I built our dock using steel pontoons, cut in half and welded shut. It was a LONG two days here in the shop welding, pressurizing, and testing for leaks with soapy water. I sealed the outside with epoxy, so far so good. Three years in and still floating.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.