A follow up to this question: Running Coax cable to the upper floor
If I cut a hole in the ceiling of my dining room and then another in the floor so I can run a conduit from the upstairs all the way to the basement, what should I use to secure the top and bottom of the conduit so it doesn't just fall through to the basement!
I need some kind of clamp (or maybe a bushing?) that will secure the conduit at the top (either on the ceiling of the dining room or the floor of the attic) and then again either at the floor of the dining room or the ceiling of the basement. I know I can clamp it to the wall (assuming I can find the stud), but it still seems like I should secure the top and bottom or else it could slide vertically out.