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# ALPHABET OF LINES

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## Cameron Dennis

on 15 May 2014

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#### Transcript of ALPHABET OF LINES

CONSTRUCTION AND GUIDE LINES
Construction Lines are drawn very lightly and are used to block in drawings and as guidelines for lettering. They are one of the few lines that can be erased in an architectural drawing.
BORDER LINE
Border lines are the heaviest weight line used in drafting. It varies from 1/32in. to 1/16in. depending upon the size of the drawing sheet.
EXTENSION LINE
The Extension Line is the same weight as the dimension line. It extends the dimension beyond the outline of the view so that the dimension can be read easily. The line start about 1/16 in. beyond the object and extends about 1/8 in. past the last dimension line.
DIMENSION LINE
The Dimension Line is usually capped at each end with arrowheads and is placed between two extension lines. With few exceptions it is broken with the dimension placed at midpoint between the arrowheads (the number is in the middle basically). The dimension line is a light line a bit heavier than the construction line. It is placed 1/4 to 1/2 in. away from the drawing.
ALPHABET OF LINES
The Alphabet of Lines is an outline used on an architectural sketch that let the drafter to connect ideas clearly and correctly.
VISIBLE OBJECT LINE
The Visible Object Line (also "visible line") is used to outline the visible edges of the object being drawn. They should and usually are drawn so that the views stand out visibly on the drawing.
ALPHABET OF LINES
HIDDEN OBJECT LINE
Hidden Object Line(also called Hidden Line)is used to show the hidden features of the object. It is drawn the same weight as the Visible Object Line and is composed of short lines approximately 1/8in. long separated by spaces approximately 1/16in. They may vary slightly according to the size of the drawing. Hidden object lines should always start and end with a dash in contact with the visible object line.
CENTER LINE
The Center Line is used to indicate the center of symmetrical objects. It is a fine dark line composed of alternate long (3/4 in.) and short (1/8 in.) dashes with 1/16 in. spaces between dashes. The center line should extend uniformly only a short distance beyond the circle or view. They start and end with long dashes and should not cross at the spaces between the dashes.
CUTTING PLANE LINE
The Cutting Plane Line is a heavy line. It is used to indicate where the sectional view will be taken. Two forms are recommended for general use. The first form is composed of a series of long (3/4 to 1 1/2 in.) and short (1/8 in. with 1/16 in. space) dashes. The second form is composed of equal about 1/4 in. long with 1/16 in spacing.
SECTION LINE
Sectional Lines are used when drawing the inside features of the object. They indicate material cut by the cutting plane line, and also indicate the general classification of the material. The lines are fine dark lines.
PHANTOM LINE
The Phantom Line is used to indicate alternate positions of moving parts and for repeated detail threads and springs. It is a thin dark line made of long dashes (3/4 to 1 1/2 in.) long, alternated with pairs of short dashes 1/8 in. in length, with 1/16 in. spaces.
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5 1/2
Review!
1. What is a Border Line?

2. What is a Visible Object Line?

3. When is a Border Line used?

4. What purpose do architectural lines serve?
1. A Border Line is the thickest line in the alphabet of lines and is used to outline the 'border' of a draft.

2. A visible object line is a line that indicates the presence of an object that is visible from a certain view.

3. A Border Line is usually used in every draft.

4. Architectural Lines aid engineers in visualizing the finished project being created in a draft.
What we'll be learning!
Identify the different types of lines.
How to use these lines and when to use them.
What tools to use when drafting.
How to use those tools.
vocabulary
Alphabet of Lines
Hidden Lines
Guide Lines
Phantom Lines
Center Lines
Extension Lines
Border Lines
Dimension Lines
Full transcript