Safety factor

Discussion in 'General Discussions and Advice' started by Stressed Eric, 24 Jun 2009.

  1. Stressed Eric

    Stressed Eric

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    Hi Hennie,

    Please advise, I've, uhm, "acquired" some 4mm glass sheeting that shouts nano very loudly, I've used your calculator to work out FOS with a height of 580mm, width and length of 860mm and I get a big bold 1 with red background. This is bad. If I add euro bracing to the build, will I get into any safe zone with this thickness glass ?

    Any other suggestions other than to shrink the build dimensions?

    Thanks,

    Mark
     
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  3. Tobes

    Tobes Retired Moderator

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    If I may chip in here Oom Hennie :p

    Howzit Mark, I would not take the chance with 4mm glass on that depth. You are using the water height and not total glass height hey? Try lowering the water height and see. Also play with 6mm - it will give you a rough idea as to what will be safe. 4mm?? Hmmmm..... not me buddy.
     
  4. Stressed Eric

    Stressed Eric Thread Starter

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    Eish, it lowers to 0.9 with a water height of 500mm.

    Bugger.

    Guess I'll use it for a something-or-other instead!
     
  5. Tobes

    Tobes Retired Moderator

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    How can the safety factor lower if you drop the water height? It should increase for the better as the pressure is less on the glass. You're doing it right?
     
  6. Boendoe

    Boendoe

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    I will not recommend the 4mm rather go will 6mm like Tobes said, I don't know a bout you but I hate waking up to the sound of running water in my living room.
     
  7. leslie hempel

    leslie hempel Moderator MASA Contributor

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    for sumps 4mm is cool as it will be strengthened by the partitioning, as for using it for a DT id give it a skip, minimum id used is 5mm but prefer 6 (min) and 10mm for water heights of 550mm what are the total dims for tank?
     
  8. Stressed Eric

    Stressed Eric Thread Starter

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    I thought it strange too.
     
  9. Reef Maniac

    Reef Maniac MASA Contributor

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    Good advice given by everyone (thanks for the replies :)) - I agree that the 4mm glass is *much* too thin... Try to keep to a safety factor of at least 3.0.

    Hennie
     
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