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Establish Elevations and Excavate Trenches

3:33
15:14
90.5K views

At 3:33 in

Creating a yard off a SKETCHY slope

What happens here

After the initial boulder wall is complete, use a laser level and string line to establish the precise elevations and alignment for the main retaining wall. This involves setting up the laser receiver on a grade rod and using it to mark the desired height along the wall's path. Next, carefully excavate a wide, flat trench that will serve as the primary footing for the geo-grid. Additionally, dig a narrower, deeper trench for the front face of the retaining wall blocks. Ensure all organic material is removed from these trenches to prevent future settlement.

Goal: Create precise footings for the geo-grid and retaining wall blocks

Tools and materials

  • Excavator Bucket — Digging trenches and moving soil
  • Grade Rod with Receiver — Measuring height relative to the laser level
  • Impact Driver Milwaukee — Removing bolts to change excavator buckets
  • Laser Level — Establishing precise elevations for the retaining wall
  • Mini Excavator — Digging the wide and narrow trenches
  • String Line — Marking the exact line and height of the wall

What they say

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all right guys so got a little Boulder wall done yesterday so dude can get his AC put up on there uh so we're going to start digging base for little wall today so we're just shooting our elevations getting the string line all set up and just started rocking in a rolling [Music] sections of this wall will be over 9 ft tall so that means it will be fortified with four to five layers of geogrid each layer of geogrid extending horizontally behind the face of the wall between 9 and 11 ft but that also means all organic material that is behind the face of the wall has to be stripped and removed [Music] holy crap look at all these freaking ants what the hell that's a pile of them right there it's a pile of them right there too they want to see the footing yeah put a little bit of a kink in the plant usually they're cool we can keep building usually they're usually they're just cool with the picture but he sounded younger so maybe more oh he's a younger one that's it right there old guys are like yeah well it was like I was saying dude my my dad always had problems with the inspectors up in this neck of the woods going to keep working on digging over there Joey and I are going to get these hostas dug out it's the uh home owners moving the air conditioner over to where we put that wall and they were saying they want to add patio here so the AC guys are you know they're going to have to trench and all that stuff to get it moved and hopefully we got to talk to them but hopefully they can run their run their lines right on the right under the edging therewi it's going to be getting in the way of the base for a patio and stuff like that [Music] removing the hassas his perfect job to keep the guys out of the work Zone Lane has to cut that lower Bank down enough so that we can get the first row of geog Grid in this is not just for the bottom row of block this is also for the lowest layer of geogrid that gets installed [Music] oh it looks like we sprung a leak boy oh yeah that's a good leak where is that coming from oh that line right there yeah it's this one right there it looks like need um [Music] the large flat zone is the footing for the geog GD the smaller trench is the footing for the face of the retaining wall now I want you to watch just how slowly and carefully he digs the bottom for the retaining wall because if he goes too deep the soil has to be put back in place and compacted so it's fairly critical that we get this step right so we don't get any future…

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