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ISOMETRIC PROJECTION

AN EXPLANATION

V. Ryan 2007

 

Isometric drawing is way of presenting designs/drawings in three dimensions. The example below has been drawn with a 30 degree set square. Designs are always drawn at 30 degrees in isometric projection. It is vital that drawing equipment such as T-squares and 30/60 degree set squares are used carefully. The drawing paper should be clip securely to a drawing board.

 
 
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1. Draw two basic 30 degree guidelines, one to the left and one to the right, plus a vertical guideline in the centre of the drawing. In this example three edges of the cube have been drawn over the guidelines (they are slightly darker)

2. Draw guidelines to help you start constructing the left and right sides of the cube. Remember to use a 30 degree set square for the 'angled' lines.

 
 

4. Complete the top of the cube by projecting lines with the 30 degree set square as shown below.

 
 

Shading can be quite important. First try producing a simple outline (dia A) and then try the shading techniques seen in dia C and dia C. See previous sheet for shading techniques.

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