Check for interferences

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In this video we will cover running interference checks and reviewing interferences.

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When working in Revit it's important that you coordinate with other disciplines, others on your team and even yourself.

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You can do this by running interference checks.

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Let's take a look at how this works on the collaborate ribbon in the coordinate panel, expand the interference check button,

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and select run interference check in the interference check dialog.

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There are essentially two sides.

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You can select categories of elements on the left,

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and choose to run an interference check between the categories of elements that you select on the right.

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The first thing you can do is choose categories from.

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And this can either be the current project or any linked rabbit model.

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I'll select current project on the left and then once again on the right, you can either select current project or any linked Revit model.

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I'll select current project again.

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And then on the left I'll select electrical equipment, electrical fixtures, and lighting devices and lighting fixtures.

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And then on the right I'll select air terminals, duct fittings and ducts.

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And we can run an interference check between these categories of elements.

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You can also use the buttons at the bottom to help you narrow down your selections.

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Once you are ready to run the interference, check, click OK and then Revit will run the interference check.

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When complete an interference report will appear.

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To begin you can choose how you want to group the clashes.

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Category one are the categories that you selected on the left and category two are those that you selected on the right.

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So if we select category one, we are grouping them based on the electrical categories that we selected,

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and in this case we only have clashes between lighting fixtures.

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I'll select category two. And then category one.

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That way we can have a listing for each lighting fixture.

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Now, when you select a clash grouping, there are, it will –

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first off it'll highlight in the model if it's visible in that view or you can expand that listing and then see the specific elements.

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And you can see the category of element, the type, the mark, and also the element ID.

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And once again, if it is visible in the model then it will highlight.

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For example, this one is highlighted here.

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If it's not visible you can click Show and then Revit will either zoom into it in the current view or open a view if it's not currently visible.

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Once again you can expand it, select individual components,

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and then you can also leave this interference report, dialog open and then work with components in the model.

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So for example, I'll select the lighting fixture and I can manipulate it just like I was in would normally in Revit.

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In this case I just have this dialogue open.

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So what I will do is I will select the lighting fixture and then in the contextual ribbon I'll click Selection Box,

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and then I will type CE to zoom to extents and then I can orbit around here and see the clash that we have here.

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So in this case I can see the flex duct that's coming in and going right through the lighting fixture.

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Now I will switch back to the – well first off I want to check the orientation here,

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and then switch back to the floor plan view and now typically the lighting fixture would have priority.

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But for sake of example we will move this, move it 2 feet down and then we'll switch back to the 3D view,

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and we can see that we've resolve this clash here.

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Now when you are resolving clashes, you can click refresh in the interference report,

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and Revit will rerun the interference check based on the same categories of elements that were selected.

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And now in this case we can see that one of our clashes was resolved and we can continue working.

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You can also click Close to close the interference report.

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And then if you want to see the same interference report, go back to the collaborate ribbon,

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and in the coordinate panel, expand the interference check button and select show last report.

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And then that last interference report will open again.

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For this example, I'll click close and then we'll run another interference check.

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So I'll select run interference check.

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And then this time I will select electrical equipment and electrical fixtures.

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And then on the right, I'm going to select categories from the linked architectural model and we'll select walls and then I'll click OK,

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Now I have another interference report and I can see all of the – once again, I can choose how I'm going to group it,

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so I'll change it back to category one and then I can see all the electrical fixtures that are clashing with walls.

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Now, in some cases this may be fine.

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So let me select one and click Show and sometimes it really doesn't help you much if it zooms way out.

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But in some cases we have we have electrical fixtures that are actually placed on walls,

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and so depending on how it's placed, you may get a clash in that in for that instance, and so that may be fine and you'll just ignore it.

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But as you can see, you can run interference checks between items in your model,

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and then you can also run in between items between in your model and any linked models.

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We'll run one more and this time I'm going to select electrical equipment and electrical fixtures,

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and then we'll clash it between lighting devices and lighting fixtures, and I'll click OK.

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And if there are no interferences detected, you will get a dialogue stating that with an emphatic exclamation point there,

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because that's great news when we get this dialogue.

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So run interference checks, resolve those clashes and then hopefully you can get this dialogue.