Distance to the top of the bottom bar is 16".
Outside diameter of schedule 40 pipe is 1-11/16".
If copy and paste works, here's the link:
http://jive.ilearning.com/thread.jsp...t=15&trange=15
If you do the math, that would be 16" minus 1-11/16" = 14-5/16".
Regards,
Scott358