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Alphabet Of Lines

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Alphabet Of Lines Understanding the basic types of lines used on an orthographic drawing. Written by Sony Gala Alphabet of Lines 6 Basic Line Types Visible Hidden ... – PowerPoint PPT presentation

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Title: Alphabet Of Lines


1
Alphabet Of Lines
  • Understanding the basic types of lines used on an
    orthographic drawing.

Written by Sony Gala
2
Alphabet of Lines
The Alphabet of lines is used by the designer and
the drafter. The drafter uses the alphabet of
lines to convey information to the designer who
will then construct or manufacture the product.
Many times that drafter and designer never speak
to one another. All information is communicated
to the designer by the draftsman through the
drawings.
3
6 Basic Line Types
  • Visible
  • Hidden
  • Center
  • Dimension
  • Extension
  • Leader

There are additional lines in the Alphabet of
lines that we will not concentrate on at this
time. They include Section, Cutting Plane,
Phantom, Viewing Plane and Break.
4
Visible Lines
  • Dark, heavy lines.
  • Show the outline and shape of an object.
  • Define features you can see in a particular view.

5
Hidden Lines
  • Light, narrow, short, dashed lines.
  • Shows the outline of a feature that can not be
    seen in a particular view.
  • Used to help clarify a feature, but can be
    omitted if they clutter a drawing.

6
Center Lines
  • Thin line consisting of long and short dashes.
  • Shows the center of holes, slots, paths of
    rotation, and symmetrical objects.

7
Dimension Lines
  • Dark, heavy lines.
  • Show the length, width, and height of the
    features of an object.
  • Terminated with arrowheads at the ends.

8
Extension Lines
  • Used to show the starting and stopping points of
    a dimension.
  • Must have at least a 1/16th space between the
    object and the extension line.

9
Leader Lines
  • Thin lines.
  • Used to show the dimension of a feature or a note
    that is too large to be placed beside the feature
    itself.

10
Summary
  • Now that we have discussed the 6 basic line
    types, you should be able to do the following
  • 1. Identify the alphabet of lines.
  • 2. Identify where the line types are
    used.
  • 3. Produce the lines on a drawing or
    sketch
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