Dimension arc length. to control min max arc.

[tighthead]

2005 sp0. When dimensioning points on an arc (rolled UB with holes in flange & cleats around arc, point on arc & hole centre line), most of the time I get the arc length dimension I want. Done by, Click on end point, click on 2nd point then click on arc. Sometimes I get the arc length around the opposite direction to the one I want. How do I control which way the arc goes ?

 

[handleman]

Have you tried making your second point click always counter-clockwise from your first point click? I know the "centerpoint arc" command always goes CCW. Positive angles are CCW in a right-hand coordinate system.

 

[tighthead]

Tried both ways when it does not work? Can't work out why some will work on drawing then it won't?