4300 Gallon Plywood Build (3600+ Take 2)

Actually ribbing and top ring were never used and not needed. They stated using them later in the 70's to allow people to lift themselves out of the pool or siting on the top without causing a fold which the water pressure will accommodate from the side provided it is initiated first by a fat guy becasue the water actually holds the sheet metal belt perfectly round and strait.

Just like a tall flimsy round plastic trash can can hold 50 gallons without deforming indefinitely. But yes if you push down on the top rim water pressure will accommodate a collapse. Why they have the vertical supports on a pool which have no lateral support whatsoever and top ring is to support people not water.
 
agreed! my childhood friend used to have a 15' wide round pool that had not top rim, all it had was a steel belt, and a band that went around the top to hold the liner in. the water pressure kept it in shape. if you tried to get out anywhere other than the ladder it would collasp.
 
Licensed carpenter, no. I did work as a framer for a little more than five years. Loved the work. Hated the splinters! When my boss told me to "Put some more wood under that", I did. One good infection from salt treated lumber and a close call while installing trusses, I chose to move on.

Please don't get me wrong. I think this is one of the coolest things i have seen someone do to their home. And the enjoyment you will get from this tank is far beyond my comprehension. Please don't take my input as an attack.

My point is that inch pounds and foot pounds are not legitimate arguments when you are talking about a 24" span. A simple suggestion would be to fill those holes with more stacked 2x6's so that your foundation supports the full load. I've seen 10" footers move with time. (Granted, in Delaware we are floating everything in very sandy soil close to the water table) It's just insurance. The cost in wood would be a drop in the bucket compared to what you already have. 20 tons is nothing to turn your nose up to.

Best of luck. Keep it real.
 
The plywood is glued and screwed down, so there's no pulling it up without destroying it. Not something I'm going to do. If Ken buys into your argument, I'll consider putting 3 more sheets of plywood on the floor, but I don't think he will.
 
Ken and I were able to get a lot done on the tank yesterday. The wave guard, braces, and viewing window back frame. We decided against putting the false wall in on the french door side since it would create seal in moisture from condensation. We also removed the attic stairs and worked on some of the electrical.
 
I like pics:huh: :popcorn:
 
sheesh nola no time for slacking we wanna see OUR tank done already hop to it lol....



kidding keep up the great work
 
aquanooby you're more than welcome to hop a flight and come on down and work on OUR tank. Feel free to order the 15 gallons of Pond Coat we need too. Permadri has my address already, so you can have them drop ship it here. :D
 
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