Go Back  DoItYourself.com Community Forums > Interior Improvement Center > Paneling and Trim
Reload this Page >

straightening floor joists by jacking house

straightening floor joists by jacking house

Reply

  #1  
Old 11-02-01, 05:39 AM
wible1
Visiting Guest
Posts: n/a
I am currently in the process of slowly jacking the floor in my house with a beam/jack post combination in the basement.
The dining room floor in my 1922 home (recently moved into) had sagged in one quarter of the house approximately 2"-3" from the walls. The problem appears to be the result of the house construction - the load bearing walls on half of the house are offset from the main structural beam (which is visible in the unfinished basement) by about 4'. Apparently, the builder recognized the problem and doubled up the 2x10 floor joists on this quarter of the house; however, the floors have still sagged considerably. The joists span about 18' from the 6x8 beam to the outside wall (there is no sag on the opposite side because the span is only 12'). After much research on how to jack the floor, I have placed a beam across the sagging joists (midway under the 18' span) and have started the slow process (quarter turn of jack posts a week). The first turn of the jacks resulted in lots of snapping and cracking from the old house. My concern now is that the floor joists may not straighten as intended, but may actually crack from the extreme new stress, especially underneath the load bearing wall (there is now an 8' span from the center beam to my new beam, with the load bearing wall about midway). The joists are very old, hard and possibly brittle (you can hardly drive a nail in them). Any advice based on experience with jacking old, hard, dry wood? Will it straighten or is cracking a concern?
 
Sponsored Links
  #2  
Old 11-17-01, 09:26 PM
some help
Visiting Guest
Posts: n/a
Hello
You need to have a beam under the load bearing wall and jack at that point to do it right leave the one you have in and add one under the wall and start going up you will find it will be much easyer to hold every thing in place.....Good Luck
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes