Creating a concrete slab or floor from the Course Revit Structure 2013 Essential Training

Creating a concrete slab or floor from the Course Revit Structure 2013 Essential Training

Video: Creating a concrete slab or floor

Creating a concrete slab or floor

In this exercise we’ll use our Drawing Tools to create a concrete slab, or floor, at the first level. So in order to do this, once again we need to be underneath Structure, and then come over here. We are going to need to find our Slab tool. And we can find that over Foundation right here, and we are just going to select a Structural Foundation Slab. Next, once that activates we can come over here, and we can see that we have different thicknesses of slab that we can use.

For this example, I am just going to keep it with the default. I’m just going to use a 6 inch Foundation Slab. Next we need to draw out the perimeter of our slab, or our concrete floor that is going to be inside of this area. So in order to do that we can come over here and we have a choice: we can either use one of our different Drawing Tools—such as just draw lines, or draw a rectangular shape—but the thing I usually like to do is use the Pick Walls tool if that’s available to me. So, I’ll go ahead and select on the Pick Walls Tool. Next, I am going to zoom in just a little bit so I can see where I am picking, and I am going to try to pick on the inside face to the wall.

If you pick toward the outside, it will draw this to the outside of the wall; but in this case we just want it to be on the inside of our foundation wall. So just pick a spot right on the inside face of that wall, and click. You’ll kind of be able to see if it’s there because you’ll see that purpl/pink line right there on the inside face to the wall. Now go ahead and let’s just do this for all four sides of this. So now we have this rectangular shape. Next, all we’ve to do is come up here to the big green checkmark, and select on the big green checkmark.

It’s going to ask us a couple of different questions now. The first one is, would you like the walls that go up to this floor’s level to attach to its bottom? Now, from time to time you might say yes to this, and what it would do is if there is any wall that are going to be directly underneath this floor that we just created, then those walls will be flush with the bottom of the floor. And in this case, I don’t really want to do that. So I am just going to head and say No to this. This next once says, The floor/roof overlaps the highlighted walls—and it’s really talking about these blue lines we’re seeing around the outside here.

Would you like to join the geometry and cut the overlapping volume out of the walls? In this case, it might be a little bit questionable as to whether or not we should or should not do this. But so that you can see it, we are going to go ahead and say Yes to this. Now, right off hand it doesn’t look like very much has happened, but something pretty big actually has. If we take a look at this in the 3D View now by coming up here to our Default 3D View icon, we can now see that, yes indeed, we have this floor and it’s put in place right here at our Level 1.

It’s also sitting on the inside where our Foundation Walls are at. If it’s a little bit hard to see, we can always come down to our Visual Styles and we can turn on Shaded which is going to give us a little bit of color, and we can see where this goes. One other thing to know is that one of those questions we answered Yes to, which was cut the material out of it. But when it says, do you want to cut the material out, what it’s really going to do is this. If we come down here to where this color box is, where we change the Graphic Display Options, turn this to Wireframe now. Now we can see through it, and we can see what it’s really done. It has actually cut the material out of each of these—I’ll call them the Column Locations or Pier locations— and in fact, it’s even cut the material out right here, sort of lowering it down.

So we now have everything actually sitting on top of our concrete floor or concrete slab that we just put into place. You’ll find that slabs and floors are very similar elements, but slabs are entities that are designed to be on grade—which means on the earth, and are often load bearing entities. Thus they have structural properties and can be used by structural analysis software in analyzing buildings and their loads. So that’s kind of the difference between using a Floor tool and using the Slab tool. In this exercise, we used it more as a floating slab, which means it doesn’t really hold up any weight, just to illustrate how it can be drawn.

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