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PowerPoint ® Presentation Chapter 2 Working Drawing Concepts Sketching Orthographic Projections Dimensioning Architects Scale Linear Measurement Symbols and Conventions

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

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Chapter 2 Working Drawing Concepts Plane figures are geometric shapes with flat surfaces.

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Chapter 2 Working Drawing Concepts Pictorial drawings show height (H), length (L), and depth (D) in one drawing.

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Chapter 2 Working Drawing Concepts Receding lines of perspective drawings converge to one, two, or three vanishing points.

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Chapter 2 Working Drawing Concepts The isometric axes are drawn 30° above horizontal.

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Chapter 2 Working Drawing Concepts The oblique axis of an oblique drawing is drawn 30° or 45° above horizontal.

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Chapter 2 Working Drawing Concepts The three-view drawing is the most common type of orthographic projection.

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Chapter 2 Working Drawing Concepts Elevation views are related by projection of features from one view to another.

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Chapter 2 Working Drawing Concepts A point on an elevation is shown as a line on the adjacent elevation and vice versa.

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Chapter 2 Working Drawing Concepts An architects scale is used to produce scaled drawings.

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Chapter 2 Working Drawing Concepts Most tape measures have highlighted portions indicating feet.

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Chapter 2 Working Drawing Concepts Tape measures and other rulers used in the building trades are often divided into 1/16" increments.

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Chapter 2 Working Drawing Concepts A tape measure can be used by a tradesworker to measure a component and transmit information back to the architect.

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Chapter 2 Working Drawing Concepts Symbols are drawn in proportion to other construction materials.

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Chapter 2 Working Drawing Concepts Arrowheads, slashes, or dots may be used to terminate dimension lines.

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Chapter 2 Working Drawing Concepts Walls are dimensioned to facilitate construction methods.

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Chapter 2 Working Drawing Concepts Partitions are dimensioned to their centerlines or faces.

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Chapter 2 Working Drawing Concepts Openings for windows and doors are dimensioned to their centerlines.

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