Replace rotted lally column?

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  #1  
Old 08-24-06, 07:13 PM
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Replace rotted lally column?

I have a 4x4 lally column that is of questionable character... in other words, I don't trust it. The bottom of it is mushy, and I can tear pieces of it out with my fingers. This column goes down through the cement floor, and is standing on the footing. I know this because half the post is gone, and I can see the footing.

Here's what I want to do.

1. Rent a couple of house jacks and steel plates and place these on either side of the rotted column (the beam is split directly above the existing column). Raise the beam maybe 1/8".

2. Tear out the rotted post, all the way to the footing. I'll probably have to hammer out some of the basement floor to expose the footing.

3. Insert a new adjustable steel lally column, anchor it to the footing and fasten it to the main beams (it's split).

4. Fill the hole with cement.

5. Release the house jacks.
 
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  #2  
Old 08-24-06, 09:22 PM
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This wood be the method I wood use.

Set the jacks on 4x12, 4' long, to spread the load.
Remove the post.
Install a Simpson ABU:
http://www.strongtie.com/products/connectors/AB-ABA-ABE-ABU.html

A new DF post under a Simpson CCQ:
http://www.strongtie.com/products/connectors/CCQ-ECCQ.html

The ABU has a stand-off plate that raises it above the floor level.
 
  #3  
Old 08-25-06, 08:31 AM
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Don't use those simpson standoffs, The steel lally Column must sit dirrectly on the footing, your holding up a main beam not a deck, Raise the beam as little as possible to remove the lally. Cut the lally the same size as the old and reinstall it comes with plates that hold it in place, you don't need an ajustable one unless you got some sagging issues.
Frank
 
  #4  
Old 08-26-06, 12:50 AM
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Originally Posted by Frank99
Don't use those simpson standoffs, The steel lally Column must sit dirrectly on the footing, your holding up a main beam not a deck, Raise the beam as little as possible to remove the lally. Cut the lally the same size as the old and reinstall it comes with plates that hold it in place, you don't need an ajustable one unless you got some sagging issues.
Frank
I believe the term "standoff" has caused you to confuse a "J/JP", http://www.strongtie.com/products/connectors/J-JP.html#gallery, which is sometimes used with "deck" framing,
and "ABU", http://www.strongtie.com/products/connectors/AB-ABA-ABE-ABU.html, which is a structural connector.
The "stand-off" breaks the wood to concrete contact.
 
  #5  
Old 08-26-06, 01:10 PM
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Thanks for this information guys. I'm still going with the adjustable column, as I can just install it, lock it, and be done with it.
 
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