to the site and I have recently purchased a 3100 square foot 2 story house located in central Alberta. I noticed I have a low spot on the main floor and it has created a low spot on the 2nd floor as well. I am hoping to level this problem out and bring the floor back to grade. What is the best method to do this??
It sounds like the trusses were under sized. The inspectors observation is idiotic as the sag is in the middle of the structure.
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Old 01-31-2011, 02:29 PM   #7
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Assuming you do have floor trusses, you cannot simply add a floor jack to the middle of the trusses. Trusses are designed to be supported on the ends, typically not in the middle at all. Jacking up the middle of a truss and applying a point load there will create a completely different loading pattern than the truss was designed to handle, and should be evaluated by the manufacturer of the truss before you undertake such an adventure. Think of it like jacking up your car, there are specific lift points designed for jacking, using a floor jack under the wrong part of your car may lead to an unfortunate experience, same goes for jacking up a truss.
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Old 01-31-2011, 04:01 PM   #8
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photos of the "trusses" and supporting walls would help.

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