1. Engineering Graphics 2018-19-I
Lecture 8
TA101A
Engineering Graphics I By
Dr. Mukesh Sharma
Professor
DEPARTMENT OF CIVIL ENGINEERING
INDIAN INSTITUTE OF TECHNOLOGY KANPUR
KANPUR , INDIA

2. Make-up Class on Saturday, September 01 at 12:10 PM in L20

3. Oblique Projections Produces 3-D views
Process virtually opposite to isometric view
Do not look perpendicular through projection plane
Object is not rotated
Object remains with a major face parallel to projection plane
Now one looks the projection plane with an oblique angle
Axes of height and width remains at 90 degrees
Axis of depth can vary in angle, ø
What is specialty of oblique projection.
Isometric S R U
35 to 450
Oblique

4. DRAW AN OBLIQUE DRAWING
1.draw a rectangle – overall width and height of the object
2. extend parallel lines from each corner of the box back at an angle
3. mark the extension lines at a point equal to the depth of the object.
4. connect the depth of lines to form a box.
5. add any details such as holes, notches, onto the front view (True size & True Shape).
6. extend the details the depth of the object.
7. complete sketch by darkening in the object

5. 40 50 90 65 25
R15
300

6. 300 X z y 90 50 65
R15 40 25 90 50 40
300

7. 600 450 C 300 A 900 B 25 Given (a) Receding axis is usually
Drawn at 300, 450 or 600
With the horizontal
Construct area
(b)
450
Draw the front face
(c)
Parallel
Construct receding surface
(d)
Draw arc on the rear face
(e) 25
Parallel
Heave the outline
(f)

8. 50 10 20
R 26 50 20 70
Ø 26

9. 50 70 20 10
ø26
R26 10 20 20
R26 50 20 70
Ø 26

10. How to select front face?

11. A B C
All Oblique views. Which one is preferred face?

12. A B
How to select front – contd…

13. Oblique Projections DOP not perpendicular to view plane n CGR Cavalier
(DOP at 45 )
Cabinet
(DOP at 63.4 ) k 24

14. List differences in Isometric and Oblique views

15. A CABINET
B CAVALIER

16. Parallel
Downward receding direction