I built this frame 36 years ago when I was 19 using diesel mighty midget arc welder and a fordson super major fitted with a forklift. We used 2nd hand steel and I remember the boss moaning about the cost of it. And the cost of the crane to lift the tank in.i Cannot say I would make it like this now but it's stood for over 30years with 17 tons of water in it so couldn't have been that bad. The tank is rusted through and I've got the job of repairing it.