Join Paul F. Aubin for an in-depth discussion in this video Creating floors, part of Revit 2018: Essential Training for Architecture (Imperial).
- [Voiceover] The theme of all the elements in this chapter will be sketch-based elements. Now what I mean by sketch-based elements is any element that requires you to create a two-dimensional sketch in order to indicate the shape or form of the element. If you think about all the elements we've created up till this point, things like walls, doors, windows, components, they really only required a click or two. But when you start getting into elements like floors, roofs, stairs, railings, you're gonna actually have to draw out a sketch to indicate the shape of that element. For example here in this movie I want to look at the floor element.
And I wanna create a floor that matches the footprint of this building shape. So to do that I'm gonna need to sketch out that floor shape. So let's start by going to the architecture tab and clicking on the floor button. Now the floor button is a split button and the primary button right here is all you need to click, but if you do use the drop down it's actually floor architectural that we're clicking here, and that's the default button right there. So you can choose it here or here. And that will take you into sketch mode. Now there's a few clues that you're in sketch mode.
The first is the model canvas greys out. So as you can see everything in the main model canvas window is now in sort of a half tone display. The ribbon tab tints in a greenish color. And we're taken over to the modify, create floor boundary tab. Now on the ribbon you have a mode panel and that has two primary buttons. A large red X and a big green check box. Those are the only two buttons that you can use to actually get out of sketch mode. So after you've drawn your sketch and you wanna complete you use the finish edit mode button.
If you changed your mind and you wanted to cancel the command you would use the cancel edit mode button. Pressing Escape or clicking the modify tool does not actually take you out of sketch mode. All that does is cancel the current operation within sketch mode. So that's why it's really important to understand the way sketch mode works. A common mistake that a lot of users make, especially new users, when getting into sketch mode the first time is they start clicking on the other tabs wondering why things changed on the screen. Well notice that everything is greyed out on these other tabs and all you really can do is kind of get further lost here, then you start pressing the Escape key and panicking a little.
Stay on the modify tab is the best advise I can give you when working in sketch mode. And if you changed your mind about being here you use the red X. Okay, so let's talk about the default settings in sketch mode. Notice that on the draw panel there are three draw modes, boundary line, slope arrow, and span direction. And boundary line is already selected by default. That's what we want, because we're gonna be drawing the edges of this floor slab. What shape do you wanna draw those edges in? Well, you can do lines or circles or arcs, so we have a lot of choices, but by default the pick walls option is already chosen.
Now pick walls is really handy, because it's gonna allow me to simply click on an existing wall in the model and sketch over that wall. Now when you have pick walls chosen the extend into wall to core check box will also be enabled by default. And that is a really handy feature, because if I zoom in on this sketch line that I just created what you'll see is that that sketch line actually went to the face of the core. So if I click this wall right next to it notice it doesn't matter where I click the wall, I could click way out here, it will put the sketch line on the face of the core.
Now when you create a sketch line it will have a flip grip and that's gonna be off screen here, if I pan, right there. And if I click that it will flip it to the inside face of the core. So you can either be to the inside of the core or to the outside of the core. And in this case I think the outside of the core makes a little bit more sense. Now I'm gonna do Z + F to zoom to fit. And I'm gonna continue clicking the exterior edges of the building. Now here you can see that there are two walls, so I'm only gonna pick one of those, because I prefer to have just a more continuous sketch.
Now Revit really doesn't care, you could pick both of them if you want to, but what I prefer to do instead is use my trim and extend to corner tool, select this sketch line and this sketch line to kind of clean up that corner. Now the primary rule of sketch mode is that you have to have a valid sketch. And in the case of a floor that has to be an enclosed shape. So it has to be closed all the way around. If it's not, when you try and finish Revit will generate an error. But in this case, because I've gone all the way around the shape of my building I should be fine.
And when I click the finish edit mode it will create the floor. Now it's asking me if I would like the walls that go up to this floor to attach to the bottom. I'm gonna talk about what this question means in a moment, so for now I'm gonna actually click no. And I'll explain why momentarily. Okay, so the floor's object is created and you can see it remains highlighted on screen as it's selected. If you looked at the shape of this floor and realized that you wanted to change it in some way. Notice that on the ribbon there is an edit boundary button. That would take you back into the sketch mode and you could grab any of the sketch lines and make whatever modifications you wanted to make.
So even though we used pick walls to initially create the sketch it doesn't actually have to be picked walls. You can move those sketch lines anywhere that you like. I'm gonna actually click the red X here and cancel those changes and answer yes when it asks me to confirm that. So I don't actually wanna change it in any way. Okay, so that's our first floor slab. Let's go up to the second floor now and create another one. So I'm gonna go to the level two floor plan here and I will return to the architecture tab, click the floor button again.
Again, remember you only have to click the default button, that'll take you into floor architectural. And notice all the same defaults occur here. Boundary line, pick walls, and extend into wall core. So once again, I'm gonna pick the exterior walls here, but only those four. In this area here I have a double volume space, so I don't want the floor to go all the way across, so I'll just use my trim and extend and trim here to here. Now remember, if I undo that, pick the side you wanna keep. So if I were to pick here and here notice that I get the wrong sketch.
So it's important that you pick over here to the left and then this one down here to kind of close that off. Now if I zoom in in this general location that floor would not work quite so well, because we'd have no way to get off the stair and up to the second floor. So what we can do is actually switch tools and I'm gonna just use the basic line tool at this point, I'll snap right to the stair, draw that over here, snap right to the stair again, draw it maybe to this wall, and then I'll click the modify tool to cancel.
Now I need to trim that up. If I tried to finish right now, this is the error I was talking about earlier, notice it will say lines can't intersect each other and it'll complain basically that this is not a valid sketch. If you quit sketching it cancels the whole floor operation and deletes it. What we wanna do instead is click continue and clean this up. So I'll go to trim and extend, and do this line to this line, and then this one, remember to pick the side you wanna keep, so don't click here, click the lower portion, and that one to that one.
This time when I click finish it'll make a valid floor. Now I'm gonna get that same question again, do I want the walls that go up to this floor to attach to the bottom. So this time I'm gonna say yes, and again, I'm gonna show you what that does in just a moment. And then a second question appears that's highlighting the exterior walls and it's asking me if I wanna do join geometry in those locations. And let me say yes there again and now in order to explain to you what just occurred I need to create a section.
So you can get to the section tool on the quick access toolbar, and it just requires two clicks. So I'm gonna click starting outside the building and then make sure I'm going all the way across the primary space here. And notice this dashed line will automatically sense where the extent of the building is and anything within that dashed box is what's gonna be included in the section. If you click next to it to deselect it you can then double-click on the blue symbol to open it, or you can select the line here, right-click, and choose go to view.
Either one will open up the section view and allow us to see that view that's been created. Now I'm gonna zoom in over here in this location and you can see this floor is the one we created on the second floor connecting with this wall. Here's the floor on the first floor that we created and it's not connecting with this exterior wall. So let's talk about what those two questions asked. The first question asked about walls that went up to the floor's level and if we wanted them to attach to the bottom. Had we answered yes there then it would have taken all of these exterior walls and the manual way to do that command is to select the wall and click this attach top and base, and then click the floor, and do you see what it would have done? It would have dropped those foundation walls down and stopped them at the floor.
And you'd have this unnatural gap right here. So I'm gonna undo that. Okay, so that's why I answered no the first time. Now in this case I answered yes, so I'm gonna detach it to show you. If I had said no there this wall would have continued up through the floor. So the reason I said yes there was because it looks nicer to have that wall stop at the underside of the floor. Now at the perimeter it was a different question. It asked if we wanted this floor to join geometry with this floor.
Now if I go to the modify tab and choose unjoin geometry right here on this small drop down you'll see that's what it would've looked like had I said no to the second question, but because I said yes it cleans it up nicely and you get a condition like that. Now it turns out that join geometry would be a better choice here if you want this to be cleaned up, so you can select this floor and join it to that wall and that'll give you a nicer connection there than what would have offered to do on its own.
So usually when I'm drawing floors I actually like to create the section first and have both views open on screen, so that I can kind of see what it's giving me and then make better decisions about whether to join or choose the attach option. So creating floor elements involves going into a sketch mode, you can use the existing wall geometry, or just simply draw the lines yourself, create an enclosed sketch, and then when you finish it creates a floor slab for you in the proper thickness.
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