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Sketching Applications

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Presentation on theme: "Sketching Applications"— Presentation transcript:

1 Sketching Applications
Chapter 5 Sketching Applications

2 Why Sketching? Sketching (i.e., freehand drawing)
Drawing without drafting equipment Only paper, pencil, and an eraser needed Fast, visual communication Asset for communicating technical concepts All lines are related in sketches Size and direction Sketches should be proportional Actual size depends on paper and sketch size

3 Sketching Tools & Materials
Soft lead pencil Initially type of paper is not critical as long as the idea can be conveyed Grid paper is best to define scale

4 Sketching Tools and Materials
Pencils Should have soft lead Common No. 2 Mechanical pencil with H, F, or HB lead Automatic 0.7-mm or 0.9-mm pencil with F or HB lead Point should be slightly rounded Paper Almost any type works

5 Sketching Straight Lines

6 Sketching Circular Objects
Trammel Method Make a trammel or use scale Place pencil on one point while holding the end and rotate around center point Nail and string method Hand compass Method Use your hand as the center and rotate the paper How did you do? Practice Sketch freehand

7 Measurement and Proportion
Proportion of lines to each other are more important then the size of the sketch itself The first line sketched determines the ______of the drawing The second line determines the ______ of the drawing Use your pencil to establish measurements if no scale is available

8 Sketching Procedures Use Construction Lines Box out drawings
Before sketching try to visualize the object or finished product Sketch very light lines of the outline Add details being careful to keep the proportion correct Darken in the desired lines of the final sketch Use a grid to create irregular shapes Use Construction Lines Box out drawings

9 Multiview Projection Establishes two or more views of an object as projected on two or more planes Uses orthographic projection techniques Elevations Two-dimensional exterior views of a structure Proper view selection Six primary views



12 Multiview Details Use the front, left side, right side, and back as elevations Where do all drawings come from? Floor Plans Roof Plan Cross Section Electrical Site


14 ________________ or _______________Sketches ____________ = 90º
Mirror Line Height Width

15 Practical Application of Orthographic Projection
Any projection of features onto an imaginary perpendicular plane Lines of sight are perpendicular to the plane Objects are true size if they are parallel to the plane Objects are foreshortened if they are not parallel to the plane Alignment of views is critical

16 Application Exercise

17 One and Two Point ___________Projection Sketches
Determine best view for the front Set up isometric axes Sketch overall block Add details

18 Setting up Sketches Perspective Isometric Vanishing point(s)
Horizon Line Ground Line Isometric Horizontal ground line Perpendicular line Two 30° lines

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