Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Using constraints

From: Revit Architecture 2013 Essential Training

Video: Using constraints

So I am going to add a little bit more smarts to some of the dimensions here in my files. So Revit offers us a few different kinds of constraints that we can work with and I'd like to show you a few of those here. So I'm in a file called Constraints and this is just a version of our two bedroom condo, and I'm going to start in this area down here, just zoom in a Region on this closet here. And you can see two small problems, one is that I don't have a whole lot of room for the doorway right there, so I might want to reduce the size of this closet slightly, and two, this door in the closet is not centered.

Using constraints

So I am going to add a little bit more smarts to some of the dimensions here in my files. So Revit offers us a few different kinds of constraints that we can work with and I'd like to show you a few of those here. So I'm in a file called Constraints and this is just a version of our two bedroom condo, and I'm going to start in this area down here, just zoom in a Region on this closet here. And you can see two small problems, one is that I don't have a whole lot of room for the doorway right there, so I might want to reduce the size of this closet slightly, and two, this door in the closet is not centered.

Now perhaps I am going to consider a few different positions for this door, so what I can do is build a relationship between the door and the closet. And it's going to start with a permanent dimension. Now up until now we've done everything with temporary dimensions, but up here on my Quick Access Toolbar is the Aligned Dimension tool, the shortcut is D I. Permanent Dimensions are just as their name implies they remain a permanent part of your drawing file, they don't go away in other words when the objects are deselected like temporaries do.

Now you could see here that it's defaulting to highlighting the centerline of the wall and there's two ways I can change that, I can use this dropdown over here on the Options Bar, or I can press the Tab key on my keyboard to shift to one of the other faces. Now in this case I move my mouse slightly to the exterior face and I am able to tab between center and exterior, if I move my mouse slightly to the interior face I can tab between those two choices. And I want to go to the exterior face and that's going to be my first witness line location of this dimension.

Then if I move around on the door you'll see there's lots of choices inside the door that I can use, and I am going to locate this centerline of the door right here, and then finally use my Tab key again to get the inside face of this closet, and the final click is to place where I want to dimension to go. So I've got the three witness lines and then I'll just place the dimension out here somewhere. Now you could see the numbers are completely random. There is a few little controls floating next to the dimensions, I'm going to talk about the locks in just a few moments, we are going to look at this one right now, Toggle Dimension Equality.

If I just simply click that, that will actually move the position of the door and center it between the two witness lines that I asked for. I am going to click my Modify tool to cancel out of here, and now I am going to select this wall, and this is where we start to benefit from this constraint. The Equality constraint is not a one time operation, in other words, it didn't just move the door and that's it. It's an ongoing live constraint or what I'm calling smarts here. So I'm going to select this wall, click on this dimension and I am going to make that number 4 feet.

And notice that when this wall moves, that Equality Constraint is maintained and the position of the door shifts as well. So you could move this wall to several locations and you'll see it will continue to modify and update, I am just going to use my dimension here and set it back to 4 feet. Now let's look at another example of some smarts. We'll look at that Lock constraint next, I'm going to zoom over here, I just use my wheel to drag over and zoom, and I'm going to come up and choose my Align Dimension again or DI, highlight the wall, press my Tab key to get the inside face, and this time I can actually choose the face of the door and set a dimension here.

And let's say that this dimension is important enough to me that I want to make sure that gets maintained even if the closet shifts around. All I have to do is click this small little Lock icon right here, that will lock that dimension and now if this wall were to move it will maintain that relationship with the door. The door has to stay in that location, it doesn't matter whether I move it left or right. I am going to go ahead and undo that. Okay, but I am going to leave the Lock. Now let's look at one more example. Loaded here in the background I have another file called Equality, it's also included with the exercise files, let's open that up.

I am going to Zoom in Region here on these four offices. We'll be working more with this file later in the course, but for right now I've got the file provided and you could see that these four offices are all different sizes. So using my dimension one more time, Align Dimension, and highlighting each of these walls, and I am just doing the center lines right now and I'll place the dimension out here. So just like we saw a moment ago I can click the little Equality Toggle and it will respace all of those walls and make all of these offices equally sized.

It's a live constraint just like the others so if I move one of the walls you'll see it re-spaces all of the walls accordingly. Now I am getting an error here because that was kind of a sloppy change because now all these walls are intersecting these doors, and Revit saying just so you know you've got walls right in the middle of your doors there, so you might want do something about that. So what I'm going to do about that is just simply undo, but you see that the offices are now all equally spaced. Now as the last thing that I want to show you here in this movie, the Equal, Equal what we're seeing here on the dimension string we can actually customize, okay.

So this is a permanent dimension, as you can see when nothing is selected the dimension remains on screen, and what Revit defaults to is showing the little EQ symbol on each of those dimensions. So it doesn't actually tell us what those values are, but you can change that if you want to. I am going to select the dimension and over here on the Properties palette you have actually three choices, the Equality Text is what we're seeing, the EQ. We can also choose the Value and if I apply that you'll see it actually shows the numerical value and they're all the same. Or new in 2013, we have this feature here Equality Formula.

Now if I choose that and I apply it the formula that it's defaulting to is not a very useful formula, because if I keep the dimensions selected and edit its type, now you may recall we talked about the difference between Instance and Type Properties in an earlier movie, we were talking about walls at that time, but annotation objects like dimensions also have Instance and Type properties, and so if I edit the type of the dimension string and scroll down, the formula is controlled down here.

So the Equality Text is EQ, that's where we could change that. So if you wanted to write out the word Equal, remember earlier we were seeing EQ repeated, we could change it there. The Formula here is just set to Total Length, which is why I am seeing just the total length of the dimension, which is probably not very useful. So I'm going to click this button, and in this dialog I am going to select Total Length and I am going to remove that, and then over here I have different things that I can include.

So what I'm going to say is Number of Segments and I'm going to add that, and then the Length of the Segment and I am going to add that, and then as a suffix to Number of Segments I'm just going to put in the @ symbol, just like you would use in email, and I am going to click OK, and OK again, and now I'll get something that I think is a little bit more useful. It's telling me I have 4@ and then the distance of one of those segments. And of course you could do any variation you want. So I encourage you to go to Edit Type and play with some other combinations until you arrive at the one that matches your office standards.

So you can see that using either Lock Constraints or Equality Constraints adds an additional level of smarts to our models and they're not only one time modifications that give us value but they are ongoing constraints that remain applied until we choose to come back and remove them and help maintain design intent in an ongoing fashion.

Show transcript

This video is part of

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

96 video lessons · 13030 viewers

Paul F. Aubin
Author

 
Expand all | Collapse all
  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

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ .

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Revit Architecture 2013 Essential Training.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member ?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferences from the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Learn more, save more. Upgrade today!

Get our Annual Premium Membership at our best savings yet.

Upgrade to our Annual Premium Membership today and get even more value from your lynda.com subscription:

“In a way, I feel like you are rooting for me. Like you are really invested in my experience, and want me to get as much out of these courses as possible this is the best place to start on your journey to learning new material.”— Nadine H.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.