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Chapter 11
1. Correct Woodshop Map
2. Homework Check
3. Drafting (Workbook p. 177)
4. Projections (Workbook p. 181)
Basic lines used in drafting are…
…lines whose appearance and meaning are determined by international agreements.
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.
Example Name Thickness Meaning
- - - - - - Hidden Line
Broken Line
Indicates the
outlines that are
not visible in the
current view
Example Name Thickness Meaning
____ _ ____ Centre lineSmall
dash in centre.
Indicates the centre of a circle.
Example Name Thickness Meaning
Cutting plane line
Includes arrow
heads at each end.
Indicates the
placement of an
imaginary cut.
Example Name Thickness Meaning
Dimension line
Includes arrow
heads at each end.
Indicates the length
of an object.
2.75
Example Name Thickness Meaning
////// HatchingSlanted,Equally spaced.
Indicates the surface where an imaginary
cut has produced a
sectional view.
Example Name Thickness Meaning
Leader line.
Has an angle of 30, 45 or
60 degrees.
Ties a dimension
to a particular feature.
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