PLAN OBLIQUES
P obliques present a higher angle of view t han
lan
isometricdrawings and emphasize the set of
horizontal planes by revealing their true size, shape,
and proportions.
/
j
I
I
I
I
I
I
I
I
I
I
I
I
To construct a planoblique, begin with a plandrawing and rotate
it to the desired angle relative to ahorizontal on the drawing
sheet or board.
· When drafting a plan oblique, the triangles encourage the use of
45°-45° and 30°-60°angles in establishing t heorientationof
the principal horizontal planes.
• Note that we can emphasize one of thesets of vertical planes
over theother or show them to be of equal importance b varying
y
this angle.
/
T
• Ina 45•-45° plan oblique, both principal sets of vertical planes
receive equal emphasis.
• Ina30°-60° plan oblique, one principal set of vertical planes
receives more emphasis than the ot her.
From the rotated plan view, we project the vertical edges and
planes of the subject.
• We usually lay out and draw these vertical dimensions to their
true lengths.
T offset theappearance of distortion, we may reduce the
o
vertical dimensions to 112. 2/3, or 3h of their true lengths.
PARALINE DRAWINGS/ 77