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  1. CostalGuy

    Diving Tank

    I am in the middle of both sides of the argument: In a perfect world, without weakening of the plastics due to deterioration or abrasion; 1) The deformations from filling/emptieing will be present on a 'discontinuous' assembly material such as I am proposing. However by introducing similar...
  2. CostalGuy

    Diving Tank

    elastrometric is a new word for me! I would consider an un-reinforced connection to be elastic, however, I am planning on reinforcing the openings with fiberglass and now anticipate making a fiberglass frame for the windows not as well. this is the whole reason that I am bringing this concept...
  3. CostalGuy

    Diving Tank

    I had anticipated just pushing it into position, 1/4" thick lexan is pliable enough to match the circumference of the tank. Being on the inside of the tank, the hydrostatic pressure should form the curve as well when filled. By reinforcing the window openings I am hoping to have the stiffness...
  4. CostalGuy

    Diving Tank

    I would think that having half of the tank as a window would be more than ample for the intended use. Also, half of the tank will be obstructed with the access stairs. I think that by reinforcing the cut edges with fiberglass that it should stiffen the tank significantly and by replacing the...
  5. CostalGuy

    Diving Tank

    Thank you all for the continued feedback; to answer questions/interject my own thoughts: 1) Yes the proposed loading is minimal so evaluating at 5 psi should cover the fudge factor. with that, the tank will have enough rigidity to it and I will reinforce the openings to add stiffness to it 2)...
  6. CostalGuy

    Diving Tank

    I appreciate the input, a lot of good ideas that I will incorporate; Analyzing as a slip critical connection is a good idea, roughening/cleaning the faying surfaces is a great idea as well as using appropriate epoxy. Fender washers will be a must too. The stress concentrations at the square...
  7. CostalGuy

    Diving Tank

    here is an image of the actual tank, the blue is an outline of a 3'x3' window. Tank is 5'-4" in diameter, and 7' tall to the dome
  8. CostalGuy

    Diving Tank

    I understand the sizes are different, I had mentioned that in the first post. I am working on shop drawings now of the project idea so I have not had the chance to change the sketch. The concept is what I was introducing.
  9. CostalGuy

    Diving Tank

    hello all, this is my first post after checking this forum for help several times. I stink at coming up with names so I am stuck with the current one... I am doing a side project for a volunteer organization I belong to and the grand scheme of things is this: We have a 1100 gallon poly water...

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