MOST COMMON PICTORIAL DRAWINGSand Steps in Sketching an Isometric View

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)

1. PICTORIAL DRAWINGS

2. LOOK BACK 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. 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. In others, the whole object is shown in one view.

4. MOST COMMON PICTORIAL DRAWINGS

5. ISOMETRIC DRAWING CABINET DRAWING PERSPECTIVE DRAWING

6. ISOMETRIC DRAWING 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.

7. FIRST POSITION SECOND POSITION THIRD POSITION

8. BOXING METHOD 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. Steps in Sketching an Isometric View ( 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.

13. IDENTIFY THE CONNECTION OF EACH LINE, POINT AND SURFACE.

14. 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