Indoors. All LED. Think heat is a concern still? Positions designed well enough and otherwise built corectly that roostering and side arms would be rarely needed. Compatible clamps already being provided. I just thought the sleeves might make the use easier - less running of the bolts.
The last theater I worked on, the GC inadvertently over-sized the hanging pipes in the main lobby's coat check. (He went with 2" ID schedule 40, approximately 2-3/8" O.D.) It was welded and ground in place before the problem was discovered then someone sourced coat hangers with over-sized hanging hooks. It was definitely more than capable of holding up heavy, wet, Canadian winter-wear.I'm curious:
Would lighting-batten pipe diameter not be a "critical" dimension, and so marked on a construction print?
Could one expect an installation GC to respect dimensions so marked? Or not?
Tell us what you really think Mike!-Grounding is not required by the clamp; your cable should probably do that. If you think otherwise, you need to go back to school.
-ETC supplied crap clamps will tighten down on much smaller pipes, but they are crap.
-C-clamps are garbage and should not be used anyway.
-you cannot use amps on my truss..okay you can, just give me a $1000 deposit per stick of truss.
-PVC "truss condoms" Are for people who are too cheap to buy the right clamps.
-If you are doing a theater tour and only have c-clamps, just say so and I will bring you Half couplers to use for free... just to save my truss.
-Grounding is not required by the clamp; your cable should probably do that. If you think otherwise, you need to go back to school.
Well, in the high schools I've worked in, I've run across plenty of poorly wired stagepins where the ground wire is the first to come loose. That means the body of the fixture would no longer be grounded if the clamp was insulated from the batten by PVC. Any further failure could easily result in the body of the fixture being energized without tripping any breakers.
So, you're absolutely right that the cable should provide a protective ground, but in school I learned that having a single point of failure is never the best design
This is good to keep in mind. Ran into this a handful of times while touring out of the country. There was a ground bond for the truss system. More than once, it turned out the ground wasn't properly connected at the venue's panels; tied to neutral instead or not connected at all or not a good enough ground connection. With the state of equipment on the truss, mainly the old S4 pars, there was almost always some voltage energizing the truss. Normally not a problem when the ground was good, but if it wasn't, there was a tingling sensation when you touched the truss. When running on generators, it could sometimes be an issue as well.
If the contractor is either so sensitive that making him correct the problem of his creation will cause him to cry, pout or otherwise ruin his day; or if he is sufficiently petty and vindictive as to sabotage other aspects of construction, you have more issues that the size of pipe.
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