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Plot Plans

Chapter 8

Definition and Purpose

A plot plan is a plan view drawing which show the site and
location of the building on the property.

Definition and Purpose

Plot plan shows:


Property Lines

Property lines define the site boundaries

The length and bearing of each line must be identified on the
plot plan

Measured with an engineers scale to 1/100’

Bearing angles are recorded in degrees and minutes (seconds)

S 63


Property Lines

Property Corners

Identified with a special symbol


Where the property corner begins and ends

Contour Lines

A contour is a line connecting points which have the same

Contour lines help to describe the topography of the site by
depicting shape and elevation of the land.

Survey uses a mean sea level.

Home construction

relative elevations are sufficient.

Contour Lines

Page 156

Topographical Features

Represented by symbols

non standard symbols should appear in the legend of the

Topographical Drawing Color


lettering the works of man (roads, houses)


land forms (contour lines)


water features (lake, stream, marsh)


vegetation (trees)

Location of Structure on Site

Analyze site to determine best location of house on site




surrounding houses

code restrictions

Style of house

Solar orientation


Placement of septic

Location of Structure on Site

Three methods of drawing house on site

1. Lay out the outside of the exterior walls omitting all interior
walls and roof.

Shade or crosshatch space covered by house

Location of Structure on Site

Three methods of drawing house on site

2. Draw the exterior walls as hidden lines with the roof
shown as solid lines

Location of Structure on Site

Three methods of drawing house on site

3. Show all exterior wall thickened with all interior walls,
windows and doors omitted

* House must be dimensioned on all three types of drawings

Procedure for Drawing Plot Plan

Page 160

Landscape Plot Plans

Designed to show the type and placement of trees, shrubs,
flowers, gardens and pools on the site

Plans the total setting for the home

Symbols are used to represent various types of trees and

Footings, Foundations and

Chapter 9

Footings, Foundations & Concrete

Staking out house location

1. Locate each corner of the house by laying off the
distances indicated on the plot plan.

2. The position of all corners should be checked for
accuracy by diagonal measurement.

3. A control point is needed to determine the depth
of excavation and foundation wall height.


For footings and foundations the top soil is usually
removed and saved for final grading.

Excavation of footings should extend a minimum of 6
inches, into undisturbed earth.

Excavation of footings must also be extend down to a
minimum of 6 inches below the average maximum frost
penetration depth.


Remove the top soil.

Excavation must be below frost line for footing

Excavation must be large enough for work space and
foundation drains.


Increase the support capacity of the foundation wall by
spreading the load over a large area.

Footing thickness is equal to the foundation wall thickness
and footing width is twice the wall thickness.

Foundation Walls


is the most common type of foundation.

Slab foundation is an extension of a slab floor.

Pier and Post foundations serve as an auxiliary foundation to
support long spans.

Basement Walls

Basement walls are controlled by local building codes.

Beams and girders are used to support floor joist.

Lintels are a horizontal structural member that supports the
load over an opening such as a door or a window.


Concrete is a result of combining

cement, sand, aggregate
and water.

Cement is composed of a mixture of lime, silica, alumina,
iron components

The Foundation

Chapter 10

The Foundation Plan

Definition and Purpose

plan view drawing in section which shows the location and size
of footings, piers columns, foundation walls, and supporting

The Foundation Plan Includes:

Footings for foundation walls, piers, columns

Foundation walls

Piers and columns

Dwarf Walls

Partition walls, doors and bath fixtures

Openings in foundation wall such as windows, doors and

The Foundation Plan Includes:

Beams and pilasters

Direction, size and spacing of floor joists

Drains, sump

Details of foundation and footing construction

Complete dimensions and notes

Scale of drawing

The Foundation Plan


The foundation plan is prepared primarily for the excavator,
masons and cement workers who build the foundation

The Foundation Plan

Preliminary steps to drawing a foundation plan

examine the floor plan to determine the type of exterior walls

examine plot plan to anticipate the need for stepped footings
and retaining walls

Determine the size of footings and foundation walls required
from information available.

Drawing The Foundation Plan

1. Select Scale

2. Locate outline on paper

3. Draw the foundation walls, piers, and

columns and
foundation for chimney

4. Indicate breaks in found. Wall for

windows, doors,

5. Layout and draw footings (Hidden)

Drawing The Foundation Plan

6. Draw footings for piers

7. Draw footings for fireplace and chimney

8. Locate the supporting beam

9. Show size, spacing and direction of the

floor joists.

10. Identify the location of sections

11. Draw necessary sections and


Drawing The Foundation Plan

12. Determine the location of dimensions

needed to show
the size of all

aspects of the foundation

13. Draw the dimensions and dim. lines

14. Letter and notes

15. Shade the foundation wall drawing

proper symbols.

Drawing The Foundation Plan

16. Add the title block , scale and name

drawing in the proper location

17. Check drawing to be sure you have

all necessary info.

The Basement/Foundation Plan

Basements are usually included in cold climates. Cheaper to

The basement plan is a combination floor and foundation

Includes information commonly shown on the foundation plan
and at the same time show interior walls, stairs, windows and

Procedures For Drawing a Basement

1. Select Scale

2. Draw the foundation walls, piers, and

columns and
foundation for chimney

3. Draw footings for foundation

4. Locate and draw the beam and

or bearings wall partition

5. Design room layout in basement area

and darken in the

Procedures For Drawing a Basement

6. Indicate breaks in basement walls

7. Locate and draw stairs

8. Show size, spacing and direction fo


9. Identify the location of sections

10. Draw necessary sections

11. Locate and draw bath fixtures,

hot water heater, etc.

Procedures For Drawing a Basement

12. Determine the location of dimensions

13. Dimension

14. Letter any notes

15. Show electrical switches, outlets and


16. Shade the foundation walls with


Procedures For Drawing a Basement

17. Add the title block, scale and name of drawing

18. Check drawing to be sure you have I

included all
necessary information