6. Long dash line—For dimension lines. Same width as 1.
7. Dot-and-dash line—For center lines and section lines. Same width as 1.
When there is not room for the figures that represent dimensions, the arrow heads may be turned in the direction of the measurement and placed outside. The figure, too, may be placed outside if necessary.
Nothing but the letters, the figures and the barbs—not the shafts—of the arrow are drawn free-hand.
Sometimes, it is desirable to have one dimension shorter than the scale selected would allow; this is done by means of a broken view: [Fig. 4]. The figured dimension prevents confusion.
Fig. 5.
Fig. 4.
