Lines used in Dimensioning
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| Baseline Dimension | A method of dimensioning in which several dimensions originate from a common surface, center line, or center plane.
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| Continue Dimension | A method of dimensioning in which dimensions appear in a line from one feature to the next
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| Leader | thin, solid line directing attention to a note or dimension and starting with an arrowhead or dot.
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| Extension Line | is a thin, dark, solid line that extends from a point on the drawing to which a dimension refers
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| Dimension Line | is a thin, dark, solid line terminated by an arrowhead, indicating the direction and extent of a dimension.
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| Dimension Text | text using decimal-inch or metric values
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| Arrowhead | dimension line and leader terminators
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| Diameter Dimension | dimensions a circle
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| Radius Dimension | dimensions an arc
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| Gap | 1/16" should be left where extension line would join the object outline.
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| Dimension Text Height | The ASME standard recommends a .12″(3mm) text height.
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| Dimension Line Spacing | ASME standards recommend a minimum spacing of .375″(10mm) from a drawing feature to the first dimension line and a minimum spacing of .25″(6mm) between dimension lines.
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| Center mark | are used to show and locate the centers of circular features.
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| Dimension | A description of the size, shape ,or location of features on an object or structure.
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