foundation supports

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northernmainecoal
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Post by northernmainecoal » Fri. Nov. 03, 2017 3:42 pm

Hello all

I have an older potato house in need of some help. The two 12" thick concrete walls that run the length of the building have been gradually pushed in over the years and are now at the point where I really need to do something about it.

I plan to put 2 vertical 6x6 beams directly opposite each other that run from floor to ceiling against the outer walls. Between those two vertical beams I am going to run horizontal 6x6's to use to push the walls out. I am thinking that I can mount a jack about center of the horizontal beams to gradually increase the outward pressure over time. The horizontal beams will be braced so they can't move up or down with the pressure, just out.

My question is what type/style of jack would be best suited for the job?

Thanks

 
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Post by Logs » Fri. Nov. 03, 2017 4:06 pm

I used to work for a mechanical contractor and when working in a ditch , we would use these ditch jacks to support the walls of a ditch. This was before they started using a ditch box. I think they would work for your application. It was used with heavy 2” pipe. The 2 pieces would slide in the ends of the pipe and we would use oak planks against the sides of the ditch.

https://www.google.com/search?q=ditch+jack+used+f ... 8gtImW0D0M:

 
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Post by Pauliewog » Fri. Nov. 03, 2017 6:26 pm

Unless you can find a contractor that has trench jacks you can borrow, your next best option and what I would use are screw jacks.

Most home centers carry the house post jacks.

These are reasonably priced and will also do the trick.
https://m.lowes.com/pd/Akron-12-in-Adjustable-Jac ... VSEALw_wcB

Paulie


 
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northernmainecoal
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Post by northernmainecoal » Sat. Nov. 04, 2017 5:18 pm

Pauliewog wrote:
Fri. Nov. 03, 2017 6:26 pm
Unless you can find a contractor that has trench jacks you can borrow, your next best option and what I would use are screw jacks.

Most home centers carry the house post jacks.

These are reasonably priced and will also do the trick.
https://m.lowes.com/pd/Akron-12-in-Adjustable-Jac ... VSEALw_wcB

Paulie
Those look perfect, especially the price, thank you. The screw jacks I had been looking at previously were quite pricey. I hope to get the beams and jack in next weekend:)

 
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Post by Pauliewog » Sat. Nov. 04, 2017 10:21 pm

Rob,

Don't forget to post some pictures and let us know how you make out :yes:

Paulie

 
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Post by CapeCoaler » Mon. Nov. 06, 2017 9:30 am

How long is the wall...?


 
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Post by northernmainecoal » Mon. Nov. 06, 2017 11:06 am

CapeCoaler wrote:
Mon. Nov. 06, 2017 9:30 am
How long is the wall...?
The building is roughly 36'x50'

 
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Post by CapeCoaler » Mon. Nov. 06, 2017 7:14 pm

Probably going to need a jack and bracing every 5'...
and excavate behind the wall to bring it plumb...
You will never just push it back...

 
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Post by northernmainecoal » Fri. Nov. 10, 2017 3:20 pm

I realize I'll never get it plumb without excavating but I'm hoping over time it will push back out some. At least it can't get worse now (I hope) it was in worse shape than I thought. I used one of those floor Jack's from Lowe's and will increase pressure over time

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Post by CapeCoaler » Sat. Nov. 11, 2017 11:19 pm

Looks to be bowing in the middle...
Rather than just leaning over...
Water freeze thaw cycle will bring in more soils...
To the voids created by ice...
maybe some clay in there also...
Gutters on the wall where it is failing...
Water off a roof will also undermine a foundation...
The fines will come out of the soil leaving gravel and deep water penetration...

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