projections of straight line9 prepared by Patil Pankaj N., SRES Kopargaon

1. Engineering Graphics
Unit 1: Projections of Line

2. Problem Statement (Phase I- 2013) :-
The end point A of 100 mm long line AB is in HP and
its another end point B is in VP. The front view of line
is inclined at an angle of 400 to HP. Draw the
projections of line , if the projector distance between
the end points of a line is 60 mm. Find the inclinations
made by the line with HP and VP. Locate the traces of
line.
Given Data:-
1. a’= on XY
2. b = on XY
3. TL= 100 mm
4. α = 400
5. Projector distance, PD = 60 mm

3. Draw XY line and locate projection of points a’Step 1

4. Take projector distance from point a’ = 60 mm and locate point b on XYStep 2

5. Draw a line a’b’ at an angle of α = 400
upto projector line b
Step 3

6. Draw a line from point b’ which is parallel to XY
From point a’ take a distance 100 mm which intersect locus of line b’
Step 4

7. Take a distance a’b’ and draw an arc on XY line which gets b2
Take a distance 100 mm put on point b2 and mark point a which
is located on the projector lines of a’
Step 5

8. Step 6 Join line ab = PL, and measure θ and ɸ

9. Step 7
Draw a traces :
HT extend a’b’on XY line from that draw projector which cuts ab
VT extend abon XY line from that draw projector which cuts a’b’