Page 117 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Fig 2

Exercise 7.3
Draw the development of the lateral surface of a open hexagonal prism of side 20 mm and height 60 mm. (Fig 3)

• Draw the elevation and plan of the hexagonal prism.
• Project A'A' & AA from the elevation C'C' shall be equal to 6 x 20 = 120 mm.
1
• On A'A' set of A'1, 1-2, 2-3 etc. equal to the side of the hexagon.

• Through A', 1,2,3 etc, draw vertical lines meet at AA, 1',2',3' etc to complete the required lateral surface devel-
opment of the hexagonal prism.

Fig 3

Exercise 7.4
Draw the development of surfaces of the box. (Fig 4)

Fig 4

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CITS : Engineering Drawing (Mechanical) - Exercise 7