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Refining a layout with temporary dimensions

From: Revit Architecture 2013 Essential Training

Video: Refining a layout with temporary dimensions

A very important basic concept to understand in Revit is the way that precision is approached. In Revit what you typically do is you place objects in a general location and then you refine the placement of those objects over time. So I call this sketch and then modify. So in this movie we are going to talk about temporary dimensions and temporary dimensions is a process that we use to take our roughly-placed objects and modify their positions to a more precise location. So what I have here on screen is a file called Temporary Dims and this is just a copy of the completed grid layout from the previous movie.

Refining a layout with temporary dimensions

A very important basic concept to understand in Revit is the way that precision is approached. In Revit what you typically do is you place objects in a general location and then you refine the placement of those objects over time. So I call this sketch and then modify. So in this movie we are going to talk about temporary dimensions and temporary dimensions is a process that we use to take our roughly-placed objects and modify their positions to a more precise location. So what I have here on screen is a file called Temporary Dims and this is just a copy of the completed grid layout from the previous movie.

The grids here have been placed in rough locations, but I want to start controlling these grids in a very precise way. I want the measurement of the grid lines to the face of the walls to be controlled very precisely for example. And I can do that in a variety of ways in Revit and the first way that I want to share with you is using temporary dimensions. So I am going to start by selecting grid line A. What you'll see is on screen here, in addition to all the other little controls and grips that appear, you'll see a couple of dimension strings appear here and here.

I am going to zoom in slightly, just to get a better look at this, and you'll see that the dimension number is here and it's got kind of a long, random fractional number to it, and a second dimension is here. You'll see these little blue dots, showing me the Witness Line locations of these dimensions and what they're measured to. In both cases, on the left and right, they're measured from the grid line and then back to the center of the wall. That's the default behavior. So if I know what this value is, if I know how far off the wall I want this distance to be, all I have to do is click in that dimension and make the change.

Now this exterior wall is a generic 12- inch wall, you can see it there when I highlight the tooltip, that means that if I want this grid line to be 2 inches off the inside face of that wall I could do the math and I could say, well, half of the distance of the wall is 6 inches plus the 2 inches so I could click right here and I could put in a value of 8 inches. Now the way that you put in inches in a Revit project is to either do 8 inches or I'll show you a second way in a few moments here. And I am going to press Enter and you'll see that we'll move that grid line over closer to the wall to maintain that distance.

Now I am going to select this grid line and I want to do a similar modification, but perhaps I don't want to perform the math this time, maybe I don't want to do the calculation. What I can do instead is using these little small circles here I can actually click those grips and they will jump to other points on the wall. When I click it, it jumps to the inside face, if I click it again it goes to the outside face, and then one more time it's back to center. I want to do it from the inside face so I'll click it again, and now the current distance is 3 feet, I click on there, and this time I want it to be just 2 inches.

Instead of writing 2 inches which I did a moment ago my alternative is to do 0, space, 2. When you're working in an imperial file you do the feet first, then a space, and then the inches. And so in this case 0, space, 2 will be interpreted as 2 inches. You can do two with the inch symbol or 0, space, 2, the choice is up to you. They both achieve the same result. So let's do it again, change my Witness Line location, pick in the dimension, 2 inches, go to another location, one more time, the dimension is way over here this time, click right there, click in the value, 0, space, 2.

So again, the same result in both cases whether you do the space or whether you do the inch symbol. So I could continue to work my way around, this one here you can see the dimension line goes off screen, there it is right there, click the witness line grip, click in the value, and then the final one over here, click right there, click in the value, 0, space, 2. Now that positions all of the grids that are associated with an exterior wall in their correct locations, however sometimes you know the distance of a grid off of something other than a wall.

Now if I select this one what you are going to see here is, it's measuring still back to the center of this wall, 24 feet in this case. Now if I knew what the distance was off of that wall then I could edit that dimension, but where I'd rather measure it to, is to the gridline C, to the neighboring grid line. So it's often the case where you'll know the measurement to some other piece of geometry. Well simply clicking the little blue circle won't do the trick, it'll jump two points on the wall, but it won't actually jump to the grid line.

So what you do instead is you drag it, so click the little witness line grip, hold-down, and you see now that I'm dragging, I can highlight nearby geometry like grid C, let go, and now I've associated that dimension to that nearby geometry, and I can click in here and put in a value. Now in this case, my value is in feet and inches and the value that I want is 31'8. Now I can do it with the foot symbol, which is just the apostrophe mark, or 31, space, 8.

Both would work, it's entirely up to you whichever method you prefer, press Enter, and you'll see grid line D move in order to maintain that new dimension. So an important aspect of temporary dimensions to understand is, whatever you have selected is what will move with the temporary dimensions. If I select grid line C, even if the dimension was measured back to D here, there is the 31'8, if I click in here and change it to some other value notice that grid line C moves in this case.

Now I am going to undo that with Ctrl+Z. So it's important to always pay attention to which object you select, and then that's the object whose dimension you modify. So often in Revit you are going to start with a rough idea of what you want, whether it be walls or grids or some objects, you are going to lay them out in a very rough fashion and then you are going to come back using the temporary dimensions and do a series of refinements. We call this sketch and then modify, and it's a very common way to approach editing with precision in the Revit environment.

In fact, the word Revit actually stands for revise it. So the name of the product comes from this notion that we start with a simple sketched out layout and then we progressively refine it and refine it as we learn more about our design. Temporary dimensions is just the first of many ways that we have to do that.

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This video is part of

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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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