Working with interference checking in Revit

00:01

MARTHA HOLLOWELL ORCUTT: Working with Interference Checking

00:03

in Revit.

00:05

In this video, we're going to use the Interference Checking

00:08

tool to do a quick review of ducts and pipes

00:11

that are running in tight spaces in the project

00:14

so that we can make changes at an early stage in the project.

00:18

The built-in Revit Interface Checking

00:20

complements other solutions, such as the Clash Detective

00:24

in Navisworks, which is more flexible,

00:26

and BIM 360 Coordination, which is more automatic.

00:30

The advantage of Revit Interface Check

00:33

is that it runs directly on the design model, which

00:36

means issues can be found and resolved within the same tool.

00:43

I'm working in the small medical center building.

00:46

And you can see that there are plenty of pipes and ducts

00:49

just showing in this 3D HVAC view.

00:54

I'm opening the 3D Ground Level Coordination view,

00:58

and you can see that lights are visible,

01:00

as are pipes for plumbing.

01:03

This is a 3D View shown in Top View mode,

01:06

but you can also rotate this view.

01:10

I'm also going to open the 3D Second Floor Coordination view.

01:15

Having these views open will help us discover

01:18

the location of interferences.

01:21

In the Collaborate tab on the Coordinate panel,

01:25

I'm going to expand Interference Check and select

01:29

Run Interference Check.

01:32

In the Interference Check dialog box,

01:34

I can select from the current project or the linked

01:38

architectural or structural file instead.

01:42

Then, I'm going to select the categories

01:44

that I want to review.

01:48

It's good practice to first make sure your own services are

01:52

clash free before checking it against another discipline.

01:56

Then, you're going to want to check for important clashes,

01:59

such as drainage pipes and foundations,

02:02

which are among the first things built,

02:04

and they cannot be easily resolved on site,

02:07

unlike a pressure pipe that can be routed over an obstacle.

02:12

And of course, you want to make sure there

02:13

are no clashes with the building structure,

02:16

so contractors won't drill holes through the beams.

02:20

Instead of running an Interference Check

02:23

on the full model, I'm going to cancel out of this dialog box,

02:27

and then try another way.

02:31

To limit the number of interferences,

02:33

I'm going to select elements before running Interference

02:37

Check.

02:38

So in the Second Floor Coordination view,

02:40

I selected some of the elements on the back of the building,

02:43

and then I'm running the Interference Check.

02:49

In the Interference Check dialog box,

02:51

I now need to specify which elements I want to check.

02:55

In this case, I'm going to check the ducts and duct

02:58

fittings against pipes and pipe fittings.

03:06

And let's see what happens when I click OK.

03:15

The Interference Report displays with just a few issues.

03:19

First, I'm going to select the Export button

03:22

and create an HTML file that I could share with other users,

03:28

and then I'm going to close the dialog box.

03:33

I've opened the Interference Report,

03:35

and you can see that the three interferences are listed along

03:39

with the element ID for each.

03:41

So if you pass this file along to other disciplines,

03:45

they can use the element ID number

03:47

to find the elements in the project using the Select

03:50

Elements by ID tool.

03:53

But for right now, I'm going to flip back to the project

03:56

and use other options in this case.

04:00

So I'm going to go to the Interference Check.

04:02

And I can click Show Last Report to return to my Interference

04:07

Report dialog box.

04:11

The Interference Report displays with just a few issues.

04:15

I can expand them to see what the interferences are,

04:19

but I don't really know where they are.

04:23

So I'm going to select one of the elements in the list

04:26

and click the Show button to see where they are interfering.

04:37

So I need to zoom out a little to see

04:39

where I am in the project and what the issue is.

04:43

In this case, it's a pipe running through a duct fitting.

04:48

This needs to be corrected.

04:50

I can do this with the Interference Report dialog

04:53

box still showing.

04:56

I'm going to change the Middle Elevation to 10 foot 10.

04:60

That gets me over the duct fitting.

05:02

Now in the Interference Report dialog box, I click Refresh,

05:07

and you can see that that report updates.

05:12

Let's try another one.

05:15

In the next two cases, when I click Show,

05:19

you can see that we have a duct, and then there

05:23

are pipes overlapping them.

05:28

When I select the other one, it's

05:29

the same duct but a different pipe.

05:33

I recognize that these pipes are part

05:36

of a group of parallel pipes, and I need

05:39

to be careful how I fix these.

05:43

So here are the group of parallel pipes.

05:48

Each of these are part of the system,

05:52

and then these two right here are the ones

05:55

that I need to make a modification to.

05:58

But to do that, I'm going to start at this end

06:00

and raise that.

06:01

This is the highest at the moment.

06:03

Let me get that out of the way.

06:05

And so now, I'm going to change the height of this

06:08

from 10 foot 6 to 10 foot 8.

06:10

That's going to raise up--

06:12

I'm going to raise up my entire set of pipes two inches.

06:16

So I'm going to change this one now from 4 and 1/2 inches--

06:24

and I'm going to continue down the line.

06:27

So this one's now

06:30

This one we're going to make

06:37

And finally, I'm going to raise this one, even though it

06:40

didn't need it, but to keep it together, 10 foot 2 inches.

06:45

And now, when I come back in here and click Refresh,

06:49

you can see that cleaned up the interferences.

06:53

Now with all the interference corrected,

06:55

I can close the dialog box.

06:58

Fixing all these interferences now

07:01

while you're still in design development

07:03

will save a lot of time when it comes

07:05

to constructing the building.

Video transcript

00:01

MARTHA HOLLOWELL ORCUTT: Working with Interference Checking

00:03

in Revit.

00:05

In this video, we're going to use the Interference Checking

00:08

tool to do a quick review of ducts and pipes

00:11

that are running in tight spaces in the project

00:14

so that we can make changes at an early stage in the project.

00:18

The built-in Revit Interface Checking

00:20

complements other solutions, such as the Clash Detective

00:24

in Navisworks, which is more flexible,

00:26

and BIM 360 Coordination, which is more automatic.

00:30

The advantage of Revit Interface Check

00:33

is that it runs directly on the design model, which

00:36

means issues can be found and resolved within the same tool.

00:43

I'm working in the small medical center building.

00:46

And you can see that there are plenty of pipes and ducts

00:49

just showing in this 3D HVAC view.

00:54

I'm opening the 3D Ground Level Coordination view,

00:58

and you can see that lights are visible,

01:00

as are pipes for plumbing.

01:03

This is a 3D View shown in Top View mode,

01:06

but you can also rotate this view.

01:10

I'm also going to open the 3D Second Floor Coordination view.

01:15

Having these views open will help us discover

01:18

the location of interferences.

01:21

In the Collaborate tab on the Coordinate panel,

01:25

I'm going to expand Interference Check and select

01:29

Run Interference Check.

01:32

In the Interference Check dialog box,

01:34

I can select from the current project or the linked

01:38

architectural or structural file instead.

01:42

Then, I'm going to select the categories

01:44

that I want to review.

01:48

It's good practice to first make sure your own services are

01:52

clash free before checking it against another discipline.

01:56

Then, you're going to want to check for important clashes,

01:59

such as drainage pipes and foundations,

02:02

which are among the first things built,

02:04

and they cannot be easily resolved on site,

02:07

unlike a pressure pipe that can be routed over an obstacle.

02:12

And of course, you want to make sure there

02:13

are no clashes with the building structure,

02:16

so contractors won't drill holes through the beams.

02:20

Instead of running an Interference Check

02:23

on the full model, I'm going to cancel out of this dialog box,

02:27

and then try another way.

02:31

To limit the number of interferences,

02:33

I'm going to select elements before running Interference

02:37

Check.

02:38

So in the Second Floor Coordination view,

02:40

I selected some of the elements on the back of the building,

02:43

and then I'm running the Interference Check.

02:49

In the Interference Check dialog box,

02:51

I now need to specify which elements I want to check.

02:55

In this case, I'm going to check the ducts and duct

02:58

fittings against pipes and pipe fittings.

03:06

And let's see what happens when I click OK.

03:15

The Interference Report displays with just a few issues.

03:19

First, I'm going to select the Export button

03:22

and create an HTML file that I could share with other users,

03:28

and then I'm going to close the dialog box.

03:33

I've opened the Interference Report,

03:35

and you can see that the three interferences are listed along

03:39

with the element ID for each.

03:41

So if you pass this file along to other disciplines,

03:45

they can use the element ID number

03:47

to find the elements in the project using the Select

03:50

Elements by ID tool.

03:53

But for right now, I'm going to flip back to the project

03:56

and use other options in this case.

04:00

So I'm going to go to the Interference Check.

04:02

And I can click Show Last Report to return to my Interference

04:07

Report dialog box.

04:11

The Interference Report displays with just a few issues.

04:15

I can expand them to see what the interferences are,

04:19

but I don't really know where they are.

04:23

So I'm going to select one of the elements in the list

04:26

and click the Show button to see where they are interfering.

04:37

So I need to zoom out a little to see

04:39

where I am in the project and what the issue is.

04:43

In this case, it's a pipe running through a duct fitting.

04:48

This needs to be corrected.

04:50

I can do this with the Interference Report dialog

04:53

box still showing.

04:56

I'm going to change the Middle Elevation to 10 foot 10.

04:60

That gets me over the duct fitting.

05:02

Now in the Interference Report dialog box, I click Refresh,

05:07

and you can see that that report updates.

05:12

Let's try another one.

05:15

In the next two cases, when I click Show,

05:19

you can see that we have a duct, and then there

05:23

are pipes overlapping them.

05:28

When I select the other one, it's

05:29

the same duct but a different pipe.

05:33

I recognize that these pipes are part

05:36

of a group of parallel pipes, and I need

05:39

to be careful how I fix these.

05:43

So here are the group of parallel pipes.

05:48

Each of these are part of the system,

05:52

and then these two right here are the ones

05:55

that I need to make a modification to.

05:58

But to do that, I'm going to start at this end

06:00

and raise that.

06:01

This is the highest at the moment.

06:03

Let me get that out of the way.

06:05

And so now, I'm going to change the height of this

06:08

from 10 foot 6 to 10 foot 8.

06:10

That's going to raise up--

06:12

I'm going to raise up my entire set of pipes two inches.

06:16

So I'm going to change this one now from 4 and 1/2 inches--

06:24

and I'm going to continue down the line.

06:27

So this one's now

06:30

This one we're going to make

06:37

And finally, I'm going to raise this one, even though it

06:40

didn't need it, but to keep it together, 10 foot 2 inches.

06:45

And now, when I come back in here and click Refresh,

06:49

you can see that cleaned up the interferences.

06:53

Now with all the interference corrected,

06:55

I can close the dialog box.

06:58

Fixing all these interferences now

07:01

while you're still in design development

07:03

will save a lot of time when it comes

07:05

to constructing the building.

Interference checking - Exercise

Task 1: Run an interference check and export the report

  1. Open the practice file 001-Small Medical Center-Interference Check.rvt.
  2. In the 3D HVAC view review the pipes and ducts showing in this view.
  3. Open the Coordination > 3D Views > 3D Ground Level Coordination view. You can see that the lights are also visible as are pipes for plumbing. This is a 3D view shown in Top mode, but you can also rotate this view.
  4. Open the Coordination > 3D Views > 3D Second Floor Coordination view.
  5. In the Collaborate tab > Coordinate panel, expand Interference Check and click Run Interference Check.
  6. In the Interference Check dialog box, review the files you can chose from, as shown below, and the categories that you can test.



  7. Click Cancel because you do not want to check all potential clashes. This would take too much time.
  8. Draw a window selection box around some of the elements along the back of the building, as shown below.



  9. In the Collaborate tab > Coordinate panel, expand Interference Check and click Run Interference Check. You will see that you are just prompted to check Categories from the Current Selection.
  10. On the left side of the dialog box, select Duct Fittings and Ducts and on the right side select Pipe Fittings and Pipes, as shown below, and then click OK.



  11. In the Interference Report dialog box, review the clashes and then click Export…, as shown below.



  12. Save the html file to the exercise folder using the default name.
  13. Close the Interference Report dialog box.
  14. In Windows Explorer, open the Small Medical Center-Interference Check.html file and review it.



  15. Return to Revit.
  16. Save the project.

Task 2: Identify and correct interferences - Duct fitting and pipe

  1. In the Collaborate tab > Coordinate panel, expand Interference Check and click Show Last Report. This reopens the Interference Report.
  2. Expand the first interference and select the Duct Fitting information. Then, click Show. This zooms in on the fitting, as shown below.



  3. Zoom out and rotate around so that you can see the fitting and the pipe both in the 3D view. Select the elements to see each highlight in the view, as shown below.



  4. Move the Interference Report over if needed and select the pipe that is running through the duct fitting.
  5. In the Options Bar, change the Middle Elevation of the pipe to 10'-10". This raises the pipe above the fitting, as shown below.



  6. In the Interference Report dialog box, click Refresh. The report updates and shows that the interference is no longer present.
  7. Save the project.

Task 3: Identify and correct interferences - Ducts and parallel pipes

  1. Switch to the 3D HVAC view so you are just seeing the ducts, pipes, and other HVAC equipment.
  2. In the Interference Report dialog box, select and show the other interferences, as shown below. These pipes are part of a run of parallel pipes and therefore the entire set needs to be modified.



  3. Select the pipe to the far left, as shown below, and change the Middle Elevation of the pipe from 10'-6" to 10'8".
  4. Continue down the line of pipes, adding 2" to each elevation, as shown below.



  5. When you are finished updating the height of the pipes, in the Interference Report dialog box click Refresh.
  6. All the interferences in this selection are corrected, as you can see below.



  7. Close the dialog box.
  8. Save the project.
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