Textbook of Engineering Drawing, Second Edition

--__ Orthographic Projections 5.15

c' d'

0

""

x

V.P

.p 0

y

x bi

ru

10

30

Fig. 5.18 Line Parallel to both the Planes

1. Draw the xy line and draw a projector at any point on it.


2. To obtain the front view mark c' at a distance of 40mm abvoe xy (H.P.). The line CD is
   parallel to both the planes. Front view is true lenght and is parallel to xy. Draw c' d' parallel
   to xy such that c' d' = CD = 30 mm, which is the true length.


3. To obtain the top view; the line is also parallel to V.P and 20 mm in front ofV.P. Therefore on
   the projector from c', mark c at distance 20 mm below xy line.


4. Top view is also true length and parallel to xy. Hence, cd parallel to xy such that cd=CD=30mm
   is the true length.(Fig.5.18).

3. Line parallel to v.p and inclined to RP.

Problem: A line AB 40 mm long is parallel to v.p and inclined at an angle of 300 to HP. The

end A is 15 mm above HP and 20 mm in front of v.P. Draw the projections of the line.

Solution: (Fig.5.19)

1. A is 15 mm above H.P mark a', 15 mm above xy.

x

LD

X. VP'-'

. P
o (\J

a

Fig. 5.19 Line parallel to V.P and inclined to H.P.

b'

y

b