Page 57 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Fig 5

Exercise 4.6
Draw the Orthographic views of a regular hexagonal pyramid of side 20 mm and height 40 mm given its position
as below. (Fig 6A)

Fig 6

– standing vertically with its base on HP and one side of the hexagonal base parallel to VP.

Note: The pyramid has 6 triangular faces and one hexagonal base. The plan will show the true shape
of the base and other six triangular faces are fore-shortened.

In this elevation, three triangular faces are seen and all of them are fore-shortened.

• Mark the centre of hexagon (Point P) and draw lines from P to the six corners of the hexagon. Now this is the
required plan. (Fig 6B)
• Project this P from plan upwards and mark P' at a distance of 75 mm from XY line.

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CITS : Engineering Drawing (Mechanical) - Exercise 4