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Chapter 2

Chapter 2. Working Drawing Concepts. Sketching • Orthographic Projections • Dimensioning • Architect’s Scale • Linear Measurement • Symbols and Conventions. Sketches convey ideas graphically and are drawn using basic tools such as pencils, paper, and erasers.

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Chapter 2

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  1. Chapter 2 Working Drawing Concepts Sketching • Orthographic Projections • Dimensioning • Architect’s Scale • Linear Measurement • Symbols and Conventions

  2. Sketches convey ideas graphically and are drawn using basic tools such as pencils, paper, and erasers.

  3. Plane figures are geometric shapes with flat surfaces.

  4. Pictorial drawings show height (H), length (L), and depth (D) in one drawing.

  5. Receding lines of perspective drawings converge to one, two, or three vanishing points.

  6. The isometric axes are drawn 30° above horizontal.

  7. The oblique axis of an oblique drawing is drawn 30° or 45° above horizontal.

  8. The three-view drawing is the most common type of orthographic projection.

  9. Elevation views are related by projection of features from one view to another.

  10. A point on an elevation is shown as a line on the adjacent elevation and vice versa.

  11. An architect’s scale is used to produce scaled drawings.

  12. Most tape measures have highlighted portions indicating feet.

  13. Tape measures and other rulers used in the building trades are often divided into 1/16" increments.

  14. A tape measure can be used by a tradesworker to measure a component and transmit information back to the architect.

  15. Symbols are drawn in proportion to other construction materials.

  16. Arrowheads, slashes, or dots may be used to terminate dimension lines.

  17. Walls are dimensioned to facilitate construction methods.

  18. Partitions are dimensioned to their centerlines or faces.

  19. Openings for windows and doors are dimensioned to their centerlines.

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