I was just going to get to that earthquake issue and I see Mxslick's post... Anyway to the best of my current knowledge, none of the many I have hung up in ceilings came down during the recent very discernable earthquake we had. I have done some in Kona too, by the way on the Big Island and it got jolted really good. I like using long struts suspended across the top of two structural beams with hanging rods down to the struts supporting my xfmrs. Beam Clamps just seem to me to be less secure.
