What are visible lines?
A visible line, or object line is a thick continuous line, used to outline the visible edges or contours of an object. A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen.
What is visible line used for?
1. OBJECT OR VISIBLE LINES – Thick dark line use to show outline of object, visible edges and surfaces.
What is the symbol of hidden line?
Hidden lines indicate invisible edges or contours. Hidden lines consist of short dashes evenly spaced and are frequently referred to as dash lines.
How thick is visible line?
made up of a series of connecting arcs. continuous and the line weight is usually thick (0.5 – 0.6 mm).
Hidden lines show edges of details that are not visible from the point of view shown in the drawing. Center lines define the center of arcs, circles, or symmetrical parts.
A drafter—in deciding whether a line in a view should be represented as hidden or as visible—relies on the fact that in third-angle projection the near side of the object is near the adjacent view, but in first-angle projection the near side of the object is remote from the adjacent view.
Why we draw hidden lines?
Hidden lines are used to show surfaces that are not directly visible. All surfaces must be shown in all views. If an edge or surface is blocked from view by another feature, it is drawn using a hidden line.
What are the visible lines in technical drawing?
Visible lines are the edges or “outlines” of an object. They are drawn as solid lines with a thick/heavy weight. All other lines contrast with the visible lines by having either a thinner weight and/or a combination of dashes. The following chart shows technical drawing lines that describe a piece of machinery with a swinging arm.
A visible line, or object line is a thick continuous line, used to outline the visible edges or contours of an object. A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen.
What kind of lines are used in drawing?
OBJECT OR VISIBLE LINES – Thick dark line use to show outline of object, visible edges and surfaces. 2. CONSTRUCTION LINE – Very light and thin line use to construct layout work. 3.
When do you use a dashed line in a drawing?
The Dashed Line is used to indicate hidden details like hidden outlines and hidden edges. The dashed line may be either thick or thin, but only one type (thick or thin) should be used on a single drawing or set of drawings. Thin Chain Line
