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Topic 2: Lines and Shapes

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Presentation on theme: "Topic 2: Lines and Shapes"— Presentation transcript:

1 Topic 2: Lines and Shapes
Technical Drawing Topic 2: Lines and Shapes

2 Topic 2: Lines A draftsman uses many different kinds of lines. Each kind of line has a different meaning. The different line types we use are also industry standards.

3 Topic 2: Lines Line types: Visible Edge Invisible Edge (Hidden Lines)
Center Lines Projection Lines Dimension Lines

4 Topic 2: Lines Visible Edge Lines:
Edges of an object which you can see when you look at the object. They are drawn with solid lines are darker pencil lines and medium thickness

5 Topic 2: Lines Invisible Edge (Hidden Lines):
Edges of an object which you cannot see when you look at the object. They are drawn with short dashes and are always light pencil lines and thin lines.

6 Topic 2: Lines Center Lines:
Are used to show the centers of circles and round objects. They are drawn with long dashes alternating with short dashes and are always light and thin lines.

7 Topic 2: Lines Projection Lines:
Are used to connect parts of one view of an object with corresponding parts of another view of that object. They are drawn with long dashes and very light lines.

8 Topic 2: Lines Dimension Lines:
Are used with figures (numbers) and arrowheads to show the sizes of an object. They are always drawn with light thin lines.


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