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Working with footprint roofs

From: Revit Architecture 2013 Essential Training

Video: Working with footprint roofs

Revit offers us a few different ways that we can create roofs. In this movie I will look at the Footprint Roof option. Footprint Roof option is very similar to creating floor slabs that we looked out in the in the last movie. We sketch them out as a 2D sketch and we do that sketch in a Plan view. Now I'm here in a file called Footprint Roof and I am currently in the level 1 floor plan. Now there is actually two roof plans in this file, there is a High Roof and a Low Roof and so I am going to double- click the High Roof to make sure that I'm working in that view.

Working with footprint roofs

Revit offers us a few different ways that we can create roofs. In this movie I will look at the Footprint Roof option. Footprint Roof option is very similar to creating floor slabs that we looked out in the in the last movie. We sketch them out as a 2D sketch and we do that sketch in a Plan view. Now I'm here in a file called Footprint Roof and I am currently in the level 1 floor plan. Now there is actually two roof plans in this file, there is a High Roof and a Low Roof and so I am going to double- click the High Roof to make sure that I'm working in that view.

Now the High Roof is the left-hand portion of the building and the Low Roof is over here on the right. So we'll start with the high one. On the Architecture tab we have a Roof button, now if you use the dropdown it's actually Roof by Footprint that you want, or that's actually the default button that you can just click right here if you prefer. That takes me into Sketch mode; we talked a little bit about this in the last movie. The drawing window grays out to a halftone. The Ribbon tabs turns in this greenish color, our boundary line and pick walls are our default options again here on the draw panel.

And over here on the Options bar we have some similar options that we had with the floor object, and in this case I want to talk about the Defines Slope option. Now since it is pretty common for roofs to have a slope I thought it'd be appropriate for us to start with this. Now we also have an Overhang feature and I am going accept this default right here of 2 feet; if yours says something different just go ahead and type two feet in there. I click into the drawing window somewhere and if I move my mouse near one of the walls which you'll see is it will highlight the wall but the dash greenline instead of appearing right on the wall this time will actually appear at a distance away, 2 feet in this case, because that's what I set the overhang too.

Now by moving the mouse slightly you can make that go to the inside or the outside, even if you accidentally click on the inside, don't worry about it it's not a big deal because we have the little flip grip right here and I can just click that to make it go to the outside, but we probably want these lines to go to the outside of the building. Now there is a small little triangle that appears on the sketch line, that's because we checked Defines slope. So what you want to do is think of this sketch line as almost like a piano hinge. So if you imagine that that line is hinging then the plane of the roof instead of being flat right there at that edge it's actually going to slope up from that edge.

And how much it's going to slope is controlled by this number right here. The default is this very strange fraction, 619/128/12; basically 7 and 12. I am going to change that to a slightly shallower slope of 4 and 12. Now notice that all I have to type is four and when I press Enter, Revit will see that as a 4 rise and 12 run. So it becomes a 4 and 12 slope. I'm going to come over here and I am going to click this other edge over here, make that 4 and 12 as well, and I am just going to do two more, this one, notice that the corner cleans up automatically here, but not here so we'll fix that in a minute, and this one.

Let me go to my Trim/Extend to Corner, clean this up because like our floor slabs that we talked about in the last movie, you have to have an enclosed shape in order for the sketch to be completed. I am going to click the Finish button right here and if I deselect it so you can get a better look at it, you can see that we've essentially gotten a hip roof. Now the best way to see this is to go to our little birdhouse icon over here on the Quick Access Toolbar, now if I hold down my Shift key and drag with my wheel, I can spin this thing around and get a slightly better look.

Now of course that roof is not really what I had in mind, it doesn't match the shape of the building at all, but what I wanted you to see was that we could very quickly create a roof in a very traditional shape, a hip roof in this case. Now if I select the roof I can actually modify it any time I like. I do that by going to the Edit Footprint button on the Modified tab. I can do that right here in 3D, so if you want to, you can go back to the High Roof roof plan, but I can also modify it here. Now what I want to do is take these two edges at the end here and select them with my Control key and then simply uncheck Define slope.

When I do that if I were to click Finish I get a gable roof. So by deciding which edges are sloped and which ones aren't, you can change the shape of the roof pretty quickly. Let's go to Edit Footprint one more time and let's make this shape match the shape of the building a little bit better. So now I am going to go to my Boundary Line again, pick walls make sure I have my Overhang, but this time I am going to turn off to Define slope, and I am going to add a sketch line here to this wall and here to this wall.

Notice that Revit automatically trims it up at the corners. If it doesn't, you just use the Trim command and do it yourself. I'll click finish and let's take a look at what we got. Now we have still a gable roof, but the gable has that notch taken out of it and it follows the shape of the building. I am going to make another quick roof right over here. This is my low roof down over here, and I'll go to the Roof command and it's going to ask me, because I'm working in 3D, which level I want to associate that roof to.

So I am going to associate it with the Low Roof level, so this is just another way you can do it. If you prefer, you can go to the Low Roof floor plan instead. I am going to turn on Define slope, pick a point right there, change that to a really shallow slope, 2 and 12, then I am going to turn off Define Slope, add a sketch here and here, and then finally I'm going to just draw a line manually on this inside edge right there. Click my Modify tool to cancel.

When I click Finish, because I only sloped one edge, I get a shed roof. Okay, so just by controlling which edges are sloped and which ones aren't you can do quite a variety of different standard roof forms. The Footprint Roof is very similar to a Floor Slab except that typically you are going to apply slope to it, you use the Define slope check box to make any one of the edges a sloping edge and that edge basically is treated like a piano hinge. When you click Finish, Revit will figure out the 3D geometry from your various sloping and non-sloping edges.

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This video is part of

Image for Revit Architecture 2013 Essential Training
Revit Architecture 2013 Essential Training

96 video lessons · 12638 viewers

Paul F. Aubin
Author

 
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  1. 1m 57s
    1. Welcome
      1m 2s
    2. Using the exercise files
      55s
  2. 14m 43s
    1. Introducing building information modeling (BIM)
      3m 0s
    2. Working in one model with many views
      4m 48s
    3. Understanding Revit element hierarchy
      6m 55s
  3. 54m 44s
    1. Understanding the different versions of Revit
      1m 19s
    2. Exploring the Recent Files window and the application menu
      5m 20s
    3. Using the ribbon and the Quick Access Toolbar (QAT)
      7m 12s
    4. Understanding context ribbons
      4m 43s
    5. Using the Properties palette
      8m 31s
    6. Using the Project Browser
      5m 34s
    7. Navigating views: Zooming, panning, and rotating
      5m 57s
    8. The basics of selecting and modifying
      9m 49s
    9. Accessing Revit options
      6m 19s
  4. 47m 6s
    1. Creating a new project from a template
      7m 42s
    2. Accessing a multi-user project with worksharing
      4m 16s
    3. Configuring project settings
      6m 33s
    4. Adding levels
      7m 40s
    5. Adding grids
      6m 23s
    6. Refining a layout with temporary dimensions
      6m 58s
    7. Adding columns
      7m 34s
  5. 1h 11m
    1. Adding walls
      8m 48s
    2. Using snaps
      6m 24s
    3. Exploring wall properties and types
      7m 37s
    4. Locating walls
      7m 27s
    5. Using the modify tools
      9m 32s
    6. Adding doors and windows
      7m 39s
    7. Using constraints
      8m 27s
    8. Adding plumbing fixtures and other components
      8m 39s
    9. Using Autodesk Seek
      4m 19s
    10. Using wall joins
      3m 0s
  6. 1h 11m
    1. Linking AutoCAD DWG files
      10m 59s
    2. Creating topography from a DWG link
      7m 43s
    3. Understanding CAD inserts
      7m 56s
    4. Import tips
      6m 49s
    5. Creating a group
      7m 10s
    6. Mirroring groups to create a layout
      5m 3s
    7. Creating Revit links
      5m 16s
    8. Rotating and aligning a Revit link
      7m 6s
    9. Establishing shared coordinates
      6m 5s
    10. Managing links
      6m 0s
    11. Understanding file formats
      59s
  7. 1h 13m
    1. Working with floors
      8m 57s
    2. Working with footprint roofs
      6m 22s
    3. Working with extrusion roofs
      4m 59s
    4. Attaching walls to roofs
      3m 17s
    5. Using the shape editing tools to create a flat roof
      6m 33s
    6. Working with slope arrows
      6m 0s
    7. Adding openings
      8m 33s
    8. Working with stairs
      8m 4s
    9. Adding railings to stairs
      3m 40s
    10. Working with ceilings
      9m 36s
    11. Adding extensions to railings
      7m 20s
  8. 48m 34s
    1. Creating a custom basic wall type
      10m 18s
    2. Understanding stacked walls
      8m 12s
    3. Adding curtain walls
      8m 17s
    4. Adding curtain grids, mullions, and panels
      10m 59s
    5. Creating wall sweeps and reveals
      6m 26s
    6. Exploring model lines
      4m 22s
  9. 47m 40s
    1. Using object styles
      4m 19s
    2. Working with visibility and graphic overrides
      7m 3s
    3. Using view templates
      6m 13s
    4. Hiding and isolating objects in a model
      6m 37s
    5. Understanding view range
      7m 7s
    6. Displaying objects above and below in plan views
      6m 35s
    7. Using the Linework tool
      5m 21s
    8. Using cutaway views
      4m 25s
  10. 21m 28s
    1. Adding rooms
      8m 15s
    2. Controlling room numbering
      6m 13s
    3. Understanding room bounding elements
      7m 0s
  11. 33m 13s
    1. Understanding tags
      9m 58s
    2. Adding schedule views
      7m 55s
    3. Modifying schedule views
      7m 12s
    4. Creating a key schedule
      8m 8s
  12. 58m 40s
    1. Adding text
      7m 29s
    2. Adding dimensions
      9m 6s
    3. Adding symbols
      4m 42s
    4. Adding legend views
      4m 51s
    5. Creating a detail callout
      8m 31s
    6. Adding detail components
      8m 52s
    7. Using arrays to duplicate objects parametrically
      7m 43s
    8. Adding filled and masking regions
      7m 26s
  13. 41m 29s
    1. Understanding families
      2m 37s
    2. Creating a new family from a template
      6m 29s
    3. Using reference planes, parameters, and constraints
      7m 52s
    4. Adding solid geometry
      8m 40s
    5. Cutting holes using void geometry
      5m 9s
    6. Adding blends
      6m 2s
    7. Completing the family
      4m 40s
  14. 38m 48s
    1. Adding sheets
      7m 44s
    2. Working with placeholder sheets
      5m 24s
    3. Aligning views with a guide grid
      5m 57s
    4. Outputting sheets to a DWF file
      6m 39s
    5. Exporting to AutoCAD
      5m 42s
    6. Plotting and creating a PDF
      7m 22s
  15. 2m 38s
    1. Next steps
      2m 38s

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