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Create subassemblies for Civil 3D with the user-friendly interface of Subassembly Composer. The Autodesk Subassembly Composer has been. When it comes to corridor modeling, Civil 3D provides a large number of subassembly parts right out of the box. Since these parts are also. One of the most common Sub-Components I get asked about is the Subassembly Composer for Civil 3D and so I am writing this helpful guide.

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Add a point component by dragging it from the toolbox and dropping it into the flowchart window. Now the subassembly is ready and it should look like Figure 8. Now you have two parametric subassemblies made from scratch. Properties is where you set the properties for each of the elements you bring in from the toolbox; properties include geometry, calculations, and overall behavior.

By doing this we are converting the grade value into a slope value. Customize it and make it yours!

For Delta Y enter 0. For this link there is no need to modify anything else. Subassembly Composer is a program where you can create subassemblies from scratch and then use them in Civil 3D just like you would with any other subassembly. In Subassembly Ciil you can also create subassemblies that work with targets. At this point the subassembly is closed, but it is empty. Repeat the previous steps for the other parameters and make sure your parameters match what is shown in Figure 2.

In the Import Subassemblies dialog, browse to where you saved your subassembly and open it.

Customizing with Subassembly Composer | AUGI – Autodesk User Group International

Add a point below the auxiliary point you just created and set its properties as shown in Figure 7. Some of them use targets to override slopes, widths, etc. Atan Slope ; this will give you the slope in radians.


Miguel can be reached at mmedina prosoftnet. Add another point element, which will be the bottom right corner of the subassembly. We want to be able to use positive and negative grade values because depending on that, you will draw something different.

Constant Length and Varying Slope Subassembly This subassembly works similar to the LinkWidthAndSlope generic subassembly, but this one keeps the length constant regardless of the slope. The codes used when creating a subassembly will work with the codes in the Code Set Styles, point codes will create feature lines, and links can be used for surface creation Figure 1: In AutoCAD we have been doing this for years by using workspaces containing specific combinations of tools, user profiles with specific configurations for system variables, and templates with pre-existing objects and styles.

Slanted curb in Subassembly Composer At this point the subassembly is ready and it should look like Figure 3. Customize It and Make It Yours When we customize a program or a graphical user interface it usually is because we want to modify the way things look and behave. You can now save the file and close Subassembly Composer.

For Output Parameter select Atan and for value, cpmposer Math. For the output parameters there is no need to type in a display name because the user will not be able to edit these values. Add another point element, which will be the top right corner of the subassembly. For display name, type Top Width. Set a default value for this parameter of 0. Set its properties the same way you did for the previous point. Those tools are great the way they are, but we can make them even better through customization and by using Autodesk Subassembly Composer.


Add this subassembly to the Custom Subassemblies palette the same way you did with the other subassembly. The direction is input because it is an input parameter, meaning that the user will input the value.

Customizing with Subassembly Composer

Notice that here you have to use both input and output parameters. This will be the origin and insertion point. Drag and drop an Subasaembly point and place it below the False label.

Packet Settings is where you create and set up the subassembly parameters, targets, and so on. This is the name that this subassembly will use in Civil 3D.

Use Subassembly Composer – Create a Civil 3D Subassembly

From the toolbox, drag and drop a Decision operator, which is in the Workflow category. From the toolbox in the Miscellaneous category, drag Set Output Parameter and drop it into the flowchart. Add a link component to the flowchart; no need for points here because the link will connect to existing points.

To understand what Subassembly Composer does, we need to review how subassemblies work, what their components are, and what they do; specifically, we need to understand codes, points, links, and shapes. This makes the way Subassembly Composer works seem a little weird, so when you design a subassembly it is always a good idea to start by drafting an outline by hand.

I hope these two exercises shed some light on how to use Subassembly Composer. Home Articles Customizing with Subassembly Composer.