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C o p y r i g h t Š 2 0 0 8 E n g i n e e r e d E f f i c i e n c y, I n c
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Table of Contents
About this document: ................................................................................................................................... 3
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Chapter 1: Preparation ................................................................................................................................. 4 Exercise 1: Gathering Preliminary Information..................................................................................... 6
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Exercise 2: Sharing the EG Surface...................................................................................................... 12 Exercise 3: Setting up the Layout Drawing ......................................................................................... 15
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Exercise 4: Analyzing Existing Topography ......................................................................................... 19 Exercise 5: Developing a Preliminary Layout ...................................................................................... 22 Chapter 2: Lot Layout.................................................................................................................................. 30
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Exercise 1: Create Lottable Areas ....................................................................................................... 32 Exercise 2: Lay Out Lots ...................................................................................................................... 38 Exercise 3: Lot Cleanup and Refinement ............................................................................................ 43
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Exercise 4: Creating Lot Labels............................................................................................................ 49 Exercise 5: Creating Lot Tables ........................................................................................................... 55
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Chapter 3: Pond Volumes and Grading....................................................................................................... 57 Exercise 1: Pond Design ...................................................................................................................... 58
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Chapter 4: Road Design............................................................................................................................... 67 Exercise 1: Create Road Centerline Profiles........................................................................................ 69
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Exercise 2: Link Profiles at Intersections............................................................................................. 72
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Exercise 3: Create Intersection Geometry .......................................................................................... 76
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Exercise 4: Create Intersection Profiles .............................................................................................. 79
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Exercise 5: Create Typical Assemblies................................................................................................. 82 Exercise 6: Build the Corridor.............................................................................................................. 85
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Exercise 7: Design Curb Returns ......................................................................................................... 90
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Exercise 8: Design a Knuckle ............................................................................................................... 95
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Exercise 9: Build a Corridor Surface .................................................................................................... 98
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Chapter 5: Initial Earthwork...................................................................................................................... 103 Exercise 1: Analyze Earthwork Volumes ........................................................................................... 104
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Chapter 6: Pipe Network Layout............................................................................................................... 109
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Exercise 1: Preparation ..................................................................................................................... 110
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Exercise 2: Designing the Sanitary Sewer ......................................................................................... 115
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Exercise 3: Designing the Storm Drainage System............................................................................ 119 Chapter 7: Lot Grading.............................................................................................................................. 128
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Exercise 1: Mass Lot Grading ............................................................................................................ 129 Exercise 2: Grading Lot Lines ............................................................................................................ 134
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Exercise 3: Grading Building Pads ..................................................................................................... 139 Exercise 4: Creating an Overall Surface ............................................................................................ 142
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Exercise 5: Making Grading Adjustments ......................................................................................... 145 Chapter 8: Preparing Design Documents.................................................................................................. 147
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Exercise 1: Creating Plan and Profile Utility Plans ............................................................................ 148
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About this document:
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This workbook is designed to be used in conjunction with a live or recorded version of Engineered Efficiency’s Residential Design training. It contains all of the exercises necessary for completion of the class. It can be used to work through the training on your own, during one of our live training sessions, or any combination of the two. This document cannot be purchased and is available exclusively to EE customers who are eligible to participate in this training.
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If you have comments or suggestions regarding this document or the Residential Design class in general, please submit them via e-mail to eeLearning@eng-eff.com. Your feedback is very valuable to us and will help make our training the best that it can be.
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Chapter 8: Preparing Design Documents
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Chapter 7: Lot Grading INTRODUCTION
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Chapter Introduction
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In this chapter you begin by designating areas that are suitable for subdivision, then working through techniques to create, refine, label and analyze lot information. The following is a summary of each exercise you will perform in this chapter:
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Exercise 1 – Mass Lot Grading In this exercise you will build from the corridor and use feature lines to set rough elevations across many lots at once. Exercise 2 – Grading Lot Lines In this exercise you will use the model built in the previous exercise to set lot line elevations for each individual lot. Exercise 3 – Grading Building Pads In this exercise you will create building pad feature lines and set them at the correct elevation in reference to the lot lines. Exercise 4 – Creating an Overall Surface In this exercise you will combine the lot grading and corridor grading to create an overall surface. Exercise 5 – Making Grading Adjustments In this exercise you will adjust the corridor which will automatically adjust the lot line grading. The building pads will need to be adjusted manually.
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TASK(S)
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Use the corridor model as foundation for lot grading Add grading information for individual lots Refine lot grading
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Project Tasks
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CIVIL 3D FEATURE(S)
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Feature Lines Surfaces Grading Objects
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Civil 3D Features Used in this Chapter
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Exercise 1: Mass Lot Grading ACTIVITY/PROCESS
Action
Result
1.
Open theC7E1D1_ 67891C-SPGRAD.dwg drawing.
The drawing opens.
2.
Draw a polyline along the backs of the lots which begins at the midpoint of the back line of lot 32 and ends at the midpoint of the back lot line of lot 50
This polyline will eventually serve as the rear lot tie-in which will bring the lot grading to existing ground.
3.
Do the following to convert the polyline to a feature line.
The new feature line follows existing ground along the backs of the lots.
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On the Feature Lines toolbar, click Create from Objects.
Select the polyline and press Enter.
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On the Create Feature Lines dialog box, check the box next to Style and select _Lot Back.
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Click the option to Use current layer.
Check the box next to Assign
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Exercise 1: Mass Lot Grading
Click OK to dismiss the Assign Elevations dialog box.
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Click OK.
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Enter 6 for the offset distance.
Click the feature line
Pick a point toward the inside.
Enter -2 for the elevation difference.
Click the newly created feature line.
Pick a point toward the inside.
Enter 2 for the elevation difference.
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On the Feature Lines toolbar, click Stepped Offset.
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These feature lines define the swale along the rear lot lines. Currently the ditch is constructed as 2 feet deep with 3:1 side slopes.
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Do the following to create a swale along the backs of the lots.
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Elevations
In the top right view, copy the Basic Assembly to an open area to the right.
6.
Click the new assembly baseline, rightclick, and select Assembly Properties. Change the name of the assembly to Basic Assembly with Lot Grading.
This new assembly will be modified to include lot grading.
The assembly is renamed.
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On the Properties window:
The Properties window opens.
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Open the tool palettes window and click the Imperial – Generic tab. Click the Lot Grading subassembly tool.
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Exercise 1: Mass Lot Grading
For Side, select Left.
For Inside Width, enter 60
For Outside Width, enter 60
For Min Slope, enter 2%
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You are prompted to select a marker point.
Click the point on the assembly furthest to the left.
10.
Click the corridor, right-click, and select Corridor Properties.
The subassembly is inserted.
The Corridor Properties dialog box opens.
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Exercise 1: Mass Lot Grading Click the Parameters tab and change the assembly for Sawgrass Lane CL Region (3) to Basic Assembly with Lot Grading.
A new assembly is assigned in the region where you are grading lots.
12.
Click the Frequency button for the same region and change the frequency to 5 for tangents and curves.
This will improve the accuracy of the model in the area you are grading.
13.
Click the Target button in the same region. Assign the feature line representing the inside of the rear lot ditch as the Width target for EdgeOffset and the elevation target for EdgeElevation.
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This target will tie the subassembly to the feature line when the corridor is rebuilt.
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Click OK to dismiss all corridor dialogs and return to the drawing.
The newly built corridor represents mass grading of the lots.
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You will be prompted to name the feature line in the process.
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The LotGrade subassembly slopes upward at the minimum slope (in this case 2%) from the higher of the attachment point (behind sidewalk) or outer edge point (inside edge of ditch). This ensures that minimum slope is achieved.
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Exercise 1: Mass Lot Grading
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Exercise 2: Grading Lot Lines ACTIVITY/PROCESS
Action
Result
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Step
Open the C7E2D1_67891C-SPGRAD drawing located in the Chapter 7 class data folder.
The drawing opens.
2.
Select the corridor, right-click, and select Corridor Properties. Click the Codes tab and change the Code set style to Feature Lines Only.
The corridor links are hidden in plan view showing only the corridor feature lines.
3.
Click the Corridors menu > Utilities > Create Grading Feature Line from Corridor.
4.
Click the black feature line between the sidewalk and right of way.
5.
Select Grass and click OK. On the Create Feature Line from Corridor dialog box:
You are prompted to select a corridor feature line.
The Select a Feature Line dialog box opens.
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For Name, enter Front of Lots
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A new feature line appears. This feature line is dynamically linked to the corridor and will update if the corridor changes.
For Style, select _Lot Front
Select Use current layer
Ensure that Create dynamic link to the corridor is checked.
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Exercise 2: Grading Lot Lines
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Click OK.
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In the Create Feature Line from Corridor dialog box:
The Create Feature Line from Corridor dialog box opens.
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Click the salmon-colored corridor feature line running through the middle of the lots.
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For Name, enter High Points
For Style, select _Lot High Points
Select Use current layer
Ensure that Create dynamic link to the corridor is checked.
Click OK.
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On the Feature Lines toolbar, click Draw Feature Line.
The Create Feature Lines dialog box opens.
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A new feature line appears. This feature line is dynamically linked to the corridor and will update if the corridor changes.
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Exercise 2: Grading Lot Lines For Style, select _Lot Sides
Click OK.
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You are prompted to specify start point.
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In the Create Feature Lines dialog box:
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9.
Snap to the endpoints of the west line of Lot 33, from top to bottom. Press Enter to accept the default elevation of zero for each point.
A new feature line is drawn over the lot line.
11.
Use the Autocad EXTEND command to extend the new feature line to the linked feature line between the sidewalk and right of way.
12.
On Prospector, expand Sites > Lot Grading. Right-click Feature Lines and select Properties.
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10.
The Feature Line Site Properties dialog box opens.
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The feature line is extended and there is obvious interaction between the linked corridor feature lines and the lot side feature line. However, this area is not being constructed properly.
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Exercise 2: Grading Lot Lines Click the Options tab and check the box next to Filter unused styles. Drag and drop or use the arrow buttons to place the styles in the order shown below:
The reordering of the feature line styles causes the linked corridor feature lines to “drive” the lot side feature lines.
14.
Draw and extend all lot side feature lines working eastward through Lot 42.
15.
Unload the 67891C-SPLAYO xref. Click the General menu > Add Labels.
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13.
The Add Labels dialog box opens.
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The lot side feature lines are driven by the corridor through the linked feature lines. Because of this, changes to the corridor will automatically update the elevations along the lot sides.
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Exercise 2: Grading Lot Lines For Feature, select Line and Curve
For Line label style, select Lot Line Elev – Start.
Click Add.
Click one of the lot lines.
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A label will appear. The position of the label will depend on where you picked and the direction of the feature line.
Use the Lot Line Elev – Start and Lot Line Elev – End styles to label the front, back, and high point elevations of each lot.
Key elevations on the lot lines are labeled.
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17.
On the Add Labels dialog box:
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Exercise 3: Grading Building Pads ACTIVITY/PROCESS
Action
Result
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Step
Open the C7E3D1_67891C-SPGRAD drawing located in the Chapter 7 class data folder.
The drawing opens.
2.
Offset the Sawgrass Lane centerline alignment 60 feet to the outside. Change the color of the new polyline to color 9.
This represents the setback line: 30’ to the right of way and 30’ to the setback.
3.
Draw a rectangle in the first lot that is 45’ wide by 60’ deep. Align the front of the rectangle with the setback line and center it in the lot.
4.
On the Feature Lines toolbar, click Create Feature Lines from Objects. Click the rectangle and press Enter.
This polyline will represent the building pad.
The Create Feature Lines dialog box opens.
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Exercise 3: Grading Building Pads
You are returned to the Create Feature Lines dialog box.
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Next to Site, click Create New.
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Enter Building Pads for the Name and click OK.
For Style, select _Bld Pad and click OK.
7.
Do the following to raise the building pad feature line to the correct elevation:
The new feature line is in a different site and therefore is not affected by the feature line that crosses through it.
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6.
Click the new feature line, rightclick, and select Raise/Lower.
Type E at the command line and press Enter.
Enter an elevation difference of 743.70.
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The feature line is placed 0.5’ above the highest elevation to ensure drainage away from the building.
Do the following to label building pad elevations:
The building pad elevations are labeled.
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Click the General menu > Add Labels
For Feature, select Line and Curve.
For Line Label Style, select Pad
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Exercise 3: Grading Building Pads
Click the left line of the pad
Click the right line of the pad
Change the style to Pad Elev – End
Click the left line of the pad
Click the right line of the pad
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Click Add.
Use a window to select the building pad feature line and labels all at once.
For base point, snap to the high point at elevation 743.20.
For insertion point, snap to the high point at elevation 743.41
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Launch the COPY command.
Continue copying the building pad grading to the other lots. For some, the building pad will need to be rotated and/or moved into position. Stop at lot 43. Always use the high point of the lot as the base point.
All building pads are set.
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The grading and labels are copied and the elevations are correct based on the high point of the next lot.
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Do the following to copy the building pad grading to the next lot.
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Elev – Start.
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Exercise 4: Creating an Overall Surface ACTIVITY/PROCESS
Action
Result
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Step
Open the C7E4D1_67891C-SPGRAD drawing located in the Chapter 7 class data folder.
The drawing opens.
2.
On Prospector, right-click Surfaces and select Create Surface.
The Create Surface dialog box opens.
3.
On the Create Surface dialog box:
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For Name, enter Lot Grading
For Style, select Contours 1’ and 5’ (Design)
Click OK.
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The Lot Grading surface is added in Prospector.
Expand Surfaces > Lot Grading > Definition. Right-click Breaklines and select Add.
5.
Click OK and select all of the side lot lines, building pad feature lines, and the three rear swale lines. Press Enter when the selection is complete.
The Add Breaklines dialog box opens.
The lot grading is now displayed as contours.
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The road and lot grading is now included in the same surface.
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Do the following to create an overall FG surface: Change the style of Road FG and Lot Grading to _No Display.
Create a new surface named FGAll with a style of Contours 1’ and 5’ (Design).
Paste Lot Grading into FG-All
Paste Road FG in FG-All
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Exercise 4: Creating an Overall Surface
Thaw the layer C-TINN-VIEW. View the new surface in Object Viewer to examine the 3D construction of the grading.
The grading includes the road, building pads, swales between lots, and the rear lot swale.
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Exercise 4: Creating an Overall Surface
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As time permits, use the techniques shown in the previous exercises in this chapter to grade more of the lots and add their data to the lot grading surface.
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Exercise 5: Making Grading Adjustments ACTIVITY/PROCESS
Action
Result
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Step
Open the C7E5D1_67891C-SPGRAD drawing located in the Chapter 7 class data folder.
The drawing opens.
2.
On Prospector, expand Surfaces and right-click Lot Grading. Select Rebuild Automatic.
The two surfaces will now update automatically when grading changes are made.
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Repeat this procedure for FG-All.
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1.
In the top right view, zoom to the profile view for Sawgrass Lane. Change the PVI elevation of station 8+85.00 to 743.00
4.
Click the Update Profile Links ProPack tool and rebuild Project Corridor.
The profile is raised by 1 foot in this area.
The corridor and associated surfaces are updated. The contours near station station 8+85 have changed and the building pads are no longer at the correct elevation in reference to the new grading.
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Exercise 5: Making Grading Adjustments
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The grading is revised to match the changes to the corridor.
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Use the Raise/Lower feature line command to set the building pads at 0.5’ above the higher lot elevation.
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