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JSS3: BASIC TECHNOLOGY - 1ST TERM

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  1. Materials & Processing - Timber I | Week 1
    6 Topics
    |
    1 Quiz
  2. Materials & Processing - Timber II | Week 2
    4 Topics
    |
    1 Quiz
  3. Processing of Materials - Metals | Week 3
    5 Topics
    |
    1 Quiz
  4. Processing of Clay, Ceramics and Glass | Week 4
    5 Topics
    |
    1 Quiz
  5. Methods of Producing Plastics & Rubber | Week 5
    2 Topics
    |
    1 Quiz
  6. Drawing Practice - Isometric Drawing | Week 6
    4 Topics
    |
    1 Quiz
  7. Oblique Projection | Week 7
    2 Topics
    |
    1 Quiz
  8. Orthographic Projection | Week 8
    4 Topics
    |
    1 Quiz
  9. Perspective Drawing (One - Point Perspective Drawing) | Week 9
    4 Topics
    |
    1 Quiz



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Topic Content:

  • Angles of Projection
  • Principle Views
  • First Angle Projection
  • Third Angle Projection
First-Angle-Projection and Third angle projection

There are two main methods of orthographic projection as earlier said, they are:

1. First angle projection

2. Third angle projection

The principal views are the front elevation, side (end) elevation, and plan.

Principal Views:

orthographic

Front Elevation:

This is the main view, it is obtained by looking at the given front of the object to be drawn. The front elevation is seen in the vertical plane. The drawing below shows exactly what you would see if you stand directly in front of the L-shape.

Front elevation

End (Side) Elevation:

This is obtained by looking at the given side of the object. The end elevation is also seen in the vertical plane [i.e. auxiliary/side vertical plane (S.V.P)].

 

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