Thanks for the response. I'll find out this information as its in a location that is a plane flight away, but I understand they are fixed flat to the ceiling structure, mesh is not used, 5 WLANs at a maximum and the assumption was to have the racks full of fluid storage, back to back racks. Building is 170m Wide (2 buildings with a central breezeway), 176m long and 15m high, There are some well insulated and thick walled areas for cool storage, food grade warehousing and haz chem (hence 2 buildings). I certainly dont profess to be even a WiFi design novice, and your input would be most appreciated. I'm trying to get a license for the Ruckus design and heat map software so i can try to get to the site and walk it to get a live heat map