AutoCAD Civil 3D assembly is a set of design objects, such as alignments, profiles, and corridors, that work together to create a complete design. A subassembly is a smaller component of an assembly, such as a curb or a gutter.
To create an assembly in Civil 3D, you can use the "Assemblies" palette to choose from a list of pre-defined assemblies or create your own custom assembly using the "New Assembly" command. To modify an assembly, you can use the "Edit Assembly" command to make changes to the alignments, profiles, and other components that make up the assembly. To copy an assembly, you can use the "Copy Assembly" command and specify the location where you want the copy to be created.
You can also create and modify subassemblies in the same way, using the "Subassemblies" palette, the "New Subassembly" command, and the "Edit Subassembly" command. To copy a subassembly, you can use the "Copy Subassembly" command
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