Chapter 11 1.Correct Woodshop Map 2.Homework Check 3.Drafting (Workbook p. 177) 4.Projections (Workbook p. 181)
Workbook p. 177 Textbook p. 337
Definitions
Technical Drawings are used… …in technology to communicate information about an object or a system.
Basic lines used in drafting are… …lines whose appearance and meaning are determined by international agreements.
p. 338
Geometric lines are… Are figures that are composed according to the rules of geometry, the art of drafting lines and curves with a ruler and a compass.
A sketch… Is a freehand drawing that respects, as much as possible, the conventions of drafting.
Basic Lines
ExampleNameThicknessMeaning Visible LineThick Indicates the visible outlines of an object.
Hidden Line
ExampleNameThicknessMeaning Hidden Line Broken Line Indicates the outlines that are not visible in the current view
Hidden Line
ExampleNameThicknessMeaning Construction line Fine Used in preliminary sketches.
Hidden Line
ExampleNameThicknessMeaning ____ _ ____ Centre line Small dash in centre. Indicates the centre of a circle.
Hidden Line
ExampleNameThicknessMeaning Cutting plane line Includes arrow heads at each end. Indicates the placement of an imaginary cut.
Hidden Line
ExampleNameThicknessMeaning Dimension line Includes arrow heads at each end. Indicates the length of an object. 2.75
Hidden Line
ExampleNameThicknessMeaning Extension line. Fine Indicates the boundaries of a measurement.
Hidden Line
ExampleNameThicknessMeaning ////// Hatching Slanted, Equally spaced. Indicates the surface where an imaginary cut has produced a sectional view.
Hidden Line
ExampleNameThicknessMeaning Leader line. Has an angle of 30, 45 or 60 degrees. Ties a dimension to a particular feature.
Hidden Line
Homework pp
Creating Figures Using Geometric Lines Goal: To practice techniques for creating various types of geometric lines by constructing and reproducing figures
Order of Operations 1.Get a handout 2.Get drafting tools 3.Complete figure A together as a class 4.Complete figure B individually
Drafting Tools SHARP pencil Ruler Drafting Paper Square Protractor
Figure A Follow steps # 1-8
Step # 1
Step # 2
Step # 3
Step # 4
Step # 5
Step # 6
Step # 7
Step # 8
Figure B Reproduce 1:1