Join Eric Wing for an in-depth discussion in this video Configuring sloped concrete framing, part of Creating Concrete Buildings with Revit Structure.
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Of course, not all slabs are created leveled. Actually most aren't. That's fine. We can deal with that. The objective of this video is to create some framing that is pitched in multiple directions. We will then place a slab on top of that framing, and then select the Pixel Ports command to snap the slab to the framing. To get started, let's start a brand new project using the structural template. So under projects, click structural template. Now what I want to do is under structural plans, let's go down to level one.
Let's throw some columns in. Lets go to the structure tab. Lets click the column button. Lets click the drop down. Lets grab some 18 x 24's. We're on level one, so lets make sure our height is set to go up to level two. Go ahead and pick a point right about here. Let's hit escape. Go ahead and select your column. Let's click the copy button. Let's make sure constrain and multiple are both checked on. I'm going to pick a point right about here. I'm going to come over 25 feet, and I'm going to pick a point. I'm going to come over another 25 feet, and I'm going to pick another point. And I'm going to hit escape a couple times.
I'm going to pick a window. Round off three of these columns. I'm going to click the copy button. I'm going to pick a base point. I'm going to come down to, you guessed it, 25 feet. Let's do another 25 feet. And let's hit escape a couple times. Now, let's go on up to level two. In level two, let's pick a window around these three columns in the middle. Let's alter our top offset. Let's all set down to -1 foot and hit enter. Let's hit escape a couple of times.
What I'd like to do next is go to a 3D view, just to make sure they're different. In our 3D view, let's set the visual style to realistic. In our view cube, let's go ahead and navigate around to the front. Just to make sure that our middle columns are lower. If you hold down the shift key, we can navigate around, and look at it in more of an isometric view. Let's go down to level two. Now let's start adding some framing. On the structure tab, click the beam button. Instead of a w shaped wide flange, let's click the drop down.
Let's grab a 12 by 24. Placement plane, of course is level two. Automatic structural usage, but this time, let's make sure 3D snapping is turned on. We'll turn the chain button on, but you'll see it doesn't work when we get to an odd height. So go ahead and hover over the center of this column. Notice now you get a point. Instead of a normal midpoint snap marker. Go ahead and click this. Now come over and click it right here. Notice that rabbit's telling us, this side's 0 feet, this side's -1 foot. Go ahead and click this point. And then click this point.
Rabbit gives us the same information. What if the chain is broken? Go ahead and click this point, this point and keep going around until you have everything framed in. One, two, I'm just going to finish it off across the middle. And hit escape a couple of times. Because I'm never sure, I'm going to go to a 3D view. I'm going to hold down my shift key, and my wheel button, I'm going to pan around, I'm going to notice now that my framing is definitely sloped.
Let's go back down to level two. Now, let's place a floor slab. On the structure tab let's click the floor drop down let's go to floor structural. In the properties, let's click the type selector drop down, let's go to 6 inch concrete. The level is level two of course. But let's set the height offset from lateral 6 inches, the thickness of the actual slab. Now on the job panel, we're going to click on the pick supports button. I'm going to pick this support. And this support, this one, and this one.
I'm going to hit escape a couple times. On the modified panel, go ahead and click trim extend to corner. I'm going to pick this guy, and then this guy. This guy, and then this guy. Two more. I'm going to hit escape. I'm going to click the green check mark button. Now I'm going to go to a 3D view. Now we'll see that the floor is not quite stuck to the framing. Also what we'll see is the analytical plane is pushed up. What I want to do, to avoid confusion, is I want to turn all of our analytical items off. To do that, we're going to go to Visibility Graphics to turn them off.
Go ahead and type in VG. Now let's go to Analytical Model categories. And let's click on the All button. Just click any one of them to turn them all off. Click Apply, then click OK. Now, I want to select my slab. Once the slab is selected, notice that we have a shape editing panel that shows up. What I want to do is I want to grab pick supports. I'm going to start going around, and I'm going to start picking my framing. Just going to start working my slab, to whatever framing members I pick.
I pick these two, I pick the two up the middle. I'm going to come around to the front. I guess I'm going to pick these guys for good measure. Now let's hit escape a couple of times. Notice now that our floor is going to be warped to that framing. This is what you would do when you have a pitch steel condition. So now when our pitch changes, so will our slab.
- Creating levels
- Creating a structural grid
- Adding single and multiple columns
- Laying foundations
- Creating perimeter framing and pan joists
- Placing concrete slabs
- Reinforcing with rebar