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Revit Training In Tamil - CD's Available

சில நண்பர்களின் வேண்டுகோளுக்கிணங்க ஆட்டோடெஸ்க் ரேவிட் (Autodesk Revit In Tamil) தமிழில் கிடைக்கும் வகையில் தயார் செய்யப்பட்டுள்ளது. தேவைப்படும் நண்பர்கள் தொடர்புகொள்ளவும்.

Creating simple parametric families in Revit

Today, I will be showing you how to create simple parametric families in Revit. This tutorial is for anyone learning Revit who hasn’t yet got into creating families. I will be continuing to post more family tutorials so keep checking back over the coming weeks for more. This tutorial will show you how to create a simple ‘cube family’ with a fixed elevation height with parametric width and height as well as material options. 

The first thing you want to do, is to create a new generic family template. When deciding what template to use, you should take into consideration what kind of family you are creating. For example, if you are creating a light fixture, you would of course use the light fixture family template. Be sure to think about where the family will be hosted, if it will be hosted on the ceiling, make sure you also use a ceiling based family. 

Once you have your generic family template loaded, you will want to tile the windows. (Be sure you have no other active projects open) The reason you want to do this is to give you a good overview of all relevant views when creating your family. Plan view, Elevation front, Elevation left (or right) and 3D view. 

Now you should see 4 equally sized windows fitted to your screen. In case the view has been obscured, zoom to fit in each window (double click mouse wheel). Now the most important part about creating families is using reference planes. Reference planes are crucial when designing families, as these will act as your control dimensions / constraints. Create a square with 4 seperate reference planes as shown in the image below. Always remember to draw your reference planes clockwise, this will be important for future developments. 

Now you have set constraints to the floor plan view of the project, it is now time to set some elevation height constraints. We do this with the use of dimensions (di), by adding a dimension line to our elevation view. If you have a certain height you want your cube to be, then measure it off here, otherwise, for now just follow the example shown in the images below. 

Once we have set some dimensions on our reference planes, we want to give these dimensions a parameter. Parameters are used to give custom or fixed assets to our families. Now you want your elevation view, where you have just created a dimension to be active. Highlight your dimension and click on the dropdown menu next to label, as shown below. To start with, the only option you will see is ‘Add parameter…’

We are now going to add a parameter to this dimension line, constraining the elevation height of the cube. As shown in the image below, we will create a name for this dimension parameter ‘Height of cube’. Be sure the ‘Group parameter under’ option is set to ‘Dimensions’ In this case, we will keep it as a ‘Type’ parameter. This means that we can use this parameter to constrain the height of the family to the ‘Height of cube’ parameter, which you can see is ‘2214mm’.

Once you have created a parameter for your ‘Elevation left’ view, you will want to do the same thing for your dimension lines you created on the ‘Floor plan’ view. Click on the dimension defining the height and add a new parameter label. This time we will call the dimension ‘Height’ again checking it is set as a dimension. This time we will use an ‘Instance parameter’ so click the ‘Instance’ checkbox. Instance parameters will give the user of the family the option to define custom settings, in this case height for the cube. Follow the exact same steps mentioned above for your ‘Width’ dimension on the ‘Floor plan’ view. You will now have 3 dimension, with 3 new dimension labels.

Now, once our template is set up and constrained we are going to start creating some actual physical geometry. We do this of course with the Revit massing tools. As shown above, navigate to the ‘Design’ tab and click on ‘Solid Extrusion’. You now want to draw a box with the square line creation tool, covering the reference planes you have set, as shown in the image above. Before you finish your extrusion, you want to edit some of the extrusion properties.

We are now going to modify the ‘Extrusion End’ constraints, otherwise known as the elevation height, or extrusion height. Click on the small grey box at the end of the ‘Extrusion End’ bar. You will now see the ‘Associate Family Parameter’ dialogue appear. You will also see the 3 new paramaters you have just created. As we are now trying to define the extrusion height of the cube, we will select our ‘Height of cube’ parameter. Click OK. You will now see that the ‘Extrusion End’ bar is greyed out.

The final parameter we are going to add is to be for a material. The reason we do this, is so that the user of the family, in a project environment will be able to choose which material they want the family to be. For more detailed families it is possible to split the materials into different sections, but I will be discussing that in another post. For now, we want to add a parameter for the material. Simply click on the small box at the right side of the materials bar and click on ‘Add parameter…’ We will name this parameter ‘Cube Material’ and make sure it is set as a ‘Material and finishes’ parameter and set as an ‘Instance’.

You can now finish your extrusion by clicking on the green tick in the modify extrusion ribbon. You should now be seeing something similar to the image above. If not, make sure all of your views are active and zoomed to fit. You can now save this family. Revit > Save As > Family – I like to add all my custom families to a new folder I have created in the Autodesk library, that way they are all stored together, but you can choose to save it wherever suits you best.

Once you have saved your family, Use the Revit > Close button. You can now open up a new architectural project file template, or the project where you want to add your newly created family. You can now add your family the way you always would > Place component, locate your family and load it. You will now see your cube in a project view. Here you will be able to set some custom parameters, such as material, width and height. And that is it! Extremely simple, and good foundation knowledge for creating Revit families. I will be posting part 2 in my Revit familys series soon. Hope this has helped someone who is having trouble, or someone who is just starting to use Revit. Any problems or questions, just leave a comment!

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Creates new 3D views to isolate and highlight the elements in the model that have warnings to assist in debugging the Autodesk® Revit® model. 



















https://apps.exchange.autodesk.com/RVT/en/Detail/Index?id=appstore.exchange.autodesk.com%3aisolatewarnings_windows32and64%3aen

Why can’t I select my curtain walls in Revit?

Why can’t I select my curtain walls in Revit?

Have you ever come across a situation where you can see the curtain wall elements in your Revit scene, but could not select them?  To make this a little more confusing, you could select the components of the curtain wall, but not the wall itself?  We have, especially when constructing the building envelope in files that were originally generated by someone else.  Fortunately, this is an easy fix.

Let’s take a look at the situation.

Zooming into a curtainwall, you place your cursor near the perimeter and expect the curtain wall to highlight as it usually does.

This time, the head mullion highlights, but not the overall curtain wall element. Pressing the Tab key cycles the selection through the nearby curtain wall components, but not the host object.       

Trying to select the curtain wall with a selection window and filtering out everything except the wall itself seems like a solution but, as shown below, Walls are not shown as selected objects in the Filter dialog box along with the other objects.

What’s the problem?  It’s not the wall itself, but the Discipline setting of the current view.  With nothing selected, look at the Properties panel.  In the Graphics area, if the Discipline value is set to Structural, the curtain walls cannot be selected.  There are two solutions:  The first, and preferable, is to change the Discipline parameter of the view to Architectural or any option other than Structural.

The second, and not recommended, option is to select the curtain wall then, in the Structural area of the Properties panel, check the Structural option.  Curtain walls, by definition, are not load bearing and this solution may have ramifications regarding the structural design of the building.

We hope this information has been interesting and helpful.  If you have any questions regarding BIM and curtain walls, don't hesitate to ask.

Adding Mullion Profile Parameters

Adding Mullion Profile Parameters

In the recent post "Custom Profiles" (http://curtainwallbim.blogspot.com/2013/02/custom-profiles.html), ghaeberle mentioned parametric curtainwall profiles and we'll take this opportunity to present the procedure for doing just that.

When creating the profiles for curtain wall mullions on a large project, you'll notice the number of mullions growing quickly.  The captured mullion that you thought could be used in most places may need to be modified because of changes in the glass thickness, changes in the infill material (glass, terra cotta, aluminum composite panel (ACP), etc.), allowance for design features, or a change in the system, just to name a few.  By adding parameters to the mullion profile family, changes can be made quickly and the new variation can be added to the project.  Here's how:

1)  Open a mullion profile family (.rfa).  The one shown in the fig below is from the Custom Profiles tutorial on this site.

2)  In the Properties panel of the Home tab, click the Family Types button.

3)  This opens the Family Types dialog box.  Each parameter must be named and then a dimension can be associated with each parameter.  Click the Add button in the Parameters section of the Family Types dialog box.

4)  In the Parameter Properties dialog box that opens, choose Type as the parameter type then enter a descriptive name in the Name field.  Spaces are acceptable as parameter names, as are underscores and hyphens, but we don't recommend them. Underscores between words can offer a degree of visual continuity that a space doesn't and hyphens can be interpreted as minus (-) signs in some schedules.  Make sure Length is selected as the Type of Parameter then click OK.

5)  The parameter is added to the Dimensions category in the Family Types dialog box.  Repeat step #4 until you've added all the parameters that you need.  If you realize later that you missed one, you can repeat steps 2 - 4 to add it.

6)  Add dimensions to your profile that correspond to the parameters you created. These are not visible in the project that the profile is loaded into, so you don't need to spend much time making them neat.  You can also change the scale of the current view to reduce the size of the dimension.

7)  Select a dimension then, from the Options bar, click the Label drop-down list and select the corresponding parameter.

8)  The parameter name is added to the dimension name indicating that the dimension value is driven by the parameter value.  Repeat step #7 to associate the remaining dimensions to the parameters.  In the image below, you'll see that the overall system depth does not have an associated parameter.  This value is driven by the sum of the System_Depth_FOG and Cap_Depth parameter values.  This dimension cannot be locked as this would create a conflict should the other two dimensiond be modified.

 

9)  In this example, the Mullion_Width and Cap_Width parameters should move the lines equally in opposite direction.  To force this, add and place a multi-segment dimension from the left vertical mullion line to the reference line to the right vertical mullion line.  Click the Toggle Dimension Equality icon (The EQ above the dimension). EQ replaces the actual dimension to indicate that the vertical mullion lines will remain equidistant from the reference line.  Do this for the width of the cap as well.

10)  Save the file then click the Family Types button to open the Family Types dialog box.  The parameters are shown with their associated values.  To modify a parameter, change the dimension in the Value column then click Apply to see the result in the view.

From here, you'll just need to save the file after the necessary parameter changes then load the family into the project.  Remember, like any other family in Revit, it will overwrite all instances of the same name in the project.  If this is to be an additional profile in the project, perform a Save As and give the profile a unique family name before loading it into the project.  See the Custom Profiles post to see how to assign profiles to mullion types.