Lesson about Pictorial Drawings An orthographic drawing is sometimes supplemented with a pictorial drawing to optimize one’s understanding of the object. The pictorial drawing often represents a portion of the object and shows the method of its construction. ISOMETRIC DRAWING CABINET DRAWING PERSPECTIVE DRAWING This preentation also includes Steps in Sketching an Isometric View (BOXING METHOD)

2. *
*Imagine that you are standing flying
a plane and looking down at houses.
What specific part of the houses will
be clearly seen from the plane?
Justify your anser.

3. *
*An orthographic drawing is sometimes
supplemented with a pictorial drawing to
optimize one’s understanding of the object.
*The pictorial drawing often represents a portion
of the object and shows the method of its
construction.
*In others, the whole object is shown in one view.

5. *ISOMETRIC
DRAWING
*CABINET
DRAWING
*PERSPECTIVE
DRAWING

6. *
*GREEK WORDS: iso, “equal” and metros, “measure”
*The size of an isometric view is in equal measure either to
its orthographic views or to the scaled drawing. It is
generally in equal measure to the size of the orthographic
views. Hence, all measurements used or laid out in an
isometric drawing are taken from orthographic views.

8. *
*The most widely used method of drawing an isometric
view is the boxing method. In this method, a “box” is
drawn with its edges parallel to the isometric axes.
*These edges, or lines, are drawn very lightly and hence
they are sometimes called create lines or construction
lines.

9. BOXING METHOD

10. 1. Draw the three axes.
Be sure the cross
sections are about 30⁰
from the lower edge of
the paper.
2. Layout the principal
measurements on the
axes. Get the
measurements from the
orthographic views.

11. 3. Draw the “box” or
crate lines.
4. Draw the details
of the object.
5. Check the
accuracy of your
drawing.

12. 6. Trace the visible
edges with heavier
lines.
7. If required, show
the hidden edges.
8. Label the isometric
views.

14. *IDENTIFY THE CONNECTION OF EACH
LINE, POINT AND SURFACE.

15. *½ crosswise.
Draw the isometric
views of this given
orthographic view.
Remember that
lines are drawn
from horizontal,
vertical and
inclined surfaces.
*Measurements
are in Millimetres