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Steps to draw the Orthographic Views

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Rural Technology

Lets draw orthographic view of block shown in fig. 11.4 using third angle projection method. Draw a horizontal line XY in the middle of the paper.

  • Draw a rectangle measuring ‘height CO length and AC width’ below the line XY. This is the ‘Front View’ or the ‘Elevation.’ Leave some space; say 20 mm, between the line XY and top of the rectangle.
  • Draw two more rectangles on either side of the first rectangle. These are two ‘Side Views.’ These two rectangles must be admeasuring width of the object. Leave 20 mm space between each pair of rectangles.
  • Draw two vertical lines, AB and CD, from top of the Elevation and extend them above the XY line. These are ‘Projections’ from Elevation. These lines must be fainter than the rectangle.
  • Draw vertical projections, EF & GH, from the top of either Side View, but these projections should just touch the XY line.
  • Draw two more projections at 45°, HB & FJ, so as to intersect the extended vertical projections AB and CD, from the Elevation. Intersections of all these projections will give the ‘Top View’ or ‘Plan’, exactly above the Elevation. This set of 4 views-viz. Elevation, Top View and Side Views - is called the ‘Orthographic Views’ or ‘Orthographic Projections’

Please study the examples of orthographic projection given in the following figures:

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Rural Technology