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MARTHA HOLLOWELL ORCUTT: Setting up an initial clash

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test in Navisworks.

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Once the models from various disciplines

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are aggregated together in a Navisworks file,

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you can start to investigate how the models interact

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with each other.

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You can just move around in the model visually,

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but it's much better to run a clash

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test to more accurately identify the issues.

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In Navisworks Manage, we're going

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to open the Navisworks file set Small Hospital Combined

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clash.nwf and click Open.

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There are three models in this.

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To see this, you can go up to the Home tab

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and select Selection Tree.

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Now you can see that we have the three models,

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and there's one for architectural, one for systems,

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and one for structural.

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We're going to start our investigation by checking

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clashes between structural beams and mechanical pipes,

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so we don't need to see the architectural model

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for this test.

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In the Selection Tree, right click

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on the architectural model, and select Hide.

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Then we can zoom in on the area where we're

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going to do our clash tests.

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In the Home tab Tools panel, click Clash Detective.

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In the Clash Detective window, in the upper right corner,

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we're going to click Add Test.

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In the Name edit box, we're going to type

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in a name that matches the clash you

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want to run, so in this case, structural beams and plumbing

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piping.

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We're going to click on the Rules tab

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so that you can see that you can ignore certain clashes,

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and in this case, we're not going to do any of these.

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But for example, if there are some items that

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are on the same layer, or other items

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you don't want them to test, then click on the Select tab.

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We're ready to set up our selection.

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As you can see on the Select tab,

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there's selection A and selection B. And each of them

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have various options.

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These are the same options that you

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have in your Selection Tree--

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Standard, Compact, and Properties.

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Your standard gives you all the options

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of the various items within each of your files,

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whereas compact just gives you the option of the file itself.

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Properties allow you to select from items, such as your room

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names and then the various properties

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included in the models, so, for example, material or location.

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On the left-hand side, we're going

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to expand our structural model, and come down and select

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structural framing.

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And then in selection B, we're going to select our systems,

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hold down the Control key, and select Pipes and Pipe Fittings.

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So those are the items we're going to check in our clash.

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You can choose to do surfaces, which is the most common one

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that you're going to be using.

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You can also choose lines and points,

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any kind of self-intersecting item,

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and instead of using the list, you

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could use a current selection, or select in the scene.

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So these are, again, how you set up your selection sets.

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In the Settings panel, you can set the type of clash--

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Hard, where two objects actually intersect,

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Hard Conservative, where two objects are very close,

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Clearance, where two objects come

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within a specific distance, for example,

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if you want to have a space around objects for insulation,

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and Duplicate, where two items are the exact same type

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and position.

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In this case, we'll run a clearance clash

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using the default tolerance.

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If you are using Timeliner in the clash,

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you can select the link.

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Now, we're ready to click Run Test.

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When the test is completed, the Results tab automatically

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opens.

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In this example, we have about 20 clashes.

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When you click on it, and move the dialog box away,

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you should be able to see the clash.

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If you have two screens, you might

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want to go ahead and move the Clash

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Detective to another screen.

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You'll notice that there's one green and one red.

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This is set up in the highlighting,

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so your item one, the structural in this case, and the item two,

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piping.

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You also can set up whether you want to dim the other objects

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or hide the other objects, so it depends on,

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do you need to see it in context?

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If you are dimming, you can choose

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whether or not to have transparent dimming.

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You can also set up the viewport.

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And if you want to focus again on the clash,

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you can quickly do that by clicking Focus on Clash.

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So now, you want to go ahead and just review

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all of your clashes, and in the next video,

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we'll take a look at how we actually group clashes.