The routine is designed to draw the break symbols on two parallel lines.
To draw the break symbol for the duct going horizontally from the left to the right with break on the right hand side, start with picking point on the duct at lower of the two lines.
Pick the second point right across the duct on the other line. It will snap to perp. from the first point and draw the symbol instantly.
If you want to interrupt the duct with two opposite symbols, hit the enter right after the first symbol is drawn and this time pick the first point at the upper and second on lower line for the symbol to be drawn to the right from the first one. Trim off the duct lines between symbols.
The symbols can be drawn on the duct going in any direction (or angle), even on the arched duct.
If you want, or if this is not clear enough, e-mail me and I can show you graphically how to go about it. It is very simple and fast.
Paul.
paulmcz@yahoo.com