2011

Create Radial Dimensions
Radial dimensions measure the radii and diameters of arcs and circles with
optional centerlines or a center mark.
There are two types of radial dimensions:
■ DIMRADIUS measures the radius of an arc or circle, and displays the
dimension text with the letter R in front of it.
■ DIMDIAMETER measures the diameter of an arc or circle, and displays the
dimension text with the diameter symbol in front of it.
For horizontal dimension text, if the angle of the radial dimension line is
greater than 15 degrees from horizontal, a hook line, also called a dogleg or
landing, one arrowhead long, is created next to the dimension text.
Control Extension Lines
When an arc is dimensioned, the radial or diametric dimension does not have
to be positioned along the arc directly. If a dimension is positioned past the
end of an arc, either an extension line will be drawn that follows the path of
the arc being dimensioned or no extension line will be drawn. When the
extension line is suppressed (off), the dimension line of the radial or diametric
dimension is drawn through the center point of the arc instead of to the
extension line.
1010 | Chapter 27 Dimensions and Tolerances