1. PowerPoint Presentation
Publisher The Goodheart-Willcox Co., Inc. Tinley Park, Illinois 1

2. Chapter 10
Plot Plans 2

3. Chapter 10 Overview Introduction Property Lines Contour Lines
Topographical Features
Location of the Structure on the Site
Drawing a Plot Plan Manually
Landscape Plans
Using CADD to Draw a Plot Plan 3

4. Learning Objectives
Identify the various features shown on a typical plot plan.
Visualize land elevations from contour lines.
Recognize typical topographical symbols and apply them to site considerations.
(continued) 4

5. Learning Objectives Properly locate a building on a site.
Draw a plot plan using correct symbols and conventions.
Draw a plot plan using CADD. 5

6. Introduction to Plot Plans
A plot plan is a drawing that shows the site, location, and orientation of the buildings on the property.
Uses information provided by a surveyor and recorded on a site plan.
Shows several specific features related to the site and buildings on the property. 6

7. Typical Site Plan 7

8. Plot Plan Features Plot plans contain:
Length and bearing (direction) of each property line.
Location, outline, and size of buildings on the site.
Contour of the land.
Elevation of property corners and contour lines.
Meridian arrow (north symbol). 8

9. Plot Plan Features Plot plans also show:
Trees, shrubs, streams, and gardens.
Streets, driveways, sidewalks, and patios.
Location of utilities.
Easements for utilities and drainage.
Well, septic tank, and leach field.
Fences and retaining walls.
Lot number or address of the site.
Scale of the drawing. 9

10. Property Lines Property lines define the site boundaries.
Length and bearing are identified.
Measured to 1/100 foot.
A benchmark is shown with a symbol and represents a point of reference.
The order of drawing property lines is clockwise. 10

11. Property Line Designation
This property line is ' long and has a bearing of N 89° E. 11

12. Bearings 12

13. Benchmarks 13

14. Drawing Property Lines14

15. Contour Lines
Contour lines connect points that have the same elevation.
Help describe the topography of the site by defining shape and elevation.
Reference is mean sea level or a selected point.
Contour lines are the result of a survey.
They are plotted from a grid of elevations. 15

16. Contour Terms and Features
Contour interval is the vertical distance between two adjacent contour lines.
Closely spaced contour lines indicate a steep slope.
Contours that are smooth and parallel show that the ground surface is even.
Closed contour lines represent summits and depressions. 16

17. Contour Terms and Features
Contour lines of different elevations do not cross.
Contour lines cross watersheds and ridge lines at right angles. 17

18. Contour Lines
This illustration shows a five foot contour interval. 18

19. Contour Lines
The relative space of contour lines represents the slope angle. 19

20. Contour Lines
Contour lines show relative roughness of the land as well as the elevation. 20

21. Contour Lines
Summits and depressions are represented by closed contour lines. 21

22. Contour Lines
Ridges and valleys should be identified using the proper symbols. 22

23. Contour Lines
Show estimated contours with a dashed line. Surveyed contours are represented by solid or long dashed lines. 23

24. Contour Lines
Contour lines plotted from an elevation grid using data supplied by a surveyor. 24

25. Topographical Features
Topographical features include:
Trees, shrubs, streams, roads, utilities, fences, and similar features.
These features are represented by symbols; most are standardized.
Nonstandard symbols should appear with an explanation in a legend on the drawing. 25

26. Topographical Symbols26

27. Topographical Symbols
When color is used with topographical symbols, follow these guidelines.
Black is used for lettering and human-built works, such as roads, houses, etc.
Brown represents all land forms such as contour lines.
Blue is used for water features.
Green is for vegetation. 27

28. Locating the Structure on Site
Analyze the site to determine the ideal location for the structure.
Analysis should include:
Natural contour, trees, view.
Surrounding houses, code restrictions.
Style of house to be built.
Solar orientation, winds.
Placement of well and septic system.
Size and shape of the site. 28

29. Locating the Structure on Site
Once the location is decided on, the structure can be drawn on the plot plan.
There are three commonly accepted methods of representing a house on the plot plan:
Lay out exterior walls and shade area.
Draw a typical roof plan.
Draw exterior walls thickened.
Dimension the location of house on site. 29

30. Locating the Structure on Site
First method of locating a house on a plot plan. 30

31. Locating the Structure on Site
Second method of locating a house on a plot plan. 31

32. Locating the Structure on Site
Third method of locating a house on a plot plan. 32

33. Locating the Structure on Site
Dimensioning a house that is not parallel to a lot line. 33

34. Plot Plan Manual Drawing Procedure
Select a scale to provide the largest drawing on the paper size.
Lay out property lines. Add length and bearing of each property line.
Add scale and meridian arrow.
Select a contour interval and plot the contour lines lightly.
Letter the elevation of each contour line and property corner.
(continued) 34

35. Plot Plan Manual Drawing Procedure
Property lines located and identified; meridian arrow, scale, contour lines, and corner elevations shown.
(continued) 35

36. Plot Plan Manual Drawing Procedure
Locate the house on the site and dimension the overall length and width of the house.
Dimension the distance from the house to the two adjacent property lines.
Identify the elevation of a reference corner of the house.
(continued) 36

37. Plot Plan Manual Drawing Procedure
Draw surrounding features such as the driveway, sidewalks, and patios.
Determine the centerline of the street and location of utilities using proper symbols.
Add the well and septic system, if required.
(continued) 37

38. Plot Plan Manual Drawing Procedure
The house, drive, and patio are positioned on the site and dimensioned. 38

39. Plot Plan Manual Drawing Procedure
Draw other topographical features such as trees and shrubs.
Darken in contour lines.
Check your drawing to be sure that it is complete.
(continued) 39

40. Plot Plan Manual Drawing Procedure
The completed plot plan. 40

41. Typical Plot Plan
A plot plan of a large site and house with its own septic system and well. 41

42. Landscape Plans
The landscape plan is designed to show the type and placement of trees, shrubs, flowers, and pools on the site.
Provides an excellent way to plan the total setting for the home.
Uses symbols to represent plants and key them to a chart.
Repeats much of the information on the plot plan. 42

43. Landscape Plan
Typical landscape plan. 43

44. Landscape Plan
Result of good planning. 44
(Elk Corporation)

45. CADD Plot Plans
Site plans, plot plans, and landscape plans can be drawn using CADD.
General-purpose CADD can be used.
Application specific software facilitates drawing plot plans.
Compatibility is a concern when using two or more packages together. 45

46. CADD Plot Plans
This computer-generated rendering depicts the relationship between the structure and the site. 46
(Helmuth A. Geiser, Member AIBD)

47. CADD Plot Plans
Select the plotting scale for the plot plan that will provide the largest drawing on the size of paper selected.
Lay out the property lines using proper linetypes and symbols.
Show elevations.
Use a separate layer for the property lines.
Locate the buildings on the site.
(continued) 47

48. CADD Plot Plans
The property lines have been drawn and the structure located.
(continued) 48

49. CADD Plot Plans
Draw the contour lines on their own layer and add elevations.
Add the house reference corner location and dimension the location.
Add other house features such as roof lines.
Show the overall dimensions of the house and location on site.
(continued) 49

50. CADD Plot Plans The house location has been dimensioned. (continued)50

51. CADD Plot Plans
Add other topographical features such as trees, streams, and right-of-ways.
Choose appropriate layers for these features.
Include property line data and meridian arrow.
Add the scale, title, utilities, and features unique to the situation.
(continued) 51

52. CADD Plot Plans
The completed plot plan. 52

53. Glossary
Benchmark.
A permanent object used by surveyors to establish points of reference. If the property corner begins or ends on a benchmark, it is usually identified on the drawing with a special symbol.
Contour Interval.
The vertical distance between two adjacent contour lines.
Contour Lines.
Help describe the topography of a site by depicting shape and elevation of the land. A contour line connects points that have the same elevation. 53

54. Glossary Landscape Plan.
Designed to show the type and placement of trees, shrubs, flowers, gardens, and pools on the site.
Mean Sea Level.
A standardized elevation.
Plot Plan.
A plan view drawing that shows the site and location/orientation of the buildings on the property.
Property Lines.
Define the site boundaries. The length and bearing (direction) of each line must be identified on the plot plan. 54

55. Glossary Topographical Features.
Include trees, shrubs, streams, roads, utilities, fences, and similar features. These features are represented by symbols. 55