Fill and Layer Sand with Geogrid

fail a lot like a balloon rupturing. They'll give you the early signs that there's a problem. And as soon as you start to get that inkling that something could be going wrong, it's already wrong, you guys. So, the reason I'm using sand is because it's one of the most difficult materials to actually work with. Although it's a good material, it has no cohesive nature. So when you're actually back filling with sand, it's actually fairly susceptible to movement because it's not binding itself. So, in this case, we're going to be relying 100% on the geog grid to do all of the support of these uh columns that we're building. Now, I'm adding water to the sand just to help it stick a little bit more. [Music] I'm basically going to build these up till I run out of sand. I can put in another layer of grit. [Music] So, I'm putting the same amount of lips in, same height on both of them. Let's put our last piece of grit in and we'll finish off these. Now, there's a number of different ways we can actually test this grid. One of the ways is by shaking the table, and you'll see which one holds up better. The other way is by doing something a little bit more actually applicable, which is the static load test. Because when you build a retaining wall, you've