Correct dimensioning for symmetrical parts

Hi all,

We have an in-house drafting standard for dimensioning features that
are symmetrical about a center line. The standard was developed in our
AutoCAD days, and is difficult to apply in the new world of SolidWorks
drawings.

I've been trying to determine a better way to do it, preferably
something in line with drafting standards like Y15.5M.

Would some of you drawing gurus mind looking at the two page PDF I've
created and offering some feedback? The file is at:

http://shorterlink.co.uk/5987

Thanks.

 

Here is the section from 14.5 detailing how to show symmetry. Although it
seems to pertain more to partial views.


1.8.8 Symmetrical Outlines. Symmetrical outlines
may be dimensioned on one side of the center
line of symmetry. Such is the case where, due to the
size of the part or space limitations, only part of the
outline can be conveniently shown. See Fig. 1-33.
One-half the outline of the symmehical shape is
shown and symmetry is indicated by applying symbols
for part symmetry to the center line. See ASME
Y14.2M
..
and from y14.2M


2.7 Symmetry Line
Symmetry lines are used as an axis of symmetry for a
partial view. The line of symmetry is identified by two
short parallel lines drawn at right angles through a
center line near each end (see Fig. 1).
Symmetry lines are used when representing partially
drawn views and partial sections of symmetrical parts
(see Fig. 3). Symmetrical view visible and hidden lines
may extend past the center line if clarity would be
improved.