This anti-vibration mounting bracket consists of a metal hat channel mounting rail, 2 rubber mounted vibration pads and sound isolation tape on the rail. The rail mounts with 2 screws (not supplied) in each pad into the wall studs or ceiling joists. Length of the rail assembly is 30" to accomodate 16" or 24" studs/joists.
The safe load limit of the each rail is 75 Lbs. Normally, 2 rails are used for the mounting platform item, like pumps, motors, etc, giving you a 150 Lb. useful load hanging inverted like a garage door opener. A buzzing electrical box can usually be mounted with one rail as it has some support from the pipe protecting it's wires. More info on vibration pads is HERE