- [Voiceover] The theme of the movies in this chapter will be sketched based objects. What I mean by sketched based objects is any object in Revit that we have to create a two-dimensional sketch in order to indicate the shape and overall form of the object. There are certain objects that Revit just can't automatically assume the shape and form for you. When you draw walls, and doors, and windows you really only need a click or two and Revit can do the rest. But when you want to draw elements like floors, and roofs, and stairs, and railings these objects require a little bit more input from you in terms of what the shape and the overall form is.
So in this movie we're going to start our exploration of sketch based objects with a look at the floor element. So I'll start here in my First Floor plan and we're going to go to the Architecture tab and I can click on the Floor button. Now if you use the drop-down it's just this first option right here, Floor Architectural. Now that takes me into Sketch mode. How do I know I'm in Sketch mode? Well, there's a couple of clues onscreen, the drawing window will gray out and the ribbon will change to this green tinted color. Now in addition to that there'll be a Mode panel and it will have a big red X and a big green checkbox and those buttons are important because those are the only two ways out of Sketch mode.
You press Escape it doesn't work, you click the Modify tool it doesn't work. The only way to get out of the Sketch mode is to click the red X if you've changed your mind and you want to cancel and the green check mark if you want to finish. Now sometimes folks will wander of onto other ribbon tabs, I don't recommend doing that, notice that most of the tools are grayed out anyway and you can't really do anything in those locations. So the best thing to do when you're in Sketch mode is just stay on the Modify tab, all of the tools you need are right here. Now when you're creating Floors it's often the easiest to create them from existing wall geometry and all of the defaults are already set up that way.
So if we look over here on the Draw panel we're drawing Boundary Lines, that's the default, and that's going to be the shape of our Floor that we're going to sketch out in 2D. Then we've got this Pick Walls option right here, now we certainly could use Lines, and Rectangles, and Circles but with Pick Walls I'll be able to use the existing walls in my model to build my Floor Front and so that's a really handy feature. And then finally, we've got this checkbox right here which says, "Extend into wall core," now that's really helpful as well because it will actually sense the core of the wall and it will put the sketch line there.
So I can illustrate that if we just zoom in a little bit, maybe right here, and then I'm going to click to create my first sketch line on this Wall. And notice when I click that Wall it put the sketch line at the face of the core. Now it can actually put it on the exterior face or the interior face and you could use this Flip Grip right here to change it at any time. So I want to make sure it's on exterior face of the wall, I'll do my Previous Zoom, and let me continue clicking exterior walls all the way around the plan.
Now here at the front, this is actually in two pieces so there's a wall here and another wall here, and you could click both and let them touch end to end but what I actually prefer to do is go to my Trim and Extend command and then just trim up this last corner, like so. A Floor sketch has to be an enclosed sketch so you have to make sure that all of your corners are touching one another and they're all nice, clean intersections. When you've got the sketch finished you can come up here and click the green Finish checkbox to finish the Edit mode.
Now when you do that you'll get a message from Revit asking you if you want the walls that are underneath this floor to attach to the floor itself. Now sometimes that's a good thing to do and we're going to do that with the next floor that we build but actually in this case I'm going to answer No. And I'll be able to show you why we answered No when we cut a section in a few moments so for now we'll just kind of postpone that and continue on. Now notice that the Floor slab is still selected, you can see it highlighted all the way across the plan here. And if you wanted to make any changes to it there's actually an Edit Boundary button here on the ribbon so I could click that, that would take me right back into Sketch mode and I could make whatever modifications I wanted to make so if there was a change that I needed to make to the shape of the floor I could do that.
Now in this case, I don't actually want to keep that change so to cancel the mode, again, you don't press Escape, or Undo, or anything like that, you click the big red X here and it will confirm that you want to cancel and you'll say Yes. All right, so now let's move up to the second floor and create another floor slab up there. So I'm going to go to Level two Floor Plan and here we only have the second floor on this left hand portion of the Plan and what I'm going to do is go back to Architecture, click the Floor button again, accept all the same defaults, Boundary Line, Pick Walls, extend into core, and I'm going to start clicking these exterior walls here on the second floor.
Now I'm only going to do the ones on the left. Right over here in this location is a double volume space looking down into the reception areas so I don't want to put a floor there so what I'll do instead is use my Trim/Extend to Corner, I'm going to pick this line right here and then make sure I'm picking the left side of the line up above so that it will trim up and create a nice rectangle there. Now, if I zoom in over here at the top of the Plan naturally if these stairs are meant to take me up to the second floor I'm going to need to make a modification to the shape of this floor in order to achieve that.
So what I'm going to do here is this time because I don't have any walls to pick here I'll just draw those with simple line segments. So I'm going to start right here at the end of the stair, draw a line to there and then another one running vertically along here, click the Modify tool to cancel, and then I'll go to Trim and Extend and clean it up. Remember with Trim and Extend you always pick the side you want to keep, trim that up here and then I'll click Finish again.
Now this time I'll get that same message again about the walls that go up to the underside of this floor. Now here, we're talking about the office walls, for example, on the first floor so this time I'm going to say Yes so we can see a difference. Now I'll get a second message which will ask me about the perimeter and I'm going to say Yes for that one as well. Now to show you what both of those yeses did let me zoom out and cut a section through my building. Sections are really handy to help you understand what's going on with the structure of your model.
So you draw a section by just clicking two points onscreen so I'm going to start over here near grid line three, click a point, and then draw it straight across horizontally, and click another point like so. You'll get a dashed box here indicating the extents of the section. I'm going to click away from it to deselect it and then I'm going to double click on the blue section head in order to open it up. Now to understand what we've got here a little bit more clearly, I'm going to change the detail level to Medium so that we display the internal components within the walls.
And then I'll come over here and zoom in in this location right here. Now, the first question asked about, if we wanted the walls that went up to this floor to attach to their bottom, so this wall we answered Yes, and as you can see it's attaching to and cleaning up with the floor over here. This one we said No, and hopefully now you can understand why we said that, because that would have chopped this wall down to here and we'd have this unnatural kind of notch right there so that wouldn't have been desirable.
The second question asked if we wanted to join the floor slab with the perimeter walls and there we said Yes and you can see what that's done. The floor slab penetrates in and through the core and then the wall has carved out a small pocket to receive it. Now if you don't like the way this floor is overlapping this wall we actually have a tool that can fix that. We can go to the Modify tab, click this Join Geometry command, you select the perimeter wall here, and then you select the floor there. Now you may need to do that in other locations as well but that will clean up that condition.
Now one last thing I want to point out about the way that we built these floors, when you use the Pick Lines feature you're actually creating a relationship between the wall and the floor and what I mean by that is, if I were to take this wall here and actually move it out here notice that the two floor slabs stay connected to that wall and extend along with it. So by simply moving the wall, we're actually modifying the sketch of the floor as well, that's a very powerful feature so Revit's always looking for opportunities to build relationships between the different parts and pieces of your models.
So that's a look at our first sketch based object. Creating floor slabs is as simple as going into a Floor Plan and drawing out the shape that you want that's (mumbles), when you click Finish Revit creates the 3D geometry for it. We use the Pick Walls feature here to make the sketching easier but you can actually draw floor slabs using any of the normal Sketch tools.
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; creating and mirroring groups; linking to external assets and DWG files; and working with floors, roofs, and ceilings.
Paul also shows advanced techniques for modeling stairs, complex walls, and partially obscured building elements, as well as adding rooms and solid geometry. 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