1-58503-278-6 -- autodesk civil 3d 2006 essentials · a civil 3d assembly anchors the subassembly...

Autodesk Civil 3D 2006

ESSENTIALS

SDC

Schroff Development Corporation

www.schroff.com www.schroff-europe.com

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4 - 1

Module 4:

Assemblies, Corridors, and Sections

This module contains:

� Section 1: Assemblies

Creating an Assembly Attaching Subassemblies Adjusting Subassembly Parameters

� Section 2: Corridors

Creating a Simple Corridor Corridor Properties Creating Corridor Surfaces Exporting Objects

� Section 3: Sections

Sample Line Groups Creating Section Views Quantity Takeoffs


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Autodesk Civil 3D 2006 Essentials

4 - 2 © 2005. Do not duplicate.

Section 1: Assemblies

In this section you will learn how to:

� Create an assembly

� Attach subassemblies

� Modify subassembly parameters


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© 2005. Do not duplicate. 4 - 3

Assembly Overview

Assemblies

An assembly defines the attachment of a roadway cross section to the horizontal and vertical alignments at the markers at its midpoint. This same point is where the subassemblies attach to the assembly.

A Civil 3D Assembly anchors the subassembly attachments

An assembly can be placed anywhere in the drawing. Generally, it should be near the profile, but its location in the drawing is irrelevant. When building a simple assembly, you build from the middle out to the edges of the section. The assembly is the centerline of the section.

� An assembly style affects only the color, layers, and symbols the assembly.

Subassemblies

A subassembly represents a portion of a roadway cross section. Examples of subassemblies are pavement, sidewalk, curb, etc. By attaching subassemblies, a user creates a roadway section that represents the desired roadway cross section. Civil 3D uses this section along with the alignment and profile to create a corridor.

Each subassembly has points, links, and a shape.

� A point is a location on a subassembly that can be used for annotation or connection to the assembly or another subassembly, e.g. edge-of-travelway, back-of-curb, gutter, etc. Civil 3D refers to these as code

points. There are styles that define the properties of these code points and labels for them.


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� A link is a line that represents a potential surface, e.g. pavement, sidewalk, datum, etc. A link can be data for a label for a slope or grade on a subassembly.

� A shape is the entire subassembly, e.g. curb, sidewalk, barrier, etc. There are styles that define the properties of each link and shape and labels for these points.

Assembly with Basic Lane and Basic Curb Subassembly

attached to the right side.

� Each subassembly attaches to the assembly connection point or a point on an adjacent subassembly.

� Each subassembly should have a unique name.

� Civil 3D Help has extensive documentation on each subassembly.

Civil 3D lists each subassembly attached to an assembly in Prospector. Prospector differentiates the subassemblies by assigning them a number, e.g. BasicLane - (1), BasicLane - (2), etc. It is best to give each subassembly a more meaningful name, e.g. Right Basic Lane, Left Basic Lane, etc.

Subassemblies used in the HWLongfellow – (1) Assembly


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Adding Subassemblies

Civil 3D ships with several subassemblies that address most roadway design needs. All are available through the Tool Palettes window. The Tool Palettes contain five subassembly categories: Basic, Roadway, Structures, Daylight, and Generic.

� To toggle the palettes window on or off, click the Tool Palettes button in the Standard toolbar, or press Ctrl + 3.


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Subassembly Parameters

Each subassembly has parameters that affect the shape of the subassembly, set grades or slopes, and control which side of the assembly it is on. The more complex a subassembly, the more parameters it has.

� When you click on a tool in the palette to add a subassembly, the Properties palette opens so that you can set the parameters.

� The parameters are found in the Advanced section on the Design tab in Properties.

� The parameters of existing subassemblies can be changed through the shortcut menu on the subassembly name in Prospector.

� When working with Tool Palettes and the Properties palette, you may find it helpful to turn off the Allow Docking option to prevent them from docking on the sides of the screen. Right-click on the palette title bar to set this option.


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Exercise: Creating an Assembly

Exercise Setup

1. Open the drawing C3D-Module 4.

2. Select File > Save As save the drawing as M4 Exercise. We will work in this copy to keep the original file intact.

3. Click on the Settings tab of Prospector to make it the current panel.

4. Click on the name of the drawing, right-click, and select Edit

Drawing Settings… from the shortcut menu.

5. Click on the Object Layers tab to view its contents.

6. Change the modifier for Assembly to suffix, add the value of -* (a dash followed by an asterisk), and click on the OK button to exit the dialog box.

Task 1: Create an Assembly

1. Use the View > Named Views… command to restore the view Assembly. This is a blank section of the screen for building the assembly.


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2. Select Corridors > Create Assembly… from the pull-down menu.

3. In the Create Assembly dialog box enter HWLongfellow as the name of the assembly, set the Assembly style to Basic, and the Code set style to All Codes.

4. Click on the OK button and select a point in the middle of the screen for the assembly baseline location.

5. If necessary use the AutoCAD Zoom command to better see the assembly.

6. Save the drawing.

Task 2: Add Subassemblies

1. Open the Tool Palettes window if it is not already showing.

2. Click on the Imperial Basic tab to show its contents.


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3. Click on BasicLane tool. The Properties window opens.

4. Find the Side parameter in Properties. Change it to right if it is not already set to that.

5. In the drawing select the assembly to place the part.

6. In the properties of the BasicLane change the Side parameter to left for the next part.

7. In the drawing select the assembly mast to place another basic lane subassembly.

8. Press the ESC key to end the basic lane attachment.

9. Select BasicCurbAndGutter in the Tool Palettes.

10. Check the Side parameter for the subassembly, zoom to better view the outer edge of the pavement on that side, and select the upper outside ring to attach the curb to the pavement.


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11. Change the Side parameter to the opposite side, zoom and/or pan to better view the outer edge of the pavement on that side, and select the upper outside ring to attach the curb to the pavement.

12. Press the ESC key to return to the command prompt.

13. In the Tool Palettes, click on the BackSideSlopeCutDitch tool.

14. Check the Side parameter for the subassembly and if necessary change it to the side you are currently looking at.

15. Select the upper outside ring of the Back-of-Curb to attach the shoulder to the curb.

16. Change the Side parameter to the opposite side, zoom and/or pan to better view that side, and select the upper outside ring to attach the shoulder to the curb.

17. Press the ESC key to return to the command prompt.


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Task 3: Change Subassembly Properties

1. Click on the Prospector tab to make it the current tab.

2. Expand the Subassembly branch to view the list of subassemblies.

3. Click on the lowest numbered BasicLane in the subassembly list, right-click, and select Properties… from the shortcut menu.

4. Click on the Parameters tab to view its contents.

5. Jot down the side the subassembly represents and change the depth to 0.75.

6. Click on the Information tab, change the name of the subassembly to Right or Left Side Basic Lane, and click on the OK button to exit the dialog box.

7. Repeat the previous three steps to change the name and depth of the opposite side Basic Lane.

8. Select and change the names of the remaining subassemblies.



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Section 2: Corridors


� Create a simple corridor

� Set corridor properties

� Create corridor surfaces

� Review and edit a corridor


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Creating a Corridor

A corridor is a roadway design model representing the path of an alignment, the vertical design of a profile, and the cross section of an assembly. By combining these three elements Civil 3D develops a model of the roadway design.

Two different commands are available for creating a corridor in the Corridor pull-down menu Create Simple Corridor or Create Corridor. Each command displays a Create Corridor dialog box and sets the name, description, and the layer for the corridor.

� There is no difference in the basic functions of the two commands. The difference is the extended capabilities of Create Corridor.

� For small and uncomplicated subdivisions and roads, Create Simple Corridor is ideal.

� For complicated design with several centerlines and controlling baselines, Create Corridor is the proper choice.

Once you have filled out the information in the Create Simple Corridor dialog, the rest of the process is identifying the names of the horizontal and vertical alignments, and the assembly. You can select each item from the screen or press the right mouse button at the prompt to display a list you can select from.

The Logical Name Mapping dialog box for Simple Corridors asks the user to identify the daylight surface. This step is necessary for the creation of a corridor surface, calculating the daylight line, and calculating volumes.


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In the figure below, the Create Simple Corridor command is prompting you for a surface for calculating daylight points along the path of the alignment. The Daylight subassemblies require the corridor to specify a surface. If a surface is not assigned in the Logical Name Mapping dialog box, Civil 3D will issue an error for each section in the Event Viewer.

� A simple corridor assumes a single region for the entire length of the alignment.

� You can break a corridor into regions and assign different sections to each region.


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Exercise: Creating a Corridor

Exercise Setup

1. Continue working in the drawing from the previous exercise.

2. Click on the Settings tab of Prospector, right-click, and select Edit

Drawing Settings… from the shortcut menu.

3. Click on the Object Layers tab and set the modifier to Suffix and the value to -* (dash asterisk) for Corridor and Corridor Section objects.

4. Click on the OK button to exit the dialog box.

Task 1: Create a Simple Corridor

1. Select Corridors > Create Simple Corridor from the pull-down menu.

2. Enter the name of HWLongfellow for the corridor, enter the description of Preliminary of 12/20/05 - Design follows terrain, and click on the OK button to exit the dialog box.


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3. At the prompt to “Select baseline alignment,” press Enter to see a list, and select HWLongfellow.

4. At the prompt to “Select a profile,” press Enter to see a list, and select HWLongfellow.

5. At the prompt to “Select an assembly,” press Enter to see a list, and select HWLongfellow.

6. In the Logical Name Mapping dialog box, click in the Object Name cell for Surfaces, select the Aerial Contours surface, and click on the OK button. This sets the surface for the daylight subassemblies.


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7. Click on the OK button to create the corridor.

8. Zoom Extents to see the corridor in the drawing.



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Corridor Properties

The Corridor Properties dialog box reports the corridor’s parameters; its point, link, and shape codes; its feature lines; and if there are any corridor surfaces, surface boundaries, and slope patterns associated with the corridor.

Parameters

The Parameters tab displays the target DTM, the beginning and ending region stations, the frequency of sections, and the name of the assembly. A corridor can have more than one region and each region can have a different assembly.

Codes

The code style assigned to the corridor determines what items list in this panel. The panel identifies which codes are available for section labels and quantity take off.


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Feature Lines

Feature lines are the named strings passing through the codes of the corridor. A user can export a polyline or feature line from any feature line listed in the panel.

Surfaces

Each link of an assembly can be data for a surface. Typically, the top and datum links create the two most common corridor surfaces. The top surface shows the final design and the datum surface is the second surface for calculating earthworks volumes.

� Corridor surfaces do not appear in the Prospector surface list.

� The Volumes command (Surfaces > Utilities > Volumes) calculates a ‘rough’ earthworks volume.

� Quantity take offs for earthwork volumes use corridor surfaces.


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Boundaries

Typically the best boundary for surface building is the DayLight boundary. This boundary is the outer most boundary of the corridor. When used as a surface boundary, it controls spurious triangles along the boundary of the surface.

� Using non-continuous feature lines as boundaries produces unpredictable surface results.

Slope Patterns

Slope patterns indicate if a slope is a cut or fill slope. These patterns are best when the boundary is a continuous corridor boundary.

� Using non-continuous feature lines as a slope boundary produces unpredictable results.


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Exercise: Corridor Properties

Task 1: Review Corridor Properties


2. Click on the corridor, right-click, and select Corridor Properties…

from the shortcut menu.

3. Click on the Parameters tab to view its contents.

4. Click on Set All Logical Names to view the current surface assignments for the corridor.

5. Click on the Cancel button to exit the Logical Names dialog box.

6. Click on the Codes tab and view the various point, link, and shape codes.

Task 2: Create a Corridor Surface

1. While still in the Corridor Properties dialog box, click on the Surfaces tab to view its contents.

2. Click on the Create a Corridor Surface button to create a surface entry (far left icon).

3. Click into the Name cell and change it to HWLongfellow – (1) Top.

4. Change the Data type to Links and Specify code to Top, and click on the blue plus sign to assign the Top link’s data to the HWLongfellow – (1) Top surface.

5. Click in the cell listing the Render Material Style and change the material style to Grass-Short.


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6. Click on the Boundaries tab to view its contents.

7. Right-click on the name of the surface and select Add Automatically

> Daylight from the menu.

8. Click on the OK button to exit the dialog box and to build the corridor surface.

9. If the Event vista appears, click on the green check mark to dismiss it.

10. Zoom and pan to better view the corridor contours.

11. Click on the HWLongfellow corridor entry in the Corridor branch of Prospector, right-click, and click on Rebuild – Automatic.


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13. Click anywhere on the corridor, right-click, and select Object

Viewer… from the shortcut menu. Use the viewer to examine the corridor from various angles with rendering turned on.

14. Close the Object Viewer.


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Corridor Review and Edit

Civil 3D reviews and edits corridor sections within a single command, View/Edit Corridor Section. The sections represent the assembly and the daylight solution for a selected point along a corridor’s path.

This command allows a user to review and edit the parameters of each subassembly of an assembly. The changes can be applied to the current station or a range of stations.

After you start the command and select a corridor, the screen displays a section at the current station, and the View/Edit Corridor Section toolbar opens.

� The arrow icon at the right end of the toolbar hides or displays the parameter list and values.

� Civil 3D shows changes to the section in various contrasting colors.


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Tool Tips

All Civil 3D objects display some of their information as a cursor tool tip. A corridor will display several tool tips about the station and offset of all alignments in the drawing, feature lines under the current cursor location, all surface elevations, and other tool tip reports.

The display of tool tips is part of an object’s properties (in the Information tab). By toggling on and off tool tips, a user can control what information displays at the cursor when hovering over a point in the drawing. This can be helpful to see the type of information you need for review and edit.


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Exercise: View/Edit Corridor Sections

Task 1: Review Corridor Cross Sections


2. Select Corridors > View/Edit Corridor Section from the pull-down menu.

3. When prompted to select an alignment, right-click, and select HWLongfellow (1) from the alignment list.

4. In the View/Edit Corridor Section toolbar, click on the Next station arrow to the right of the station number to advance to the next station.

5. Click on the drop-list arrow to view all of the cross sections for the corridor.

6. Select station 4+75 from the list to view the section.

7. Click on the arrow at the right end of the toolbar to display the panel and review their values.

8. Select station 1+75 from the list to view the section.

9. Change the Bottom Width for the right side from 2’ to 4’ in the Value column. Notice the check that appears in the Override column.


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10. Click on the Override check mark to toggle off this change for the section.

11. Close the View/Edit Corridor dialog box.


Task 2: Turn Off Tool Tips

1. If necessary click on the Prospector tab to make it the current panel.

2. Expand the Site branch to see the Alignments list.

3. Click on Back Pass Way, right-click, and select Properties… from the shortcut menu.

4. Click on the Information tab, toggle off Show tool tips, and click on the OK button to exit the dialog box.

5. Expand the Surfaces branch to see the surface names.

6. For each surface name, select the surface name, right-click, select Properties…, and toggle off Show tool tips.

7. Place the cursor over the corridor and review the remaining tool tip reports.



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Section 3: Sections


� Create a sample line group

� Create section views

� Develop quantity takeoffs


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Sample Line Groups

Sample line groups are objects that sample elements of a corridor for cross section data. The surfaces, profiles, and assembly of the corridor are the basis for the sections that document the corridor. These same elements allow you to create an estimate of the volumes of earthworks and materials needed to build the job.

Adding new data to existing sample line groups is a convoluted process. If you are creating a piping network within the area of a corridor, create the network before creating the sample line group. If you must add a pipe network after creating a sample line group, it is better to delete the sample line group and recreate it with the pipe network in place.

The Create Sample Line Group dialog box identifies all of the elements in a corridor’s path. The dialog box indicates the type of object, where it comes from, whether to sample or not, what style to use in the sections, what layers, and the update mode for the section.

� Styles for a surface assign its layer and color.

� Styles for an assembly assign its layer properties and labels.

� You can resample the corridor to include those items not toggled on.

� Double-clicking on the layer name displays a layer definition dialog box.


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After you have filled out the Create Sample Line dialog box, the Sample Line toolbar opens.

The toolbar is the control center for defining sample line locations. The default method is By stations, which means selecting a station location graphically from the screen. The Pick points on screen method allows you to identify any point in the drawing and Civil 3D will find the station and offset of that point relative to the current alignment. The By station range method prompts for a range of stations, sampling width, what geometry points to sample, and other critical sample locations.

The last method, From corridor stations, uses the stations of the corridor as the stations of the sample line. This method also displays the Create Sample Line dialog box to define the station range and swath widths for the sections.

� An alignment based on the Daylight Feature line can automatically set the width for the sample line.


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After creating the sample line group, Civil 3D lists all of the sample lines under the Alignments entry in Prospector. The list includes all of the elements that can be in a part of a sample line group. Each branch of a Sample Lines lists the sampled elements and their values for the sample line.


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Exercise: Create Sample Line Group

Task 1: Create a Sample Line Group

1. Continue working in the drawing from the previous exercise (or, if you did not complete the exercises in the previous section, open the drawing Module 4–Sec 3).

2. Select Sections > Create Sample Lines… from the pull-down menu.

3. Select the HWLongfellow - (1) corridor. The Create Sample Line Group dialog box displays.

4. In the dialog, toggle OFF the Existing and Aerial Contours surfaces

5. Change the Style for Composite to Existing Ground and change the Style for HWLongfellow Top to Finished Grade.

6. For each of the four selected items, double-click in the Section Layer column and add a suffix to the layers as follows:

Data Source: Section Layer: Aerial Contours C-ROAD-SCTN-EXGRND HWLongfellow – (1) C-TOPO-SCTN-ASSM HWLongfellow – (1) Top C-TOPO-SCTN-DATUM HWLongfellow – (1) Datum C-TOPO-SCTN-TOP


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7. Click on the OK button to exit the dialog box and to display the Sample Line toolbar.

8. Click on the Sample Line method drop-down and change the method to From Corridor Stations.

9. In the Create Sample Lines dialog box change the Left and Right swath width Snap to an alignment to True.

10. Click in the Alignment name cell, select the Daylight Left for the left swath width and the Daylight Right for the right swath width.


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11. Click the OK button to accept the current values to create the Sample Line Group.

12. After creating the sample lines, the routine returns to the By Stations mode for creating any new sample lines. Select four additional sample line locations using the station location jig and make the swath width 40’ for both right and left swath widths.

13. Press the Enter key to finish selecting the sample lines and to sample the corridor.


Task 2: Review Sample Line Properties

1. If necessary, click on the Prospector tab to make it the current tab.

2. Expand the Site branch to see the HWLongfellow Alignment branch and expand it until viewing the SLG-1 tree.

3. Click on SLG-1, right-click, and select Properties… from the shortcut menu.

4. Click on the Sample Lines tab to view the list of lines in the group.

5. Click on the Sections tab to view the list of elements within the corridor that can be sampled and at the bottom what data currently is in each sample line.

6. Click on the Cancel button to exit the dialog box.

Task 3: Review the Data in a Sample Line

1. Expand the Sample branch for SL-4.

2. Expand the Section tree to view the surfaces in the section.

3. Click on the Top surface, right-click, and select Properties… from the shortcut menu.

4. Click on the Section Data tab and scroll the entry to view the values of the sample data for HWLongfellow Road.

5. Click on the OK button to exit the dialog box.



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Section Views

A section view contains the various sections, assemblies, and pipe networks. Like profiles, sections need a section view to document their elevations and offsets from the centerline. The look of a section view is the result of a style.

The primary focus of section view annotation is the assembly and its offsets and grades. The All Labels style assigned to the Assembly in the sample line group lists all of the possible labels an assembly can have in a section view. The label styles for Existing Ground, Top, and Datum are not necessary. The styles assigned to the surfaces Existing and Final Ground colorize their line work and do no labeling.

� Section views can be moved in a drawing and still retain their correct information.

� Erasing section views from a drawing erases the section data from the sample line entry in Prospector.

The Create Section View dialog box selects a section from the sample line list, determines what sections to plot, reports section statistics, and what annotation to use for the various sections. If you are only annotating the corridor assembly, all of the other sections should have Labels set to No Label. The labels in the All Codes style will annotate the assembly in the section view.

There are three ways to create section views: individually, organized in pages, or stacked in columns and rows.


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Create Section View

This command allows you to create a single section view from the section line group list. The command creates a section view from the data of the selected sample line.

� The Sample Line entry in the dialog box sets the sample line to draw.

Create Multiple Views

This command draws the section in the drawing in a column and row structure (All) or as pages of sections. The page definitions define an area for the sections and an area for a company border.

The changing or reassigning of Labels is also necessary in this dialog box. A user can change the assigned label by first sorting the section list by data source, selecting the first and last entry label entry for the source, and selecting the No Label style. The All Codes style provides the label styles for the assembly.

� The Group Plot Style option in the dialog box sets the method of creating multiple section views (All or by page sizes).

� You can also set the section view style and the band set style in this dialog.


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View Styles

A view style defines the vertical and horizontal section grid and its annotation. The horizontal lines represent the elevations and the vertical lines represent the offset distance of the grid.


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At the bottom of a section view is a band style that traditionally annotates the offsets of the section. What and how the annotation appears in the band is the result of a style.

Section Style

A section style simply assigns a layer and other layer properties to a section. The label styles for sections focus on the location of grade breaks, slopes, and offsets.


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Multi-Purpose Styles

The All Codes code style of the Multi-Purpose styles assigns the object and label style for assemblies of a corridor. This is the most important style for section labeling.

The section labels all of the point, link, or shape codes that have an assigned style in this dialog box.

� All link styles annotate a grade or slope.

� All point styles annotate an offset and elevation.


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Page Styles

A page style defines the area for sections for a sheet size. The section area is a sub-area of the entire sheet. The remaining area of the sheet is reserved for a border block.


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Exercise: Create Section Views

Task 1: Create a Single View


2. Select Sections > Create View… from the pull-down menu.

3. Set the Alignment to HWLongfellow – (1) and the sample line to SL-

124.

4. Scroll the data list to the right to see the Labels column for the HWLongfellow - section line. Change the Existing Ground label to No

Labels.

5. Repeat the previous step for the remaining entries in the label column.

6. Click on the OK button to place the section in the drawing.

7. Zoom and Pan to better view the section.


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8. In the Settings tab of Prospector, expand the Multipurpose Styles branch to see the Code Set Styles list.

9. Click on the All Codes style, right-click, and select Edit… from the shortcut menu.

10. In the Codes tab, expand the Link tree and locate the Pave entry.

11. Click on the icon at the right of the cell in the Label Style column, select the Flat Grades label style from the drop list, and click on the OK button to return to the All Codes style dialog.

12. Expand the Point tree and locate the ETW entry.

13. Click on the icon at the right of the cell in the Label Style column, select the Offset Elevation label style from the drop list, and click on the OK button to return to the All Codes style dialog.

14. Click on the OK button to end editing the All Codes Style and to see the new annotation on the cross section.

15. Close the drawing and DO NOT save the changes.

16. Reopen the drawing.

Task 2: Create Multiple Views – Plot All

1. Zoom and Pan to an empty area to the right of the site.

2. Select Sections > Create Multiple Views… from the pull-down menu.

3. Click on the Data Type heading to sort the list.


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4. In the Labels column select all the entries for Composite (click on the first Entry for Composite, hold the Shift key down, and click on the last one).

5. With these entries highlighted, click into the Labels column and choose No Labels for the style.

6. Repeat the assignment of No Labels for the Top and Datum surfaces.

7. Set the Group Plot Style to Plot All.

8. Click OK and place the sections in the drawing. Zoom and Pan to view them.

9. Close the drawing and DO NOT save the changes.

10. Reopen the drawing.

Task 3: Create Multiple Views – Plot Page

1. Zoom and Pan to an empty area to the right of the site.

2. In the Settings tab of Prospector, expand the Section View branch to see the list of Group Plot styles.

3. Click on Plot by Page, right-click, and select Edit… from the shortcut menu.

4. In the Plot Area tab, change the Sheet Style to Layout D Size, and click on the OK button to exit the dialog box.

5. Select Sections > Create Multiple Views… from the pull-down menu.

6. Click on the Data Type heading to sort the list.

7. In the Labels column select all the entries for Composite.

8. With these entries highlighted, click into the Labels column and choose No Labels for the style.

9. Repeat the assignment of No Labels for the Top and Datum surfaces.

10. Set the Group Plot Style to Plot Page and click on OK to place the sections in the drawing.

11. Zoom and Pan to view the sections. Save the drawing.


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Quantity Takeoffs

Civil 3D has two types of quantity takeoffs. The first type is earthworks, which represents the amount of material that needs to be brought into or taken out of the site to build the road design. The second type of quantity takeoff is the material volumes needed to build the road. These materials include asphalt pavement, concrete curbing, subbase materials, and other materials in the subassemblies that make up the assembly.

Earthworks

Earthwork volumes represent an amount of displaced site surface materials. The displacement represents the excavation or overfilling of high or low points in the existing ground surface along the path of the roadway.

The goal of most road designs is to have a balance between the amount of material available to fill in the low spots (called cut material) and the low spots needing the material (called fill). On any site not all excavated material (cut) will be reusable; the spoil materials may be from a bog, a type of material that does not compact well, or rock debris. The reuse of cut material can be a percentage of the overall cut value and the resulting value affects the overall earthwork calculation.

The calculation of earthworks is between the Existing Ground and the Datum of an assembly. The datum represents the road bed on which lies the subbase gravel, asphalt, and concrete materials. Earthwork volumes affect what revisions occur to a roadway design. For example, excessive cut material (material needing to be moved offsite) may lead to raising the vertical design or if possible moving the horizontal alignment to create less cut.


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Material Takeoff

The subassemblies of the assembly determine what materials are available for quantity takeoffs. These quantities come from the subassembly shapes. These shapes include curb, pave, shoulder, sidewalk, etc.

Quantity Takeoff Criteria

Civil 3D calculates takeoff values using Takeoff Criteria. The criteria identify two surfaces for earthwork calculations and a list of materials. The criteria file does not identify the names of the surfaces for earthworks, just that there are two surfaces, one below and one above. The materials list contains shapes from the assemblies in the catalog. Civil 3D identifies shapes as structures in the criteria file.


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Calculating a Takeoff

The Quantity Takeoff command of the Sections menu displays the Generate Quantity Takeoff Report dialog box.

The upper left of the dialog box sets the alignment and sample line group. The upper right identifies the criteria style and the style sheet to use to report the quantities. The remainder of the dialog box allows you to identify the specific surface or shape names that represent the data for the calculations. To select a surface name or a shape, simply click in the cell of the Object Name column for the name in the criteria file and select the name from the list of choices.


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Exercise: Quantity Takeoff

Task 1: Create Quantity Takeoff Criteria


2. Click on the Settings tab of Prospector to view its contents.

3. Expand the Quantity Takeoff branch to see the Takeoff Criteria list.

4. Select the Quantity Takeoff Criteria heading, right-click, and select New… from the shortcut menu.

5. Click on the Information tab and enter the name as Ascent Quantity

Takeoff Criteria.

6. Click on the Material List tab to view the panel.

7. Click on the Add New Material button at the top left to place a new entry in the list.

8. Click on the new Material Name entry and change it to Overall

Earthworks.

9. Click on the Quantity Type for Overall Earthworks and change it to Earthworks.

10. If necessary change the Data Type to Surface, enter the letters EG in the Select Surface cell, and click on the blue plus sign to add EG to the surface list.

11. Click in the Condition cell for EG and set it to Base.


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12. Enter Design in the Select Surface cell at the top of the dialog box and click on the blue plus sign to add Design to the surface list.

13. Click in the Condition cell for Design and change it to Compare.


15. Click on the new Material Name entry and change it to Asphalt

Concrete.

16. Click in the Quantity Type cell for Asphalt Concrete and change it to Structures.

17. In the Define Material area at the top of the dialog box, change the Data Type to Corridor Shape, type in Pavement as the material, and click on the blue plus sign to add the material type to Asphalt Concrete.


19. Click on the new Material Name entry and change it to Concrete.

20. Click in the Quantity Type cell for Concrete and change it to Structures.

21. In the Define Material area at the top of the dialog box, keep it set to Corridor Shape, type in Curb as the material, and click on the blue plus sign to add the material type to Concrete.


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22. Click on the OK button to create the Quantity Takeoff Criteria.


Task 2: Calculate Earthwork Volumes

1. Select Sections > Quantity Takeoff from the pull-down menu.

2. Change the alignment name to HWLongfellow and the sample line group to SLG-1.

3. At the top right change the Quantity Takeoff Criteria to Earthworks.

4. Click on the Select Style Sheet icon at the top right of the dialog box and set the Style Sheet to earthwork.xsl.

5. In the middle of the dialog box, click on <Click Here> for EG to display a list of surfaces, and select the Composite Surface.

6. Click on <Click Here> for the Design surface entry to display a list of surfaces and select the HWLongfellow – Top surface.

7. Click on the OK button to calculate the earthwork volume for the design.

8. Select Saveas from the File menu and save the report in your class folder.


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Task 3: Calculate Earthwork and Material Quantities

1. Select Sections > Quantity Takeoff from the pull-down menu.

2. If necessary, change the alignment name to HWLongfellow and the sample line group to SLG-1.

3. At the top right change the Quantity Takeoff Criteria to Ascent

Quantity Takeoff Criteria.

4. Click on the Select Style Sheet icon at the top right of the dialog box and set the Style Sheet to Select Material.xsl.

5. In the middle of the dialog box, click on <Click Here> for EG to display a list of surfaces, and select the Composite Surface.

6. Click on <Click Here> for the Design surface entry to display a list of surfaces and select the HWLongfellow – Top surface.

7. In the middle of the dialog box, click on <Click Here> for Pavement under Corridor shapes to display a list of shapes, and select Pave1 from the shapes list.

8. In the middle of the dialog box, click on <Click Here> for Curb under Corridor shapes to display a list of shapes, and select Curb from the shapes list.


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9. Click on the OK button to calculate the earthwork volume for the design.

10. Select Saveas from the File menu and save the report in your class folder.


1-58503-278-6 -- autodesk civil 3d 2006 essentials · a civil 3d assembly anchors the subassembly...

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