About the Assault Trooper's Beacon

I believe it is more than just within the map boundaries and outside of a jammed area to deploy, I am noticing that the space for the beacon has to include space around it and placed in an area at least tall enough where people can spawn on it. That includes certain debris that alters how the beacon stands or counts against the seemingly height rule for placement. Think Cairo Bazaar, as an example, where the line of destroyed and tilted buildings, creates areas that appear to be tall enough but the beacon will not place. Space around and above is all I can come up with.