I normally use "spring nuts" for installs with grade 8 bolts, etc. The strut is perfectly capable of holding the weight. A static load is one thing-a dynamic load presents a whole different set of forces that need to be dealt with and considered.ĭuane Massey wrote on Tue, 28 December 2010 10:50 The one thing to ALWAYS remember is when flying something, You are only as good as your WEAKEST member-be it a anchor (usually where the problem is) or a connection/crimp or threaded rod/cable etc. You may consider additional bracing to keep it stable. This could over time weaken the anchor in the concrete or loosen the hardware. Edit: Also, if it is just suspended along it's length with the threaded rod, keep in mind that a moving light may cause it to sway back and forth like a trapeze. It can be hard to get a good anchor in a concrete ceiling so you should make sure that's all up to snuff. I think the biggest factor is making sure it is anchored and suspended properly. Most Unistrut is load rated and the details are available on the manufacturer's websIte much in the same way truss is. Tom Manchester wrote on Fri, 24 December 2010 00:27
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