1. Chapter 13
Site Plan Layout

2. Links for Chapter 13 Site Design Considerations Steps in Site Layout
Drawing Contour Lines
Drawing Profiles
Site Planning with CADD

3. Site Design Considerations
Minimum driveway and lawn slope of 1/4” per foot
Single-car driveway at least 10’
Double-car driveway at least 18’
Minimum turn radius of 15’ for a driveway

4. Site Design Considerations

5. Site Design Considerations
Leave room for expanded utilities
Do not encroach on easements (property right-of-way)
Follow basic grading rules
Identify remaining trees after construction
Design retaining walls to minimize erosion and maintain a level lawn

6. Property Lines Label boundaries with a bearing and distance
The Delta angle () is the included angle of the curve if the boundary is not straight

7. Steps in Site Layout Select the proper paper size and scale
Lay out the site plan based on a given plat or legal description using construction lines
Draw only the outline of the floor plan
Include setbacks, sidewalks, and other features

8. Steps in Site Layout

9. Steps in Site Layout Darken all property and other lines
Add dimensions and elevations
Keep extension and dimension lines short
Label important features
Add north arrow, legal description, title, scale, client’s name, and other pertinent information

10. Steps in Site Layout

11. Drawing Contour Lines
Grid Survey - Divides the plot into small squares like a checkerboard
Control Point Survey - Uses elevations recorded on a map to create the plot
Radial Survey - A series of angular and distance measurements are established from a given central point

12. Using Grid Survey
Drive stakes into the ground in a grid pattern at a particular elevation
Space stakes at a common interval
Label vertical lines with letters
Label horizontal lines with numbers (stations)
Transpose field notes onto grid

13. Drawing Contour Lines Draw a grid or create a GRID layer
Label elevation at grid intersection using field notes
Determine contour interval and connect points
Estimate remaining lines
Label elevation on index contour lines and darken them

14. Drawing Contour Lines

15. Drawing Profiles
Profile is a vertical section of the ground surface and earth below
Draw the profile line on the contour map
Establish vertical scale
Project a line vertically to elevation line from each contour crossing of the profile line
Draw the profile by connecting the points

16. Drawing Profiles

17. Drawing Grading Plan This plan shows the elevations after excavation
It shows areas where earth is removed (cut) and added (fill)

18. Drawing Grading Plan
Determine the angle of repose and areas to cut and fill
Draw parallel lines to represent elevation at the cut and fill
Mark points where parallel lines and contour lines intersect
Connect all points and shade cut and fill areas

19. Drawing Grading Plan

20. Site Planning with CADD
Site plans are more accurate
Symbols are loaded into the program for easy retrieval
Terrain model shows contour lines in 3D

21. Site Planning with CADD