I've got my aluminum 12" TCT hanging from the main ceiling joist with an eye bolt and some 250-pound test chain. So long as you don't bump it, it stays put.
- Andrew
One thousand and done. Come find me (and everybody else) at Highway Divides!
Got my 12-8-8-12 Econo hanging from a bicycle hook screwed into a ceiling joist. Has been there for at least a year or so. Same hook has been used for other signal heads over the years - first installed in 2004.