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Old 07-17-2012, 09:14 PM   #1
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Rotted sill plate and broken joist repair


I have a three story plus an attic 3 family house that has a rotted sill plate, with 6 broken (snapped) joists. I want to lift the house and replace the sill plate and joists. I am concerned about what type of jack to use since there is so much weight being a 3 family house.

My questions are as follows:
1) What type of jack is suitable for a 1200 sq ft per floor home 3 floors?
2) How can I jack the house up when the joists are broken and I cant access the sill? (sister in new joists next to the cracked ones?)
3) Can I put 4x4 beams on the joists and then jack the beams up as long as they are evenly distributed?
4) Once I jack up the side with the rotted sill do I just cut out the bad area and then cut a new piece and fit it into the cut out area?
5) The sill sits on cobble stone so what would be the best way to secure the new sill into the area? (glue, masonry screws, bolts ect..?)
6) I dont mind if the house walls crack (house is vacant) so is it ok to jack it up all in one day to remove the sill or will this crack and break water pipes, wood framing, exhaust ect...) basically do I need to jack only 1/4" each week or can I jack it up all in one day?

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Old 07-17-2012, 09:21 PM   #2
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Rotted sill plate and broken joist repair


Somethings very wrong to have had all that damage.
Not a DIY job. Time to call in the pros.

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Old 07-17-2012, 09:25 PM   #3
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Rotted sill plate and broken joist repair


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Originally Posted by joecaption View Post
Somethings very wrong to have had all that damage.
Not a DIY job. Time to call in the pros.
I disagree my friend. The sill is rotten and weak so the joists cracked in that area. I hace worked in construction for over 8 years but I have never jacked a house up. I am comfortable doing it but I just want to be sure I do it right.
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Old 07-17-2012, 09:48 PM   #4
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Rotted sill plate and broken joist repair


I can't he;p you---and I doubt if you will get good answers from the folks here that know how this job should be done---

You need to know where to place your temporary girders-- and rent some house jacks and cribbing--

To much risk with a commercial building that is occupied by tenants---

the lifting job may not cost as much as you think---Mike----
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Old 07-17-2012, 10:13 PM   #5
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Rotted sill plate and broken joist repair


The house is vacant.
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Old 07-17-2012, 10:13 PM   #6
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Rotted sill plate and broken joist repair


Post some pictures inside and out.

There's nothing left by the sounds of it to even lift.
A pro company is going to have to most likly remove the siding, cut out the floors, remove the sheetrock and attach 2 X 8 to the studs on both sides with lag bolts, build doubled up lifting beams to be able to set there hydrolic jacks.

Done wrong the walls bow out, a whole lot of inside damage gets done, and it's very possible the whole thing can come down.
Is your insurance going to cover the damage to the other peoples property and pay for a place for them to live?
I've pretty much done nothing for the past 15 years but work on 100 plus year old houses. Even I know my limits.
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Old 07-17-2012, 10:27 PM   #7
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Rotted sill plate and broken joist repair


Post some pictures---might be do able---that's a lot of weight---need to see the basement and outside of the structure----


I've lifted some big structures--but not that big---

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