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Now that we've looked at walls a little bit and figured out how to draw them, the other thing that comes up, in mind, is that all walls have tops and they all have bottoms. It depends on how you want to work with the wall. Whether it's supposed to be placed on the first floor or if it's supposed to go below the first floor? It, does it meet the ceiling line, or does it go up to maybe the second floor where you have the concrete floor? So, in other words, we need to maybe learn how to constrain walls as you work with them.
So let's take a look at how to do that. I'm going to basically come in to this third box over here, and kind of set it up this way. And we're going to draw four walls. I'm going to come over and pick architectural and I'm going to keep basically the generic six inch wall. And I'm going to draw it down. And I'm going to make it 15 feet. And then I'm going to come up here and hit modify in order to escape, because I don't want to draw any additional walls at this point, but what I want to do is copy this wall.
So I'm going to click on it. I get a modify walls ribbon. And in the modify panel, there's copy. I'm going to pick copy, and I'm going to make sure that multiple is selected so I can make a number of copies of this wall. Just come over here and pick a corner, or maybe the midpoint, and I'm just going to pull out and put in four walls. Now with that done I'll come back here to modify and I have four walls.
Now let's take a look at what they look like in properties. So I'm going to click on this first one and when you're looking at wall heights you want to check out two things. One is, the base. The other is a constraint factor, and also an offset factor. And then you also have top, which has got a constraint factor, and an offset. Now what that means, basically with the base constraint. It means that it's anchored to the first floor. You can change that by coming in and looking at the list as far as what other levels you have.
From there, you can also offset it from the first floor. Either in a positive or negative mode. Top constraint basically means that you can take it and assign it to a level that needs to be made. You can do unconnected. Or, you can come up to, the second floor, which this currently is at. And then from there, you can assign either a positive or negative number to make it either go above or below that particular base line. So what we're going to do is we're going to set these four walls with constraints.
And then, what we're going to do, is we're going to look at 'em in elevation mode. So you have an idea, as far as what they look like. So, the first one, here, I'm going to pick this one. And we're going to make sure that the first floor is a base constraint. Our base offset's going to stay at zero of eight zero inches. Our top constraint is going to be set to second floor. So make sure that's on second floor. And that our top offset, which is currently at minus two. We're going to come in here and change this to zero and then hit apply.
And then go to the second one. The second one we're going to set this up with first floor. And we're going to set this base off set. In other words it's going to be below the floor at a minus two. We're going to keep the top level at level one, and we're going to change the top offset to zero. And then hit apply with that, too. Third wall, click on that one. We're going to set the first floor. We're going to keep the base offset there. And our top offset is going to change to a positive number.
So what we're going to do is take out the negative. You can just use the delete key for that. And then click on that. Let's take a look at wall number four. Click on that one. And on this one here, we're going to set the base offset to two feet, so we're going to come in and change this to two. And our constraint level is still going to be second floor and we're going to keep this at a minus two as well and hit apply. So now we have a number of different things going on. Go down to the project browser.
And under elevations, go to south. When you click on it, you'll notice here that you got a number of different things going on. Notice that on the first wall, we're set here for first floor. As is this one. But this one's got an offset of a negative two feet, so it is actually below the wall. This one's taller because at the ceiling line of level two it's actually going above, and this wall here has got two offsets. So you can see that there is a difference in how you can set these wall heights.
Let's go back to the first floor. What we're going to do is kind of zoom out. And we're going to go to this wall location line here. This is another example. And we're going to go to walls, architectural, and generic. This time, we're going to play with location lines, because with these, you can set the way that you want to draw the wall. Depending on what you pick. Let's take a look at what we have. We've, we have wall center line picked, and if I pick this object here, notice how it's drawing right on the wall line there in the center, okay? I'm going to hit the escape key.
I'm still basically in the walls command, so I'm going to pick finish face interior. And I'm going to draw, again along this line as a guide, and you'll notice that it draws it on the top. So I'll click that and hit escape again. The next time I'm going to come over here and I'm going to draw going not from left from right but I'm going to go from right to left. And notice that it puts it on the bottom. So depending on which way you actually draw the wall will depend on how you want it to be oriented.
And as you can see here, we've got a couple different types. Same thing happens with some of the other ones that are up here too. As far as with the exteriors and then there's also core face, which, we'll eventually maybe take a look at. So, when you're working with walls, it's important that you understand something about wall heights and being able to set up the constraints as far as where you want the walls. If you know in advance, what you're doing it's much easier to come in here and set it up for the first time, than having to go back and edit it again.
The other thing is that when you draw the walls, just to understand how to use the location line to your advantage. A lot of times, architects of course, use wall center lines. Interior designers like using the face interiors. And there's a difference as far as how things are measured and the way that you go ahead and draw them.
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