Board Practice And Scale Drawing JSS1 Basic Technology Lesson Note

BOARD PRACTICES AND SCALE DRAWING

CONTENT

•             Definition of board practice
•             Setting up the board
•             Drawing of lines
•             Positioning of the title block

DEFINITION OF BOARD PRACTICE

Board practice is the act of learning how to use drawing instruments on a drawing board to draw vertical, horizontal, incline lines, etc., to display good board practice, it is necessary to use the appropriate drawing instruments which includes the following: 1. Drawing board 2. Tee-square 3. Set-square 4. Pair of compasses 5.Divider 6.Protractor 7. HB, 2H pencil 8. Eraser

SETTING UP THE BOARD

Step 1 Place the drawing board conveniently on the table with the square edge to the left-hand side.

Step 2 Place the drawing paper on the board, leaving equal space all around.

Step 3 Place the tee-square on the paper, and gently slide or move the tee-square to the top edge of the paper.

Step 4 Set the top edge of the paper parallel to the edge of the tee-square, with the stock of the tee-square firmly against the edge of the drawing board on the left-hand side.

Step 5. Gently slide the tee square down without moving the paper.

Step 6 Cut pieces of adhesive tape to hold the paper in position, and place them over the four corners of the paper.

EVALUATION

1.         Define board practice.

Mention the steps involved in setting up the board.

DRAWING OF LINES

All horizontal lines are drawn with the aid of a tee-square, usually from left to right, and rotating the pencil as the line is drawn. This ensures a uniform thickness of the line.

The set-square is used sitting on the tee-square to draw upright or vertical lines on the paper. Angled lines are also drawn with the set square turned in different directions.

POSITIONING OF TITLE BLOCK

The title block is at the bottom right-hand corner of the drawing and consists of the following information (a) Title of Drawing (b) Name of object (c) School (d) Scale (e) Date

The title block should be lettered free-hand in single-stroke capitals. The two types of lettering are vertical and inclined. Only one method of lettering should be used.

 EVALUATION

1.         How can horizontal and vertical lines be drawn?
2.         List the information required in the title block.