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In Revit Architecture 2011 Essential Training, author Paul F. Aubin shows how to create compelling architectural designs using the modeling tools in Revit. This course covers the entire building information modeling (BIM) workflow, from design concept to publishing. It also covers navigating the Revit interface, modeling basic building features such as walls, doors and windows, working with sketch-based components such as roofs and stairs, annotating designs with dimensions and callouts, and adding 3D geometry. Exercise files are included with the course.
As you sketch elements like roofs and floors, the geometry you create will often maintain associative relationships to the surrounding geometry. For example, if you use the Pick Walls option to create your sketch lines, the shape of your roof or floor will change automatically if the walls move. This is only one example. There are other modifications that we can employ to create intelligent relationships among the various parts from our model. In this movie we'll highlight some of those topics, and we'll also explore a few other miscellaneous roof-making techniques. Some of these we've already seen, so it's more like a summary. We have a gable roof here. We have a hip roof.
These are both done with footprint roofs. So is this shed roof over here is also a footprint roof. Let's do something with the shed roof here at the end though, to make it match what's going on here and here with these two roofs here. Notice that the walls are actually following the shape of that gable roof, but here in the shed, they clearly are not. This is exactly a pretty easy change to make. I'm going to highlight one of the walls, press my Tab key to Chain select all four walls. Now remember, it's been a while since we've done Chain select, if you've been following the movies in order.
So don't move your mouse away, because if you do, you haven't selected anything. You've got to pre-highlight one wall, Tab, then click to get all four walls. Now they're actually selected. Then over here on the Ribbon, you can choose Attach Top/Base. When we click that tool, it will prompt us to select something in the model. And I'll just go ahead and select the roof, and you'll see the walls jump up and attach themselves to the roof. Now what's important about that is we talked about these relationships being associative and maintained.
So this roof was drawn with the Pick Walls option, like the roofs we did in the previous couple of movies. If I were to move this wall, you'll notice that the shape of that roof moves along with it. Furthermore, if I were to take this roof and actually scroll down here and adjust its slope, so instead of a 3'/12'' maybe I make it a 5'/12'' and go ahead and click Apply, you'll notice that that new attachment we just made of the walls stays maintained as well.
So there's sort of this circular relationship between the walls driving the shape of the roof and the roof driving the height of the walls. So those two work together. Now let's direct our attention over here to these two flat roofs. A flat roof is also generated by a footprint roof. So we draw the footprint roof and to make it a flat roof, we simply make none of the sketch lines slope-defining. So I'm going to select this roof, choose Edit Footprint. You can see the four sketch lines.
And if you were to click on any of them, none of them have Defines Slope. You tell that just by looking, because none of them have that little triangle symbol. So in order to create a flat roof, that's all you have to do is you sketch your footprint, and you just make none of the edges slope-defining. But I've taken this roof and taken it a step further. Notice when I pre-highlight it, it's got those four red, little, squared handles at the corners. These are little shape handles that are associated with flat roofs. You won't get those if you pre- highlight a roof that has slope-defining edges.
So if you look at the roofs that actually have slope-defining edges, when you pre-highlight them, they don't show any of those little squares at the corners, and furthermore, if you select them, the only tool that you'll see here is Edit Footprint. Contrast that to this one: If you select it in addition to Edit Footprint, you see this panel here where you have all the shape editing tools. So what shape editing tools allow you to do is do things like add points, for example. I'm going to add a point in this roof and change the elevation to - I am going to do something very dramatic, to maybe 4 feet and click it right there.
When I click the Modify tool, you'll see that that basically turned this roof into a pyramid. So when I started this file, I did something much more subtle. And when I click on that roof, you've got this tool is how you can get in there and actually modify these points after the fact. So the Modify Sub Elements. If I click on one of those little squares, as you can see that one set at 4'' and this one set at 0''. So there's a very subtle, little drainage slope going on in this roof. Now, if you want you 4 feet and the pyramid shape, you can certainly do that.
So by actually adding these points, you can sculpt a pretty dramatic roof. Now what I'm going to do is actually undo the placement of that point, and I'm going to go to a section view, because I want to show you one more thing about this modification that I made. So remember, at this side of the roof - let me just show you Modify Sub Elements again - the point is that 4'', and at this side of the roof it's only at 0''. But furthermore, what we've done here - let me zoom in even closer - is you'll notice that the insulation component that's used on the roof here is actually thicker on this side than it is over here on this side.
So I'm going to select this roof. You'll notice that instead of using the Generic-12'' roof that we've been using in other movies this one is actually a more complicated roof that has Metal Deck and EPDM. And I'm going to edit its type. Now, when I edit its type, I can then edit the structure. And if you recall the movies on creating walls, we looked at a similar dialog to this when we were looking at the wall structure. Like walls, the roof has a core with a structural component, in this case Metal Deck, and then it has some Insulation, and then a Finish material, the EPDM.
The Insulation component has a check box right here which makes it Variable. I want to summarize all that parts and pieces here, because there is a lot of moving parts to make this work. To do this technique that I'm showing here, you need three things. You need to create a footprint roof with no Slope Defining edges. Next, you need to go into the shape editing tools and add points at different Z heights. In my case, I did 0 and 4 inches. It doesn't matter how much; you've just got to have different heights. Then finally, you need to edit the structure of the roof assembly and make one of the components variable.
Typically, that's going to be your rigid Insulation, because you'd want to keep your structure flat like I have here, and have the installation taper to allow for drainage. So, if that's the kind of roof structure that you need, those of the tools that you have that you can use to accommodate that.
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