Gentlemen
Can any of you provide me with any known statutes concerning safety and engineering requirements for doing an install that includes speaker flying. Having a discussion where the question has been asked "show me where it says that"
I think leave gave some good advice. If you are hanging an 80lb speaker I doubt you will need a structural study. You do however want a competent installer familiar with all local codes (seismic for your area was a good call).
Frankly, if you don't do it every day, and I don't care if you are an engineer, electrician, carpenter it doesn't matter. Let a pro do it.
My guys get wanked at me for giving profit away. I look at it as shedding liability. We won't install speakers under any circumstances, it's not what we do.
I'm not telling you what to do, just sharing my experience.
If you are hanging over 200 lbs. I would have a structural engineer (a real PE with a seal) and a set of drawings done. Also check with your insurance company and or leaseholder. You may find an attachment clause.
Of course you don't want to be this guy (extreme example)
http://www.boston.com/news/world/europe/2014/04/25/italian-man-killed-giant-falling-crucifix-dedicated-pope-john-paul/hhdrIgQc88q7LarpdEiaIP/story.html