The document introduces engineering drawing, emphasizing its importance as a graphic language that effectively communicates size, shape, and features of objects. It discusses the necessity of standardized drawing practices governed by various international codes, such as ISO and ANSI, to ensure consistent interpretation across different regions. Additionally, it outlines the significance of drawing scales, including standard ratios for enlargements and reductions, and highlights various basic line types used in technical drawings.

1. Engineering Drawing
An Introduction

2. Engineering Drawing
Importance

3. Graphic Language & Effectiveness
Try writing the description of these
pictures……………

4. Graphic Language & Effectiveness
And let someone attempt to make a sketch or visualize
from your description.
………………..………Or these pictures

5. The word language is
inadequate
for describing the
size
size, shape
shape and features
features
completely as well as concisely.
It can be found that …
Graphic Language & Effectiveness

6. It can be found that …
Graphic Language & Effectiveness

7. It can be found that …
Graphic Language & Effectiveness

8. Engineering Drawing
Standards

9. Standards Definition
Drawing standards are set of rules
set of rules that govern how
technical drawings are represented.
Drawing standards are used so that drawings convey
convey
the same meaning
the same meaning to everyone who reads them.
Why Necessary

10. ISO International Standards Organization
Standard Code
ANSI American National Standard Institute
USA
JIS Japanese Industrial Standard
Japan
BS British Standard
UK
AS Australian Standard
Australia
Deutsches Institut für Normung
DIN
Germany
Country Code Full name
Bureau of Indian Standards
BIS
India

11. Engineering Drawing
Drawing Sheet

12. Drawing Sheet : Standard size
Trimmed paper of
a size A0 ~ A4.
Standard sheet size
(JIS)
A4 210 x 297
A3 297 x 420
A2 420 x 594
A1 594 x 841
A0 841 x 1189
A4
A3
A2
A1
A0
(Dimensions in millimeters)

13. Drawing space
Title block
d
Border
lines
Drawing Sheet : Orientation & Margin
A3 297 x 420

14. Engineering Drawing
Drawing Scale

15. Drawing Scales : Definition
Drawing Actual
Length, size
:
Scale
Scale is a ratio between the linear dimension of a
drawn representation of an object and the actual object.
1 2
20
10

16. Designation of a scale consists of the word “SCALE”
followed by the indication of its ratio, as follows
SCALE 1:1 for full size
SCALE X:1 (X > 1) for an enlargement
enlargement scales
SCALE 1:X (X > 1) for a reduction
reduction scales
Drawing Scales : Designation
Drawing scale is commonly found in a title block.

17. Standard reducing scales are
1:2, 1:5, 1:10, 1:20, 1:50, 1:100
Drawing Scales : Standard scale
Standard enlarging scales are
2:1, 5:1, 10:1, 20:1, 50:1, 100:1

18. Engineering Drawing
Line Types

19. Basic Line Types

20. Basic Line Types An Example

21. "When you do not know what to choose, show
total involvement in everything."
-Sadhguru.
Quotes On Life