Page 57 - CITS - ED - Mechanical
P. 57
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.
44
CITS : Engineering Drawing (Mechanical) - Exercise 4