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Old 04-22-2013, 08:18 AM   #1
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Help retaining Wall 6x6 Timbers, out of plumb


Hello,

I started a timber wall the other day...I dug my trench, leveled the dirt as best as i could...tamped the ground....I then laid down stone, tamped that...leveled it.

I put my first timber in 6x6x8 checked my level(length) then plumb(front to back...is that what plumb is?). The wall will only be about 3ft high...

I started to hammer in my 4ft re-bar through the pre-drilled holes and as i continued i noticed that my level(length) stayed but not the plumb now i have this first timber in the ground and it's out of plumb....is there anything i can do to straighten it out?

if i pull the timber out and start over...how can i prevent this from happening again? Any suggestions on how to pull the timber out?

My wife is predicting i'm going to fail, so any help would be more than appreciated.

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Old 04-22-2013, 08:37 AM   #2
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Help retaining Wall 6x6 Timbers, out of plumb


The grading needed to be dead level in both directions before the first one when in or it's going to be further and further out the higher you go.
Also I bet your missing drainage and a dead man to keep it from tipping.
http://www.bing.com/images/search?q=...electedIndex=3

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Old 04-22-2013, 08:52 AM   #3
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Help retaining Wall 6x6 Timbers, out of plumb


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Originally Posted by joecaption View Post
The grading needed to be dead level in both directions before the first one when in or it's going to be further and further out the higher you go.
Also I bet your missing drainage and a dead man to keep it from tipping.
http://www.bing.com/images/search?q=...electedIndex=3

I only have one timber down and i did check level in both direction after i tamped the stones...I also do have a 4" perforated pipe that i will be be installing behind the first course and will also be installing a dead man on the 3rd row.

is it possible that hammering in the re-bar shifted my base?
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Old 04-22-2013, 12:27 PM   #4
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Help retaining Wall 6x6 Timbers, out of plumb


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Originally Posted by carneyxii View Post
I only have one timber down and i did check level in both direction after i tamped the stones...I also do have a 4" perforated pipe that i will be be installing behind the first course and will also be installing a dead man on the 3rd row.

is it possible that hammering in the re-bar shifted my base?
Yes. What are you using for your base?
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Old 04-22-2013, 02:46 PM   #5
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Help retaining Wall 6x6 Timbers, out of plumb


Plumb is level but in the vertical direction. so you would check for plumb at the vertical face of your 6x6. Pictures will help tremendously. We'll get you thru this but more information is needed.
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Old 04-22-2013, 03:26 PM   #6
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Help retaining Wall 6x6 Timbers, out of plumb


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Yes. What are you using for your base?
My base is an all purpose stone...rocks are all different shapes and sizes.
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Old 04-22-2013, 03:27 PM   #7
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Help retaining Wall 6x6 Timbers, out of plumb


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My base is an all purpose stone...rocks are all different shapes and sizes.
Can you be more specific when you say "all shapes and sizes"? Are you talking stuff larger than ~1"?
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Old 04-22-2013, 03:29 PM   #8
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Help retaining Wall 6x6 Timbers, out of plumb


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Originally Posted by brockmiera View Post
Plumb is level but in the vertical direction. so you would check for plumb at the vertical face of your 6x6. Pictures will help tremendously. We'll get you thru this but more information is needed.
thank you, i'll send you some pictures when I get home
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Old 04-22-2013, 03:37 PM   #9
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Help retaining Wall 6x6 Timbers, out of plumb


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Can you be more specific when you say "all shapes and sizes"? Are you talking stuff larger than ~1"?
the stones are not larger than 1" there are a few that are about an inch in size, but most are smaller.
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Old 04-22-2013, 03:59 PM   #10
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Help retaining Wall 6x6 Timbers, out of plumb


I would have used stone dust or crush and run.
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Old 04-22-2013, 04:01 PM   #11
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Help retaining Wall 6x6 Timbers, out of plumb


i'm starting to feel that my base is the issue
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Old 04-22-2013, 04:15 PM   #12
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Help retaining Wall 6x6 Timbers, out of plumb


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i'm starting to feel that my base is the issue
Yeah I think I agree. Using that big of a stone is hard to compact and get a level surface to build on. Did you use a hand tamp or a compacting plate / vibrating type gas powered tamp?
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Old 04-22-2013, 06:03 PM   #13
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Help retaining Wall 6x6 Timbers, out of plumb


Best material for base is a medium to coarse sand, or crushed stone 1/4 inch in diameter or smaller. I have used stone dust also, it works, but I prefer sand. Makes it easy to tamp the base level in both directions. It is easy to get the first unit of a wall out of plumb or out of level, and as you have discovered, the rest of the wall only gets worse.
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Old 04-23-2013, 06:54 AM   #14
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Help retaining Wall 6x6 Timbers, out of plumb


Here are a few pictures I mainly wanted to show the base stone. The re-bar is 1/2" so you can see that my stones do exceed 1".

I already pulled the first timber out.
Can I use this stone to back fill? So it won't go to waste?
Attached Thumbnails
Help retaining Wall 6x6 Timbers, out of plumb-image-497236316.jpg   Help retaining Wall 6x6 Timbers, out of plumb-image-294238188.jpg   Help retaining Wall 6x6 Timbers, out of plumb-image-1111074447.jpg  
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Old 04-23-2013, 07:25 AM   #15
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Help retaining Wall 6x6 Timbers, out of plumb


That gravel looks very coarse for a base material. I think you will struggle to get it packed well enough to form a solid base that won't shift once you start driving rebar. It would probably be okay to use for the drainage rock behind the wall, but for the base you really want something that is going to compact tightly. I'd recommend using something like crusher run for the base; it will be much easier to get a tight, level, starting point. Home Depot sells 1 ton bags of it (under $50) if you've got a truck to pick it up with, or bulk stone/landscape material places should have it as well. It stinks to go backwards, but at least you have only done 10' or so at this point, and can likely reuse what you've got in there behind the wall.

How high is this wall going to be? Just tall enough to hold back that little slope where you have removed sod (~2-3 courses above grade)?

Also, I don't see how the current position of your toe drain will allow you to run it to daylight. It is below the grade of the sidewalk all around. You'd likely need to install it on TOP of the material that is backfilled behind the bottom course.

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