Really? Wow, must be a cya thing. Im guessing someone had one tip over on them and they got sued. Common sense will tell you that all that reciprocating motion is going to cause fatigue and cracks eventually. I have my vertical sitting on pads not bolted down. Its perfectly stable and is extremely quiet. In my case it couldnt fall over if it wanted to....not enough room in the building its in.
I dont care what quincy says, I wouldnt bolt a vertical tank down solid.
