Linear dimension annotation

[junderwood]

I need to show the horizontal linear dimensions between the center of the blue lines shown in the photo and Column Line N7.  I have figured out the angular dimension, but as we all know, the man in the field isn't going to use that.  He will need the linear dimensions.  Once I select the column line, or the center of the duct bank, I am not able to select any other lines on screen.  Presumably because they are not parallel to each other.  Please advise.  Thanks.

[ToanDN · Accepted solution]

You may need to add a few reference planes to define the linear dimension references.

[junderwood]

That worked like a champ.  Thanks.