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Old 01-06-2011, 11:37 AM   #1
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raising main beam


I have a three decker in worcester that has a sagging main beam. it is 6 x8, and in good shape. it is now being supported by 4 posts made from tree trunks and setting on some concrete. i have not found how much of a foundation the concrete is under the posts. I have used a laser level and found that the last two posts are about an inch low. I would like to raise the beam and install new foundation support and lally columns under the beam. I think a 4 inch with solid concrete will be good, but do I need to make up for the diameter being different from the existing wood posts? The wood posts are app. 8 feet apart and are app 8in diameter. the basement floor is a mix of dirt and concrete areas and i plan on using asonatube for the new posts about 2 feet down. any help is appreciated. thank you, matt

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Old 01-06-2011, 03:43 PM   #2
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Ayuh,.... It sounds like a Good Plan, but ya lost me here,....
Quote:
I think a 4 inch with solid concrete will be good, but do I need to make up for the diameter being different from the existing wood posts? The wood posts are app. 8 feet apart and are app 8in diameter. the basement floor is a mix of dirt and concrete areas and i plan on using asonatube for the new posts about 2 feet down.
4" of concrete Where,..?? 'n the sonatube goes Where,..??

I'd be tempted to go with precast 24" round camp/deck pads, 'n put the verticals directly on 'em...

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Old 01-06-2011, 04:03 PM   #3
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raising main beam


I am interested in the same thing. To help Clarify, I believe the original poster is looking at using these:

http://www.lallycorp.com/

I believe this is kinda the end result that the Original Poster wants (As Do I)

(Click for Large Picture)
http://www.renaissancerestorations.c...lallyfinal.jpg

http://www.renaissancerestorations.c.../hpwindsor.htm


For myself, I already have footings on my current columns, but would need a column cap like this for my beam, which is currently 2 2x12's nailed together (1939 style)


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Old 01-06-2011, 04:03 PM   #4
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Pic's?? Give us a visual please. dorf dude...
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Old 01-06-2011, 04:15 PM   #5
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Ayuh,... Jimmy, do ya think you could Resize that picture,..??

640x480 works Perfectly on internet forums....

This GREAT BIG Ship is a thread Killer.....
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Old 01-06-2011, 04:19 PM   #6
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raising main beam


Can't speak for the original poster, but here is what I have. i have 3 of these posts supporting my main beam. This is the worst looking of the three.



This is the base of the above beam on the right, and the middle beam on the left. You can see my footings here:


I am hoping that I can swap them out with a jack or Lally Column and use a cap like shown above to help distribute the weight. is this feasable?

Is it possible to put in two temp jack columns on each side of the column directly on the concrete inorder to swap out the wooden one for the Lally?
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Old 01-06-2011, 04:21 PM   #7
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Originally Posted by Bondo View Post
Ayuh,... Jimmy, do ya think you could Resize that picture,..??

640x480 works Perfectly on internet forums....

This GREAT BIG Ship is a thread Killer.....
I couldn't resize it since it was not my picture. I did make it a link though.

The pictures I added in my above post of my actual house should be within that size constraint.
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Old 01-06-2011, 04:39 PM   #8
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Quote:
I am hoping that I can swap them out with a jack or Lally Column and use a cap like shown above to help distribute the weight. is this feasable?

Is it possible to put in two temp jack columns on each side of the column directly on the concrete inorder to swap out the wooden one for the Lally?
Ayuh,... To Me, Yes, it's easily doable...

A jack, 'n post on either side of whichever post you want to fix, 'n go for it...
Or,... companion jacks/ posts for each post being fixed, 'n then set in down onto the new 1s...

I like a steel plate below the post, as well as above myself....
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Old 01-06-2011, 04:43 PM   #9
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Quote:
Originally Posted by Bondo View Post
Ayuh,... To Me, Yes, it's easily doable...

A jack, 'n post on either side of whichever post you want to fix, 'n go for it...
Or,... companion jacks/ posts for each post being fixed, 'n then set in down onto the new 1s...

I like a steel plate below the post, as well as above myself....

Yes, for me, I would have a steel plate done both top and bottom to help with the load, but but want one like I posted above on the top to help with the load. I need to see if I can get a slightly wider one, cause at the middle column the beam in the middle split some and is hanging down about 1" from the rest. Would like to fix this if possible.
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Old 01-06-2011, 05:43 PM   #10
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sorry for the confusion, a four inch diameter lally column on a poured 2 foot deep foundation. made with a 2 ft sonna tube form. i fear a pre-formed pad would crack under the pressure of a three decker . also can i use the heavy duty lally columns that have a screw adjustment to raise the beam or do i need to use a 12 ton hydralic jack?
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Old 01-06-2011, 06:11 PM   #11
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I would do some measurements an run some numbers through the old calculator or call in an engineer before I guessed at what size footers I needed.

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