Join Paul F. Aubin for an in-depth discussion in this video Model lines, part of Revit 2018: Essential Training for Architecture (Imperial).
- [Voiceover] This video I wanna talk about model lines. Now model lines are just two dimensional line geometry but because they're model lines they're actually considered part of your model. Therefore, if you draw them, whatever view you draw them in, they're still going to show in the other views. So if I draw a model line in elevation, it will still show in 3D. If I draw it in plan, it will still show in reflected ceiling plan and so on. So a model line is a great option to draw smaller details that you otherwise wouldn't want to model in full blown 3D. The example that I'm going to share with you here is control joints and a brick wall.
You probably want to see the control joints. You probably want to see them in your elevations and maybe even in the 3D views. But the only other alternative way that you can do control joints is to actually model them. So for example, you might be tempted to use a reveal for something like a control joint. So what I'm showing you here is a facade that has two reveals. Now this one is the full width of a brick and that one makes a little more sense to use a reveal for because it's an architectural detail. And you'd wanna actually see that it carves into the brick maybe and you'd wanna maybe even have a little shadow line there and shaded views.
Compare that to this one on the other hand which is much smaller to represent a brick joint. As a reveal it's just a little bit too overpowering. If you look you'll notice that the line that's representing it is very very bold. Okay and the reason for that is if you zoom in closely on this, it's actually carving a small little square shape out of the brick. So there's actually two edges there instead of one. Having those two edges can make this really appear rather overpowering.
Furthermore, its literally cutting away from the brick which means that if you add dozens or hundreds of these along the course of a very large model it can start to affect performance. So if your goal is to just represent something like a control joint and you want it to show in multiple views, elevations and 3D views, then I think a model line is a better approach. Now I've got another view here called model lines and it's just the other side of the building and so on this side of the building is where I want to place these model lines.
Now I've created two corresponding elevations to go along with these as well. And once again here in the reveals mode when you zoom in, you start to see the problem. You can see how dense and overpowering that reveal brick joint is. It's just way too heavy but if I go to the model lines view and we draw a model line here instead you're going to be able to compare and see that it's going to look a lot better. So let me zoom in a little bit on this brick wall and one other point that I want to make is that we actually have two kinds of lines in Revit.
We have model lines and we have detail lines. So let's start by showing you those two just so that we understand what the difference is. So on the architecture tab I've got a model line tool right here. LI is the shortcut. Because it's a model line its actually drawing in 3D space. So it's going to ask me for a work plane. So I'm going to do pick a plane and I'm going to pick the surface of the wall. Now so that was can tell these apart, okay, I'm going to draw a circle and I'm just going to place it out to here, outside the building. And then I'll cancel.
Now I'm going to go to the annotate tab and click on detail line which is not at all the same thing. And this one I'll do a rectangle and draw it like so. Now the reason I say its not all the same thing is because the detail line only appears in the view that it was drawn in, in the model lines elevation. If I go to the model lines 3D view, notice that the green circle appears here because its a model line but notice the rectangle is not here because it was a detail line. So make sure that if you want to use this technique that I'm sharing with you to do your control joints that you actually use a model line.
Because if you use a detail line then you'll get to your 3D view and they won't appear, okay? So let me go back to the model lines elevation view and I'm going to delete this geometry here, both kinds of lines and then instead I'm going to zoom in on the wall here and create a model line on the surface of this wall to represent my control joints. So back to architecture, click on model line and the other thing you might have noticed when we created the circle is it came in green. That's because the default line style here was just set to lines.
That's a green line style. Now we have other choices; medium lines, thin lines, wide lines and if you want you can actually create your own custom line style. So to do that I would go to manage, go to additional settings, and choose line styles. Select the lines category. Click new and give it a name. Once I've created control joints you can give it a line weight, a color, and a line pattern. I'm going to accept all the defaults, pen weight one, black and solid line.
Click OK and now if I go back to modify place lines and click the drop down, control joints is one of the choices. And I'm going to place this at the brick joint right next to the door and pull it straight up. So you notice how it snaps right to the brick pattern quite nicely right there. And because it's only a pen weight one its not anywhere near as overpowering as that reveal was. Now I'm going to go ahead and select that line and I will copy it next to itself maybe 20 feet away and then continue to copy another 20 feet away and now I have these three control joints spaced at 20 feet on the surface of this wall and more importantly because these are model lines, when I go to the model lines 3D view, they're going to appear here as well and when you zoom in it stays that single pen weight one thickness.
It doesn't have that overpowering double edge there that you get with the reveal. So I think model lines are a great way to represent these kinds of details that you want to see in all your views. You want to see them in plans or in elevations or in 3D but you don't want them to be full blown 3D models that really start to overpower the entire surrounding geometry. So it's a great alternative to actually building things in 3D. One of the keys to success with Revit or with building information modeling in general is not only knowing how to build things or how to model things but knowing when to model them.
Okay, so if you think about things carefully and you make decisions and you say hey in some cases I'm not gonna model this, I'm going to use a model line instead or some other technique instead that can often mean the difference between projects that perform well and that serve all the needs they are meant to serve and those that don't. Keep this trick in mind. Keep the idea of using model lines in mind. It's great for any of these smaller details that really don't need to be modeled in full blown 3D.
First, get comfortable with the Revit environment, and learn to set up a project and add the grids, levels, and dimensions that will anchor your design. Then author Paul F. Aubin helps you dive into modeling: adding walls, doors, and windows; using joins and constraints; creating and mirroring groups; linking to external assets and DWG files; and modeling floors, roofs, and ceilings.
Paul also shows advanced techniques for modeling stairs and complex walls, adding rooms, and creating schedules. Finally, discover how to annotate your drawings so all the components are clearly understood, and learn how to output sheets to DWF, PDF, or AutoCAD.
- Understanding BIM and the Revit element hierarchy
- Navigating views
- Creating a new project from a template
- Adding walls, doors, and windows
- Adding plumbing fixtures and other components
- Linking AutoCAD DWG files
- Rotating and aligning Revit links
- Working with footprint and extrusion roofs
- Adding openings
- Adding railings and extensions to stairs
- Creating stacked and curtain walls
- Hiding and isolating objects
- Adding rooms
- Creating schedule views and tags
- Adding text and dimensions
- Creating new families
- Using reference planes, parameters, and constraints
- Plotting and creating a PDF