This document provides an overview of AutoCAD and its uses. It discusses what AutoCAD is, common projection and drawing types in AutoCAD like orthographic and isometric. It also covers CAD file formats, advantages of CAD, common CAD users, and engineering drawing types. Keyboard shortcuts and functions keys in AutoCAD are listed. Examples of civil engineering drawings created in AutoCAD like building drawings, center line plans, and layout drawings are also provided.

1. K.SOLAI RAJA.,B.E. (CIVIL)
DESIGN CADD ENGINEER
CADD CENTER DINDIGUL
AUTO CAD
64 Hr’s

2. Introduction to AutoCAD
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3. What is AUTOCAD
AutoCAD is a Software Application
Which Is Used To Design Draft 2D &
3D Drawings
CAD – Computer Aided Design
CADD - Computer Aided Design & Drafting
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Projections:
1.Orthographic Projections
2.Isometric Projections
3.Oblique Projections
4.Perspective Projections
Drawings:
2D Drawings
3D Drawings
Isometric Drawings
Perspective Drawings

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Orthographic Projection Isometric Projection
Oblique Projection
Perspective Projection

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Angle Projections:

7. HISTORY :
 The Interact CAD Package in 1970’s Developed by
MIKE RIDDLE.
 In 1982, JOHN WALKER to developed Cad
Software in California.
1984 – Auto Desk company has purchased from john
walker and release in the name of Auto CAD.
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CADD File Format:
*.dwg - AutoCAD Drawing
*.dws - AutoCAD Drawing Standards
*.dwt - AutoCAD Templates

8. CAD Advantages
Very high dimension accuracy.
Time, cost, money save.
Easy modification and draw.
Less error.
We can send Email.
We can create password.
Storage facility.
User friendly software.
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9. Users of CAD
CAD is used by:
Drafters
Designers
Engineers
Architectural
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Civil, Architectural
Mechanical, Electrical, Marine, Aeronautical,
Automobile, etc.,

10. ENGINEERING DRAWING
TYPES:
View based drawing.
Dimension based drawing.
Engineering language.
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11. UNITS
Decimel – mm, cm, m, km.
Engg & Architectural – inches, feets.
Scientific – light years.
Fractional – micro inches.
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Angle:
Decimal Degree, Deg/Min/Sec, Grads,
Radians, Survey Units
Precision:
Sets the number of Decimal places or
fractional size displayed for linear Measurement
Example: 0, 0.0, 0.00, 0.000

12. LIMITS
Limits Sets an Invisible boundary in the Drawing Area by
Specifying Lower left & Upper Right Corner of the
boundary
•Initial : 0,0.
•Secondary :
A0 - 841 x 1189
A1 - 594 x 841
A2 - 420 x 594
A3 - 297 x 420
A4 - 210 x 297
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Application Example:
A0, A1 - Technical Drawings, Posters
A2,A3 - Drawings, Diagrams, Large Tables
A4 - letters, Magazines, Forms, Catalogues, laser
Printer, Photocopying Machines
A5 - Note Pads
A6 -Postcards
A6,A5,B6,B5 - Books
C6,C5,C4 - Envelops for Letters:
unfolded (C4),folded (C5),folded (C6)
B4,A3 - Newspapers

14. CO ORDINATE SYSTEM
It means flow to draw the drawing without
using mouse,(only using keyboard) it is called
co-ordinate system.
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TYPE:
1.Absolute Co-Ordinate System.
2.Relative Rectangular Co-Ordinate System.
3.Relative Polar Co-Ordinate System.

15. ABSOLUTE CO-ORDINATE SYSTEM
All points are Measured from the Origin ( 0,0 ). This Based
on X,Y point.
X – Horizontal Axis
Y – Vertical Axis
C: L (line)
C:2,2
C: 2,8
C: 8,8
C: 2,2
C: 0,0
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X
Y

16. RELATIVE RECTANGULAR CO
ORDINATE SYSTEM
Based On The Last Point Entered. Use A Relative Co-
ordinate When You Know The Location Of A Point In
Relation To The Previous Point.
This based @ X,Y Distance
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a
b
x
0,0

17. RELATIVE POLAR CO ORDIANATE
SYSTEM
A Combination of Angle and Distance input is
called Polar Co-ordinate System
This based on @ Distance < Angle
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x
y
30
0

18. Standard Screen Layout
AutoCAD contains Ten pull-down menu items
• File
• Edit
• View
• Insert
• Format
• Tools
• Draw
• Dimension
• Modify, and Help
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Auto CAD Tools:
Drawing Tools
Modify Tools
Annotation
Properties
Layers
Utilities
Clipboard
Parametric Modeling
Display Control
Dimension Control
Inquiry Commands
Print & Plot

21. Function Keys
• Function Keys provide instant access to commands
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[F1] - Help
[F2] - Flip screen from graphics to text toggle On/Off
[F3] - Displays Osnap On/Off
[F4] - Displays 3D Osnap On/Off
[F5] - Isoplane (Left, Right, Top)
[F6] - Coordinate display
[F7] - Grid mode toggle On/Off
[F8] - Ortho mode toggle On/Off
[F9] - Snap mode toggle On/Off
[F10] - Polar Tracking mode toggle On/Off
[F11] – Object Snap Tracking On/Off
[F12] – Command Window Inter Change

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KEYBOARD SHORTCUTS

23. TOGGLE GENERAL FEATURES
Ctrl+d Toggle coordinate display
Ctrl+g Toggle Grid
Ctrl+e Cycle isometric planes
Ctrl+f Toggle running object snaps
Ctrl+h Toggle Pick Style
Ctrl+Shift+h Toggle Hide pallets
Ctrl+i Toggle Coordinates
Ctrl+Shift+i Toggle Infer Constraints
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24. MANAGE SCREEN
Ctrl+0 Clean Screen
Ctrl+1 Property Palette
Ctrl+2 Design Center Palette
Ctrl+3 Tool Palette
Ctrl+4 Sheet Set Palette
Ctrl+6 DB Connect Manager
Ctrl+7 Markup Set Manager Palette
Ctrl+8 Quick Calculator
Ctrl+9 Command Line
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25. MANAGE DRAWINGS
Ctrl+n New Drawing
Ctrl+s Save drawing
Ctrl+o Open drawing
Ctrl+p Plot dialog box
Ctrl+Tab Switch to next
Ctrl+Shift+Tab Switch to previous drawing
Ctrl+Page Up Switch to previous tab in current drawing
Ctrl+Page Down Switch to next tab in current drawing
Ctrl+q Exit
Ctrl+a Select all objects
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26. MANAGE WORKFLOW
Ctrl+c Copy object
Ctrl+x Cut object
Ctrl+v Paste object
Ctrl+Shift+c Copy to clipboard with base point
Ctrl+Shift+v Paste data as block
Ctrl+z Undo last action
Ctrl+y Redo last action
Ctrl+[ Cancel current command (or ctrl+)
ESC Cancel current command
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AutoCAD CIVIL DRAWINGS
BUILDING DRAWINGS
CENTER LINE PLAN
FOOTING PLAN
COLUMN PLAN
BEAM PLAN
SLAB PLAN
STRUCTURAL DETAILING DRAWINGS
AREA LAYOUT DRAWING
APPORED DRAWING
SURVEY & LEVELLING DRAWINGS
CONTOUR MAP

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BUILDING DRAWINGS
AREA LAYOUT DRAWING
ORTHOGRAPHIC DRAWING

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BLUE PRINT
DRAWINGS
3D DRAWINGS

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LAYOUT DRAWING

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ORTHOGRAPHIC DRAWING

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ISOMETRIC DRAWING

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THANK YOU