Rimless tank

Discussion in 'General Discussions and Advice' started by Zebrasoma, 8 May 2015.

  1. Zebrasoma

    Zebrasoma

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    Im busy building a new tank with the following measurements - 1200L x 500W x 600H. All being 10mm. There is a full length divider going in 100mm fromm the back pane (also 10mm) and allowing a overflow height of 550mm. (like the redsea max tanks).

    Question: Can i build this safely of 10mm glass without any bracing?

    Thanks guys. :thumbup:
     
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  3. carlosdeandrade

    carlosdeandrade

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  4. carlosdeandrade

    carlosdeandrade

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    According to the calculator, to have a standard safety factor of 3.8, the thickness of the glass should be 12mm. At 10mm, you only have a factor of 2.8. If you take the water level around 550mm, you will need 11mm glass for a standard safety factor of 3.8.
     
    Last edited: 9 May 2015
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  5. Nemos Janitor

    Nemos Janitor

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    Carlos, can you please explain the "standard safety factor".
     
  6. carlosdeandrade

    carlosdeandrade

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    I quote reef maniac. Follow the link. He explains it best. Sure you know Keith, don't you build tanks?:D
     
  7. carlosdeandrade

    carlosdeandrade

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  8. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Maybe drop your height a bit. Mine is 1.2 x550 x 550, 10mm starfire, water level at 500, no bracing with no bowing issues.
    Older system was 1.2 x 800w x 500h No issues there either.
     
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  9. Zebrasoma

    Zebrasoma Thread Starter

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    If i were to put a THIN brace on the front pane, what would be the thinnest? 50mm?
     
  10. Mekaeel

    Mekaeel Moderator MASA Contributor

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    You mean 5mm? To give you peace of mind, that IMO will work!
     
  11. Nemos Janitor

    Nemos Janitor

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    OK lets cut the blab.

    What is he safety standard.

    It seems to be some sort of measure that is a myth or deterrent that some have to discourage DIY.

    I still need to know what this safety factor is.
     
  12. Nemos Janitor

    Nemos Janitor

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    Nearly 2 and great bit of inches lad.. whoever suggested that??....:eek:
     
    Last edited: 10 May 2015
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  13. Zebrasoma

    Zebrasoma Thread Starter

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    I mean like in width, not thickness. LOL
     
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  14. CameL

    CameL

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    @Nemos Janitor, i think it refers to the minimum safety rating an insurance company would insure. as far as i know an insurance company needs a safety factor of 3.8
     
    Last edited by a moderator: 26 Nov 2015
  15. 459b

    459b Moderator MASA Contributor

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    Talking about cutting the blab....If the measure is a myth, can you please explain how one determines the correct glass thickness.
    A lot of your late night posts are written in some sort of code which confuses all of us. If you have something to say then speak up, not all of us want to spend hours trying to decipher cryptic messages.
     
  16. carlosdeandrade

    carlosdeandrade

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    Well, the safety factor is a number that all good tank builders use in order to keep tanks from breaking under certain conditions.
    The variability of the strength of glass due to limitations of the manufacturing process means a suitable safety factor must be used when calculating glass thickness. The factor commonly used is 3.8. While not a perfect guarantee, it will remove all risk bar that of damaged or very poor quality glass. The main damage that will cause failures is scratches and chips. Also a point load on the glass surface will cause it to fail. For this polystyrene or other soft under tank fillers are used to stop the point loading of sand and rocks.
    Calculating Glass Thickness for Aquariums
    The website above gives a great example on how to calculate the ratios used in constructing tanks.
    I hope this is useful, even though the information might be somewhat confusing and detailed.
    At the bottom of the site are three calculators available for your use, one even for your Excel program for your PC.
     
    Last edited: 11 May 2015
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  17. carlosdeandrade

    carlosdeandrade

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    Nothing wrong with DIY tanks and even building your own equipment, just discourage three hundred litres of salt water in ones lounge along with the loss of all live stock, and a very disillusioned reefer lost from this hobby of ours.
     
  18. Nemos Janitor

    Nemos Janitor

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    Well Carlos seems to understand the code.:biggrin:. David it is not code. Nothing is cryptic. You might understand the processes and take for granted certain issues. I try and get the reefer to ask questions to self, and seek the answers. I am sure many a reefer did a lot of research into the subject and learned a lot. It is about reefers understanding what is said on the forum. Too many take what is said for granted.

    Whilst Carlos link is exactly what reefers need to understand. It is a little old, 2001 and there has been a lot of advancements in manufacturing processes.
     
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  19. ty

    ty

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    Following this thread
     
  20. Nemos Janitor

    Nemos Janitor

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    Despite the nice link Carlos provided, I still want to know how this safety factor figure comes about. My question is not answered. To me it just seems to be a number plucked out of the sky.

    Yes I know that calculators use a factor of 3.8. I want to know exactly why. I dont accept we all use it or it has been done for years. Prove to me why 3.8 is the best pie in the sky number.:biggrin:
     
  21. Nemos Janitor

    Nemos Janitor

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