Prints: The Language of Industry 1 Prints: The Language of Industry
Line Conventions and Lettering 2 Line Conventions and Lettering
Identify the standard alphabet of lines. Describe the types of lines by appearance and purpose. Identify the style of lettering recommended for standard industrial drawings.
Line Conventions A convention is a generally accepted way of doing something A list of line types is used throughout industry to show the conventional practice for industrial prints This list is defined in many references as the alphabet of lines
Alphabet of Lines Most common line types: Visible lines Hidden lines Center lines
Visible Lines
Hidden Lines
Center Lines
Alphabet of Lines Line types used in section views: Section lines Cutting-plane lines Short break lines
Lines Types Used in Section Views
Alphabet of Lines Line types used in dimensioning: Extension lines Dimension lines Leader lines
Lines Types Used in Dimensioning
Alphabet of Lines Additional line types: Break lines Phantom lines Stitch lines Chain lines
Lettering In engineering drawings, the text and numeric information is referred to as lettering Lettering is: Uppercase Vertical structure Single stroke Gothic
What is the alphabet of lines? A list of line types used throughout industry with each line type having a specific form to represent a certain meaning.
Describe in terms of the alphabet of lines the lines that appear in this illustration Visible lines, hidden lines, center lines, phantom lines, section lines, cutting-plane line, viewing-plane line, dimension lines, extension lines, leader lines, and chain line.
Single-stroke, Gothic style, uppercase letters Describe standard lettering as illustrated here Single-stroke, Gothic style, uppercase letters
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