Graphic Design & Printing Technology

Graphic Design & Printing Technology

ISOMETRIC DRAWING

Exercise:Draw the isometric drawing of a rectangular prism of base 30 mm x
15 mm and the height 50 mm.

• Draw the isometric projection of a cube of side 50mm


• Draw the three isometric axes through point ‘A’.


• Mark AB = 15 mm, AD= 30 mm and AH =50 mm representing the three
  sides of prism.


• Draw two vertical lines parallel to the line AH through points B and D.


• Similarly draw two more lines parallel to AB and AD through point H.


• Mark G and E the intersecting points.


• Draw lines parallel to GH and HE through points G and E intersecting
  point is F.


• Draw lines parallel to AB & AD through points D and B respectively
  intersecting at C.


• Join CB & CD with dash lines.


• Join F and C also with dash lines.


• Rub off the construction lines and complete the prism.

AUXILIARY VIEW

If a surface of an object is inclined to any of the planes of projection, the view
of the surface of that plane will not show its true shape and size. To overcome
this difficulty a view of the inclined surface is projected on an imaginary plane
parallel to this inclined surface. This imaginary plane is called Auxiliary plane
and the view obtained on it is called Auxiliary view.

SECTIONAL VIEWS

Interior details of an object cannot be shown on principal exterior views. In
such cases an imaginary cutting (sectioning) plane may be used to cut through