Engineering Drawing - Chapter 1

Engineering Drawing

Chapter 1: Drawing Instruments

1. Drawing Board:
Made from strips of well-seasoned soft wood, generally 25 mm thick. One of the shorter edges of the rectangular board is provided with a perfectly straight ebony edge, known as the working edge, on which the T-square is moved while making drawings.

Drawing Board
Figure 1: Standard Drawing Board
Note: Battens are provided at the bottom to avoid warping of the board.

Materials Used:
Good quality wood such as pine, fir, oak, or linoleum.

Sizes of Drawing Board

Designation Size (mm) Name of Board
BO 1500 x 1000 x 25 Antiquarian
B1 1000 x 700 x 25 Double Elephant
B2 700 x 500 x 15 Imperial
B3 500 x 350 x 15 Half Imperial
T-Square
Figure 2: T-Square used with Drawing Board
Drawing Instruments
Figure 3: Common Drawing Instruments

(Source: Wikipedia)

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