We were cleaning out the shop at The Permian Playhouse of Odessa , a comunity theater were I doing lighting designs for alot shows. We found these and I was going to ask the same question, What Are They? They look like some sort of support beam.
:) I think automated flysystems are the way of the future! Wish I could use one on a Daily Bases. It gets kida frusterating having to pull something up down 25 million times just to find out that it is wrong. Example:Light Bar or Electrical