The above trussing system is actually the LTS-50T system. Here is the
Dura Truss System. And here is a like to
Global Truss .
I do not recommend the use of duct tape to support lighting fixtures, as it is very unsafe.
Lighting clamps for intelligent fixtures are usually capable of supporting the fixture on some sort of hanging position only. This is the ideal position, and safest way to support them, as well as saftey them (so in the event a clamp fails, the fixture will not swing down...also very dangerous).
About clamps: not all lighting clamps are the same. You need to check weight ratings as well as inspect them for overall strength, application, and capability. For instance, cheaper clamps for par cans are by no means suitable for heavier intelligent fixtures. A heavier-duty clamp is required to secure them appropriately.
Better clamps allow for more flexibility in hanging orientation/position. I do not like using anything over 45 degrees from the vertical in an underhang, and only a complete vertical (with yoke inversion) on a top mount (maybe even slighting back into the truss to be sure that the fixture will not swing forward in the event of a clamp failure).
I hope this helps some.
Best,
-Tech
