What type of line is used to show where a section is to be taken?
CUTTING PLANE LINE – Extra thick lines use to show cutaway views or plane of projection where a section view is taken. Arrow indicates the direction of view. 8. SHORT AND LONG BREAK LINES –Short and long medium line use to show cutaway view of a long section.
What type of line is used to represent a surface which is obscured by another part of the object?
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 type of line shows an alternative position of an object or device?
Phantom lines indicate the alternate position of parts of the object or the relative position of a missing part. They are composed of one long and two short evenly spaced dashes.
What does a section line on a drawing show?
A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The cut line is called a “cutting plane”, and can be done in several ways.
What symbol is used to indicate the plane where you cut an object?
The cutting plane appears edgewise as a thick dashed line called the cutting-plane line. The arrows at the ends of the cutting-plane line indicate the direction of sight for the sectional view.
What are the line symbols?
Line symbols are used to draw linear features and graphics in maps, scenes and layouts. Line symbols, like all symbol types, are composed of symbol layers. Line symbols typically contain one or more stroke symbol layers.
What is a section view?
A sectional view or a section looks inside an object. Sections are used to clarify the interior construction of a part that cannot be clearly described by hidden lines in exterior views. By taking an imaginary cut through the object and removing a portion, the inside features may be seen more clearly.
What is the purpose of a removed section view?
Just like any other view, Removed Sections provide the ability to break alignment, should you need to move the view to another area or show it in a different orientation. In the picture below, the removed section views have been aligned horizontally.
When and why is a section view necessary?
In which case, the direction of sight is towards one half of the object. The other half is then mentally discarded. Drafters use sectional views to improve the clarity of complex objects when internal surfaces result in too many hidden lines. Special conventions are used to make a sectional view easy to understand.
What is a section that looks inside an object?
A sectional view or a section looks inside an object. Sections are used to clarify the interior construction of a part that can not be clearly described by hidden lines in exterior views. By taking an imaginary cut through the object and removing a portion, the inside features may be seen more clearly.
Why is a hole on an object not given section lines?
Notice that the square hole in the object has no section lining, since it was not changed by sectioning. Section lines are very light. When sketching an object or part that requires a sectional view, they are drawn by eye at an angle of approximately 45 degrees, and are spaced about 1/8” apart.
At what angle are the section lines hatched usually drawn?
45-degree angle
Can you dimension a section view?
Dimensioning the interior features would require dimensioning to hidden lines which is poor practiced. The problem is eliminated by creating a sectional view which shows the interior details. Once this view has been created, you can dimension the interior details in the sectional view to complete the drawing.