Module 10. Assemblies and Corridors. Objectives

Transcription

1 NOTES Module 10 Assemblies and Corridors In this module, you learn to work with assemblies and corridors in AutoCAD Civil 3D. Corridor models are used to represent road designs in Civil 3D. An assembly represents the typical cross section and is made from subassemblies. Civil 3D comes with a number of subassemblies that represent different components of a cross section. The corridor model forms the spine of the subdivision grading design. After subdivision corridor models are created, they are used to generate the grading elevations for the parcels in the subdivision. Objectives After completing this module, you will be able to: Create a tool palette. Copy subassemblies from the Subassembly Catalog to the tool palette. Modify subassembly parameters on the tool palette. Create an assembly from subassemblies. Create a corridor model for a subdivision road with a cul-de-sac. Create a surface for the corridor top layer. Generate point data for construction staking. Extract grading feature lines from corridors.

2 AutoCAD Civil 3D 2009 Education Curriculum NOTES Notes Data for this module resides in the \AutoCAD Civil 3D 2009 Education Curriculum\Module 10 Assemblies and Corridors\ folder. Student Exercises The following exercises are provided in step-by-step format. Open the AutoCAD Civil 3D program prior to beginning the lesson by double-clicking the Civil 3D icon on your desktop. Those working in the Imperial system should use the drawing files beginning with the letter I, while those working in the metric system should use the drawing files beginning with the letter M. You are provided with a drawing for each exercise in the lesson. You must use the drawings provided with each exercise. The exercises in this module are as follows: 1. Create a Tool Palette for Subassemblies 2. Copy Subassemblies to the Tool Palette 3. Modify Subassembly Parameters 4. Create Assemblies for Cedar Cove Corridor 5. Create a Corridor Model 6. Create a Corridor Surface 7. Generate Point Data for Construction 8. Extract Grading Feature Lines from Corridor 10-2

3 Module 10 Assemblies and Corridors NOTES Assemblies and Corridors Subdivision design elevations and grades are typically dictated by the design alignments and profiles of the roads. In effect, the roads form the spine of the subdivision horizontal and vertical design. In this module, you create a corridor model for a subdivision road with a cul-de-sac. Corridor models are the end result of an involved design process. Design horizontal alignments and vertical alignments (profiles) are required, and are provided for you in this module. Civil 3D corridor models are created by processing a Civil 3D assembly, or typical section, along the design horizontal and vertical alignments. The corridor is calculated at an interval specified by the assembly insertion frequency settings. The assembly, or typical section, is constructed from subassemblies, which are the individual parts of the assembly. A completed assembly is shown in the following illustration: AutoCAD Civil 3D provides several subassemblies that are organized in the Subassembly Catalog. These subassemblies address many possible cross section configurations. Subassemblies exist for lanes, shoulders, curbs and gutters, sidewalks, barriers, structures, pipe trenches, daylighting, and other section components. You can modify the property values for subassemblies to suit the design criteria. For example, you can change the width and pavement structure depths for the lane subassemblies. In this module, you begin by creating a custom tool palette on the Tool Palette window. The subassemblies required for this module are copied from the Subassembly Catalog to the tool palette. The next step is to modify the properties of the subassemblies on the tool palette. After that, you create an assembly for the subdivision road from the subassemblies on the tool palette. After a subassembly has been created, you can modify the property values of the subassemblies (as part of the assembly) in the drawing. This results in automatic updates to any corridor models created using those subassemblies and assemblies. 10-3

4 AutoCAD Civil 3D 2009 Education Curriculum NOTES You then create a corridor model from the assembly and the given horizontal and vertical alignments. Next, you create a top surface for the corridor model, generate points for construction staking, and finish with the creation of grading feature lines. The top surface is used to calculate manhole rim elevations and pipe inverts for storm and sanitary sewers in the subdivision. It can also be used to label design spot elevations and design grades. Grading feature lines can be used to design the grading for the parcels adjacent to the corridor models in the subdivision. Key Terms Subassembly A subassembly represents a single component of a road cross section such as a lane, curb structure, or sidewalk. Subassemblies are assembled to create the assembly. You can choose from over a hundred subassemblies in Civil 3D. Assembly Typical Cross Section Corridor Model Corridor Surface Baseline Region Frequency An assembly is created from subassemblies and represents the typical cross section configuration of the proposed road. An assembly for a subdivision road may consist of two lane subassemblies (one for each side), two gutter subassemblies, and two sidewalk subassemblies. The typical cross section is the engineering detail that shows the configuration of the proposed cross section for a road. These details include widths, depths, slopes, grades, and materials. Offset locations on a typical cross section are referenced from the road centerline. Civil 3D represents typical cross sections with an assembly. Corridor models are created from a design horizontal alignment, proposed vertical alignment, and an assembly. A corridor model can represent any linear designed feature, but is most commonly used for road design. Corridor surfaces are design surfaces that can be created directly from a corridor model. You can create surfaces for the different depths of a corridor model. Corridor surfaces are displayed in the Surfaces collection. A baseline is the controlling alignment, profile, and assembly for corridor creation. A corridor can be created using multiple baselines. For example, a corridor model for a road with a cul-de-sac consists of two baselines. One baseline is used to model the main road section and the other baseline is used to model the cul-de-sac. A corridor region is represented by a station range for a baseline. Baselines can have multiple regions. You can assign a different assembly, assembly insertion frequencies, and targets for corridor regions. The frequency is the interval at which assemblies are inserted to create the corridor model. You can assign different intervals for tangents, curves, spirals, and profiles curves. 10-4

5 Module 10 Assemblies and Corridors NOTES Targets Corridor Feature Line Grading Feature Line Some subassemblies enable you to assign targets. A target is used to control a specific property of a subassembly. For example, the width of a lane subassembly can vary by assigning a target alignment, or a catch slope subassembly could determine fill or cut conditions based on the target ground surface. Corridor feature lines are the 3D longitudinal lines that run the length of the corridor. Corridor feature lines are created from the points on the subassemblies. A grading feature line is a feature line that is used exclusively for grading purposes. A grading feature line can be created using feature line commands or can be extracted from a corridor model. Grading feature lines are typically created at the property line locations. 10-5

6 AutoCAD Civil 3D 2009 Education Curriculum NOTES EXERCISE 1: CREATE A TOOL PALETTE FOR SUBASSEMBLIES You must complete this exercise before moving on to the other exercises in this module. Tool palettes are an important part of the AutoCAD Civil 3D workspace. Tool palettes are created on the Tool Palette window and can accommodate commands, blocks, dimensions, hatches, external references, raster images, and Civil 3D subassemblies. In this exercise, you learn how to create a new tool palette to store the subassemblies required for the lesson. For this exercise, open \Module 10 Assemblies and Corridors\I_AssembliesandCorridors-EX1.dwg (M_AssembliesandCorridors- EX1.dwg). Begin by opening the Tool Palettes window. When you start Civil 3D the Tool Palette window displays. 1. If the Tool Palette window is not visible, click or enter TP on the command line and press ENTER. Note: You can also use CTRL+3 to open and close the Tool Palette window. Civil 3D displays the Imperial Tool Palette window. 2. Position the Tool Palette window undocked on the right side of the screen. 10-6

7 Module 10 Assemblies and Corridors NOTES Now customize the Tool Palettes. 3. Position the cursor away from an icon and right-click. 4. Select Customize Palettes from the menu. On the right side of the Customize dialog box, notice the Palette Groups shown with the file folder symbol. 5. Click the minus (-) sign and close all the palette groups. 6. Click the plus sign (+) to expand some of the groups. Notice the different tool palettes for the groups. 7. Right-click Annotation and Design. Click Set Current. The Tool Palette window displays the Annotation and Design palette group. 8. Click the tabs on the Tool Palettes window and notice the different tools. 10-7

8 AutoCAD Civil 3D 2009 Education Curriculum NOTES 9. Click back to the Customize window. 10. Right-click Civil 3D Imperial (Civil 3D Metric). Click Set Current. 11. Click Close. The next step is to create a new tool palette. 12. Right-click the Tool Palette window away from the icons. 13. Click New Palette. 14. Enter Module 10 Subassemblies. Press ENTER. You have created a blank tool palette to contain the subassemblies used in this Module. 15. Keep the drawing open. You will use the same drawing in the next exercise. 10-8

9 Module 10 Assemblies and Corridors NOTES EXERCISE 2: COPY SUBASSEMBLIES TO THE TOOL PALETTE You must complete this exercise before moving on to the other exercises in this module. The Subassembly Catalog contains all the subassemblies that come with AutoCAD Civil 3D. The Subassembly Catalog organizes the subassemblies into categorized sub-catalogs. In this exercise, you copy subassemblies from the Subdivision Roads Subassembly Catalog to the new tool palette. As you did not make any changes to the drawing, you can continue working with the same drawing from Exercise Click Corridors menu > Subassembly Catalog. The Catalog Library is displayed. 2. Click Corridor Modeling Catalogs Imperial (Corridor Modeling Catalogs Metric). There are several catalogs that organize subassemblies in categories. 3. Click C3D Imperial Subdivision Roads Subassembly Catalog (C3D Metric Subdivision Roads Subassembly Catalog). 4. Click Lanes. 5. For LaneOutsideSuper, click and hold the cursor over the blue i-drop symbol. 10-9

10 AutoCAD Civil 3D 2009 Education Curriculum NOTES 6. Drag the LaneOutsideSuper subassembly to the new tool palette. 7. Click Back on the Catalog window. 8. Click Urban. 9. For UrbanCurbGutterGeneral, click and hold the cursor over the blue i- drop symbol. 10. Drag the UrbanCurbGutterGeneral subassembly to the new tool palette. 11. Repeat the step and drag the UrbanSidewalk subassembly to the new tool palette. 12. Close the Catalog window. 13. On the Tool Palettes window, right-click the Module 10 Subassemblies tab. Click Move Up. 14. Repeat the step until the Module 10 Subassemblies tool palette is at the top of the Tool Palettes window. 15. Keep the drawing open. You use the same drawing in the next exercise

11 Module 10 Assemblies and Corridors NOTES EXERCISE 3: MODIFY SUBASSEMBLY PARAMETERS You must complete this exercise before moving on to the other exercises in this module. The design of subdivision roads calls for specific design parameters for pavement width and pavement structure depth. These parameters are determined by engineering decisions during the planning phase of a project. In this exercise, you modify design parameters for the subassemblies on the tool palette to meet the geometric design requirements for the subdivision. As you did not make any changes to the drawing, you can continue working with the same drawing from Exercise Click the Module 10 Subassemblies tab on the Tool Palettes window. 2. Right-click LaneOutsideSuper and click Help. Civil 3D displays the Help document for the LaneOutsideSuper subassembly. 3. Review Help to learn how the LaneOutsideSuper subassembly works. 4. Make note of the different input parameters. 5. Close the Help window. 6. Repeat the previous steps and view Help for the UrbanCurbGutterGeneral and UrbanSidewalk subassemblies. 7. Close the Help window. 8. Right-click LaneOutsideSuper. 9. Click Properties. 10. On the left side of the Tool Properties dialog box, scroll down to view Advanced Parameters

12 AutoCAD Civil 3D 2009 Education Curriculum NOTES 11. For Width, enter 16 (4.0 m). This modifies the lane width to 16 feet (4 m). 12. Click OK. 13. Right-click UrbanSidewalk. 14. Click Properties. 15. On the left side of the Tool Properties dialog box, scroll down to view Advanced Parameters. 16. For Inside Boulevard Width, enter 7 (2.4 m). 17. For Outside Boulevard Width, enter 0 (0 m). 18. Click OK to close the Tool Properties dialog box. 19. Keep the drawing open. You use the same drawing in the next exercise

13 Module 10 Assemblies and Corridors NOTES EXERCISE 4: CREATE ASSEMBLIES FOR CEDAR COVE CORRIDOR You must complete this exercise before moving on to the other exercises in this module. A typical section shows the engineering details of a cross section configuration. Typical sections are represented with assemblies in Civil 3D. In this exercise, you create two assemblies for the Cedar Cove Corridor. One is required for the tangent section and the other is required for the bulb at the end of the cul-de-sac. As you did not make changes to the drawing, you can continue working with the same drawing from Exercise 3. Start by configuring the workspace. To create assemblies you need to view the AutoCAD Object Properties window with the Tool Palettes window. 1. Click or enter PR (Object Properties). Press ENTER. Note: You can also use CTRL+1 to open the Properties window. 2. Position the Properties window undocked on the left side of the screen and toggle Auto-hide off. 3. Position the Tool Palettes window undocked on the right side of the screen and toggle Auto-hide off. The Properties window and the Tool Palettes window are both expanded. Start by creating the assembly for the tangent section of the cul-de-sac. 4. Select Corridors menu > Create Assembly. 5. For Name, enter 2 Lane Urban. Click OK. 6. Select a location in the drawing to create the Assembly

14 AutoCAD Civil 3D 2009 Education Curriculum NOTES Civil 3D inserts the assembly in the drawing and automatically zooms to the assembly. Now you add the subassemblies to this assembly. Begin with the right side. 7. On the Tool Palette, click LaneOutsideSuper. Civil 3D populates the Properties window with the LaneOutsideSuper subassembly parameters and default values. 8. In the Properties window, for Side, select Right. 9. Review the remaining parameters. 10. Select the assembly marker point to insert the subassembly. Civil 3D attaches the subassembly to the assembly marker point. You see the lane structure for the right side in the drawing. 11. On the tool palette, click UrbanCurbGutterGeneral. Civil 3D populates the Properties window with the UrbanCurbGutterGeneral subassembly parameters and default values. 12. In the Properties window, for Side, select Right. 13. Review the remaining parameters. 14. Select the subassembly marker point at the top of pavement edge location 10-14

15 Module 10 Assemblies and Corridors NOTES to insert the subassembly. If you make a mistake, you can use the AutoCAD Erase command to delete the subassembly and start again. 15. On the Tool Palette window, click UrbanSidewalk. 16. In the Properties window, for Side, select Right. 17. Review the remaining subassembly parameters and default values in the Properties window. 18. Select the subassembly marker point on the top and back of curb to insert the subassembly. The assembly appears as shown. You created the right half of the assembly. In the next steps, you create the left half. 19. On the Tool Palette, click LaneOutsideSuper. 20. In the Properties window, for Side, select Left

16 AutoCAD Civil 3D 2009 Education Curriculum NOTES 21. Select the assembly marker point to insert the subassembly. 22. On the Tool Palette, click UrbanCurbGutterGeneral. 23. In the Properties window, for Side, select Left. 24. Select the top of pavement subassembly marker on the left side to insert the UrbanCurbGutterGeneral subassembly. 25. On the Tool Palette, click UrbanSidewalk. 26. In the Properties window, for Side, select Left. 27. Select the subassembly marker on the top and back of curb to insert the UrbanSidewalk subassembly. 28. Press ESC. The assembly is finished and appears as shown. Now create the assembly for the bulb section of the cul-de-sac. When you create the corridor, you attach the cul-de-sac assembly to a second corridor baseline. This second baseline is the edge of pavement around the cul-de-sac

17 Module 10 Assemblies and Corridors NOTES 29. Select Corridors > Create Assembly. 30. Enter Half Section for Name. Click OK. 31. Select a location in the drawing below the 2 Lane Urban assembly to insert the new assembly. 32. On the Tool Palette, click UrbanCurbGutterGeneral. 33. In the Properties window, for Side, select Right. 34. Select the assembly marker point to insert the subassembly. 35. On the Tool Palette, click UrbanSidewalk. 36. In the Properties window, for Side, select Right. 37. Select the subassembly marker on the top of the back of the curb to insert the UrbanSidewalk subassembly. Now you add a lane on the left side of the assembly. This will form the center of the cul-de-sac when the assembly is processed around the pavement edge baseline in the cul-de-sac. 38. On the tool palette, click LaneOutsideSuper. 39. In the Properties window, for Side, select Left. 40. Select the assembly marker point to insert the subassembly. The Half Section assembly appears as shown

18 AutoCAD Civil 3D 2009 Education Curriculum NOTES 41. Press ESC to cancel the command. 42. Close the Properties window. 43. Close the drawing and do not save the changes

19 Module 10 Assemblies and Corridors NOTES EXERCISE 5: CREATE A CORRIDOR MODEL AutoCAD Civil 3D represents road designs with corridor models. To create a corridor you need a proposed horizontal alignment, a proposed vertical alignment (profile), and an assembly (proposed cross section). In this exercise, you create a corridor model for a subdivision road with a cul-de-sac. For this exercise, open \Module 10 Assemblies and Corridors\I_AssembliesandCorridors-EX5.dwg (M_AssembliesandCorridors-EX5.dwg). 1. Select Corridors menu > Create Corridor. You are prompted on the command line to Select a Baseline Alignment. 2. Press ENTER. 3. Select Cedar Cove and click OK. You are prompted on the command line to Select a Profile. 4. Press ENTER. 5. Select the Cedar Cove - FG profile. 6. Click OK. You are prompted on the command line to select an assembly. 7. Press ENTER

20 AutoCAD Civil 3D 2009 Education Curriculum NOTES 8. Select 2 Lane Urban and click OK. The Create Corridor dialog box displays. 9. Enter Cedar Cove for Corridor name. 10. If necessary, click twice in the line above Region (1) and change the blank name to Baseline (1). 11. Click twice in the Region (1) and change the name to Tangent. Now set the Start Station and End Station for the Tangent region. 12. Click in the Start Station column. 13. Snap to the endpoint of the edge of pavement alignment to the right of Parcel 67. The Tangent region of the corridor will start at this location

21 Module 10 Assemblies and Corridors NOTES 14. Click in the End Station column. 15. Snap to the endpoint of the 1 st arc at the northwest end of the cul-de-sac. The Tangent region of the corridor will end at this location. 16. Click in the Frequency column. 17. Change all values to 10 (5 m). The assembly will be processed every 10 (5 m) along this region to calculate the corridor. 18. Click OK in the Frequency dialog box. 19. Click OK in the Create Corridor dialog box. Civil 3D creates the corridor for the tangent region of Cedar Cove. If the Panorama window displays with Events, close the Panorama window

22 AutoCAD Civil 3D 2009 Education Curriculum NOTES The next step is to add an additional baseline to model the cul-de-sac. 20. In the drawing area, select the corridor. 21. Right-click and click Corridor Properties. 22. Click the Parameters tab. 23. Click Add Baseline. 24. In the Pick Horizontal Alignment dialog box, select the Cedar Cove EP horizontal alignment. 25. Click OK. 26. Click in the Profile column for the new baseline. 27. In the Select a Profile dialog box, select the Cedar Cove EP FG profile. 28. Click OK

23 Module 10 Assemblies and Corridors NOTES The baseline for the cul-de-sac region is the edge of pavement, not the centerline. 29. Right-click Baseline (2). Click Add Region. 30. In the Select an Assembly dialog box, select the Half Section assembly and click OK. 31. Expand Baseline (2). 32. Click twice on Region (1) below Baseline (2). Change the name to Cul-de-sac. 33. Click in the Start Station column for the Cul-de-sac region. 34. Snap to the endpoint of the 1 st arc on the cul-de-sac. 35. Click in the End Station column for the Cul-de-sac region. 36. Snap to the endpoint of the last arc on the cul-de-sac. 37. Click in the Frequency column for the Cul-de-sac region. 38. Change all values to 5 (2 m)

24 AutoCAD Civil 3D 2009 Education Curriculum NOTES 39. Click OK in the Frequency dialog box. Click OK in the Corridor Properties dialog box. The corridor is constructed into the cul-de-sac. Notice that the cul-de-sac does not extend back to the center of Cedar Cove. The lane width for the half section is too small. 40. In the drawing area, select the cul-de-sac corridor. 41. Right-click and click Corridor Properties. 42. Click in the Target column for the cul-de-sac region. The Target column is to the right of the frequency column. If necessary expand (widen) the Corridor Properties dialog box and use the slider bar on the bottom to reveal more columns. The Target Mapping dialog box displays. With target mapping you stretch the LaneOutsideSuper subassembly to the Cedar Cove centerline alignment and vertical profile. This completes the design to the center of the cul-de-sac. 43. For Width Alignment, click in the Object Name column

25 Module 10 Assemblies and Corridors NOTES 44. In the Set Width Or Offset Target dialog box: For Select Object Type to Target, select Alignments. Click Cedar Cove. Click Add. 45. Click OK. 46. For Outside Elevation Profile, click in the Object Name column. 47. In the Set Slope or Elevation Target dialog box: For Select Object Type to Target, select Profiles. For Select an Alignment, select Cedar Cove. Click Cedar Cove FG. Click Add

26 AutoCAD Civil 3D 2009 Education Curriculum NOTES 48. Click OK twice. 49. Click OK again to close the Corridor Properties dialog box. The Cedar Cove corridor with cul-de-sac is reprocessed and is now complete. 50. Close the drawing and do not save the changes

27 Module 10 Assemblies and Corridors NOTES EXERCISE 6: CREATE A CORRIDOR SURFACE After you create the corridor model, you can create corridor surfaces to model the different layers of the assembly, or the typical cross section used to create the corridor. Corridor surfaces are useful for a number of design and construction tasks. You can create surfaces to model any of the corridor layers between the top surface and the corridor subgrade. A top corridor surface is used for calculating pipe manhole rim elevations, labeling design spot elevations, labeling design slopes, and for construction. In this exercise, you create a corridor surface for the Cedar Cove corridor. For this exercise, open \Module 10 Assemblies and Corridors\I_AssembliesandCorridors-EX6.dwg (M_AssembliesandCorridors- EX6.dwg). 1. In Toolspace, click the Prospector tab. 2. Click the plus sign (+) to expand the Corridors tree. 3. Right-click Cedar Cove. Click Properties. 4. In the Corridor Properties dialog box, click the Surfaces tab. 5. Click to create a corridor surface. Civil 3D creates a corridor surface in the Name column. 6. Click the surface name and change to Cedar Cove Top. 7. Click Surface Style. 8. Change the Surface Style to Grid. Click OK

28 AutoCAD Civil 3D 2009 Education Curriculum NOTES 9. In the Add data section of the dialog box, ensure Data Type is Links and Specify Code is Top. You create the surface from the Top corridor Links. The links are displayed perpendicular to the alignment and connect the points in the assembly used to model the corridor. 10. Click to add the Top Links to the surface as surface data. 11. Click OK. Civil 3D creates a surface representing the top of the Cedar Cove corridor. Notice that the surface extends beyond the limits of the corridor near the cul-de-sac. This occurs because a boundary has not been defined for the surface. Now you add boundaries to contain the surface within the limits of the corridor

29 Module 10 Assemblies and Corridors NOTES Begin by suppressing the display of the surface. This makes it easier to draw the boundary. After the boundary is created, you display the surface again. 12. In Toolspace, click the Prospector tab. 13. Expand the Surfaces tree. 14. Right-click Cedar Cove Top. Click Surface Properties. 15. In the Surface Properties dialog box, click the Information tab. 16. Change the Surface Style to _No Display. 17. Click OK. Civil 3D suppresses the display of the Cedar Cove Top surface. 18. In the drawing area, select the Cedar Cove corridor. 19. Right-click and click Corridor Properties. 20. In the Corridor Properties dialog box, click the Boundaries tab. 21. Right-click Cedar Cove Top. Click Add Interactively. You begin a process of selecting the Sidewalk_Out corridor feature line to define the surface boundary. The outside of the sidewalk is used to contain the creation of the surface within the boundary. 22. Zoom into the northwest corner of the corridor near parcel Using the Endpoint object snap, select the top left corner of the corridor object

30 AutoCAD Civil 3D 2009 Education Curriculum NOTES 24. Move your cursor down. Civil 3D recognizes that you have selected one of the feature lines in the corridor model and displays the Select a Feature Line dialog box. 25. Select the Sidewalk_Out feature line. Click OK. Civil 3D draws an interactive red line to follow the sidewalk outside feature line. 26. Move your cursor down to the 1 st arc on the cul-de-sac. The line stops at this location. 27. Using the Endpoint object snap, select the endpoint on the outside edge of the sidewalk at the beginning of the 1 st arc. 28. Move the cursor along the outside perimeter of the cul-de-sac and continue using an Endpoint object snap to pick several points around the cul-de-sac. Notice that the red boundary line follows your picked points

31 Module 10 Assemblies and Corridors NOTES 29. Continue the process and select an endpoint near the beginning of the tangent section on the east side of the corridor model. 30. Move the cursor to the north and notice the red boundary line. 31. Zoom into the northeast corner of the corridor. 32. Using the Endpoint object snap, select the northeast corner of the corridor to complete the surface boundary

32 AutoCAD Civil 3D 2009 Education Curriculum NOTES 33. On the command line, enter C to close. Press ENTER. You have created a closed polyline boundary for the corridor top surface. 34. In Corridor Properties, set Use Type to Outside Boundary. Now change Surface Style back to Grid. 35. Click the Surfaces tab. 36. For Surface Style, select Grid. 37. Click OK. 38. Click OK to close Corridor Properties. Civil 3D rebuilds the corridor and displays the Cedar Cove top surface with boundaries

33 Module 10 Assemblies and Corridors NOTES 39. Close the drawing and do not save the changes

34 AutoCAD Civil 3D 2009 Education Curriculum NOTES EXERCISE 7: GENERATE POINT DATA FOR CONSTRUCTION In AutoCAD Civil 3D, you design in an environment representative of true world coordinates and elevations. The process involves the creation of the design model, and then the extraction of data required for construction. This data typically consist of construction sheets, quantities, and construction staking data. In this exercise, you create design points from the corridor model that can be used for construction. For this exercise, open \Module 10 Assemblies and Corridors\I_AssembliesandCorridors-EX7.dwg (M_AssembliesandCorridors-EX7.dwg). Begin by suppressing the display of the Cedar Cove corridor top surface. 1. In Toolspace, click the Prospector tab. 2. Expand the Surfaces tree. 3. Right-click Cedar Cove Top. Click Surface Properties. 4. In the Surface Properties dialog box, click the Information tab. 5. Change the Surface style to _No Display. 6. Click OK. Now you create construction points. You create points for the edge of traveled way (pavement edge) and the back of sidewalk in the corridor tangent region. 7. Select Corridors menu > Utilities > Create COGO Points from Corridor. 8. Select the Cedar Cove corridor in the drawing area. 9. Click For User Specified Range. 10. Ensure the baseline is set to Cedar Cove

35 Module 10 Assemblies and Corridors NOTES 11. For New Point Group Name, enter Cedar Construction. 12. Turn off all Point codes except ETW (Edge of Traveled Way) and Sidewalk_Out. 13. Click OK. Civil 3D creates point objects at the edge of traveled way and the back of walk. Note: Points are created at locations determined by the corridor assembly insertion frequency. You can reduce the assembly insertion frequency in corridor properties to create fewer points. 14. In Toolspace, click the Prospector tab. 15. Expand the Point Groups tree. Civil 3D has created a point group called Cedar Construction

36 AutoCAD Civil 3D 2009 Education Curriculum NOTES 16. Right-click Cedar Construction. Click Export Points. 17. Change the Format to PNEZD (comma delimited). 18. Click and browse to \AutoCAD Civil 3D 2009 Education Curriculum\Module 10 Assemblies and Corridors\. For File Name, enter Construction Staking. 19. Click Open to return to the Export Points dialog box. 20. Click OK. Civil 3D creates an external text file that contains construction staking data. This file can be uploaded to a data collector for field construction. 21. Close the drawing and do not save the changes

37 Module 10 Assemblies and Corridors NOTES EXERCISE 8: EXTRACT GRADING FEATURE LINES FROM CORRIDOR Subdivision design involves a combination of road design and site grading. The roads in the subdivision are typically designed first. The next step is to design the grading for the adjacent parcels of land. The corridor feature lines are the longitudinal lines running the length of the corridor model. Corridor feature lines are created by connecting subassembly points at the assembly insertion locations. In this exercise, you extract grading feature lines from the corridor feature lines representing the back of sidewalk. For this exercise, open \Module 10 Assemblies and Corridors\ I_AssembliesandCorridors-EX8.dwg (M_AssembliesandCorridors- EX8.dwg). 1. Select Corridors menu > Utilities > Create Grading Feature Line from Corridor. 2. Select the outer sidewalk feature line on the west side of the corridor tangent region. 3. In the Create Feature Line from Corridor dialog box: For Site, select Grading. Select Name. For Name, enter Cedar Cove ROW. Review the remaining settings

38 AutoCAD Civil 3D 2009 Education Curriculum NOTES Note that there is a dynamic link between the feature line and the corridor. This means that if the corridor updates, the feature line at rightof-way location automatically updates. 4. Click OK. 5. Select the outer sidewalk feature line on the cul-de-sac corridor region

39 Module 10 Assemblies and Corridors NOTES 6. Again, select the Grading site, and select Name. For Name, enter Cedar Cove ROW. Click OK. 7. Select the outer sidewalk feature line on the east side of the corridor tangent region. 8. Again, select the Grading site and select Name. For Name, enter Cedar Cove ROW. Click OK. 9. Press ENTER to finish the command. Civil 3D has created three feature lines that can be used for grading. Now change the style assigned to the feature lines. 10. In Toolspace, click the Prospector tab. 11. Expand the Sites and Grading trees. 12. Right-click Grading. Click Refresh. 13. Click Feature Lines. Civil 3D shows three feature lines in the Item View area of the Toolspace window

40 AutoCAD Civil 3D 2009 Education Curriculum NOTES 14. In the Item View area, select the first feature line. 15. Holding the Shift key, select the last feature line. All three feature lines are selected. 16. Right-click the Style column header. Click Edit. 17. In the Select Style dialog box, select Grading. 18. Click OK. The display of the feature lines in the drawing updates to reflect the Grading feature line style. 19. Close the drawing and do not save the changes

41 Module 10 Assemblies and Corridors NOTES Questions Answers 1. What is a typical section? What types of information does a typical section convey? 2. What is a subassembly? Offer some examples. 3. What happens if the default design parameters for the Civil 3D subassemblies do not satisfy the requirements of the typical section? 4. Detail the process for creating an assembly. 5. What are a baseline and a region? 6. Explain the significance of targets. 7. Why would an engineer create a top surface for a corridor model? 8. Why would an engineer create points from a corridor model? What should be done with these points after they have been created in the drawing? 9. What is a corridor feature line and how is it generated? 10. Why would an engineer create grading feature lines from a corridor feature line? 1. A typical section represents the design parameters for the cross section of a road. A typical section specifies the parts that make up the road cross section. The information a typical section conveys includes section component widths, grades, slopes, pavement structure depths, and materials. 2. The subassembly represents a component of a typical cross section. Examples of subassemblies include lanes, shoulders, curbs, sidewalks, and barriers. 3. Subassemblies have parameters with values that can be edited. For example, you can modify the width, slope, and pavement structure depths for lane subassemblies. 4. You first need to locate the subassemblies on a tool palette. You can use the default tool palettes that come with Civil 3D. You can also create your own and copy the subassemblies from the Subassembly Catalog to the new tool palette. The next step is to modify the parameter values on the tool palette. Finally, you create an assembly in the drawing and add subassemblies from the tool palette

42 AutoCAD Civil 3D 2009 Education Curriculum NOTES 5. A baseline is the alignment which controls the creation of the corridor model. Each baseline has an assigned profile. You can use multiple baselines to create a corridor model. A subdivision road with a cul-de-sac uses a baseline for the main section and another baseline for the cul-desac. Within each baseline you have multiple regions, which are represented by independent station ranges. You can assign a different assembly, frequency, and target mapping within each region. 6. Some subassemblies allow for target mapping. This means that the subassembly can interact with another Civil 3D object. For example, you can control the width of the lane subassemblies by assigning a target alignment to control the width. This is how you achieve lane width transitions using the same assembly. 7. A top surface for a corridor model can be used to calculate manhole rim and invert elevations for pipe runs. It can also be used to label design spot elevations and grades. 8. Points created from a corridor model can be used for construction staking. Once the points have been created, the points are exported to an external text file so they can be uploaded to a data collector for staking. 9. A corridor feature line is a longitudinal line that runs along the length of the corridor. The corridor feature line is generated from the points that make up the subassemblies on the assembly. 10. A grading feature line can be used with the Civil 3D grading commands to design the grading for the adjacent parcels in the subdivision

43 Module 10 Assemblies and Corridors NOTES Module Summary In this module you learned how to create assemblies and corridors. In the first exercise, you created your own tool palette on the Tool Palette window to store the subassemblies required for the exercises. The next step was to modify the parameter values of the subassemblies on the tool palette to meet the design requirements of the subdivision. You then created two assemblies. One assembly was used to model the main part of the road. The other assembly was used to model the cul-de-sac. You then created the corridor model from the two assemblies. The corridor model consisted of two baselines. The first baseline was the centerline and was used for the tangent section of the road. The second baseline was the edge of pavement in the cul-de-sac and was used to model the cul-de-sac. After the corridor model was created, you then created a corridor top surface, points for construction staking, and grading feature lines. The latter were used to grade the parcels in the subdivision