Jatkeviivat

Jatkeviivat, often translated as "extension lines" or "projection lines" in English, are a fundamental concept in technical drawing and drafting. They are thin lines that extend from the dimensions of an object to indicate the area to which a measurement applies. These lines are crucial for clarity and precision in communicating design specifications.

The primary purpose of jatkeviivat is to prevent clutter and ambiguity within a drawing. By extending the lines of the object, a measurement can be placed clearly outside the object's boundaries without interfering with its visual representation. This allows for easier reading and interpretation of the drawing, especially in complex designs with numerous dimensions.

Jatkeviivat are typically drawn as continuous, thin lines, distinct from the object lines and dimension lines themselves. They usually extend slightly beyond the dimension line, creating a small gap that further separates them from the measurement. The length of the extension is standardized to ensure consistency across different drawings. Proper use of jatkeviivat contributes significantly to the overall professionalism and readability of technical documentation. They are an indispensable tool in fields such as engineering, architecture, and manufacturing.