Did I use correct glass thickness?

Discussion in 'Anything DIY Related' started by Punk, 13 Nov 2007.

  1. Punk

    Punk

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    hey guys, i built the below tanks & i'm scared i didn't use the correct glass thickness... should they hold or should i redo them before disaster strikes (i'm too scared to do the FW test LOL)? thanks! :)

    i built 4 of these tanks:
    500mm(L) x 500mm(W) x 250mm(H)

    i also built a sump:
    500mm(L) x 500mm(W) x 300mm(H) with 3 baffles

    i used 6mm glass for the bottoms and 3mm glass for the sides
     
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  3. Punk

    Punk Thread Starter

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    oh & i drilled a 50mm hole for the overflows in the bottoms of the tanks! will this compromise the strength of the 6mm glass bottoms too much (these tanks won't have to hold rocks, they'll be completely BB)?
     
  4. Mike

    Mike Retired Moderator

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    I would say the sides would be too thin, have you fitted brace bars?
     
  5. Punk

    Punk Thread Starter

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    nope, do you suggest i put in brace bars? have you got an example of how i can do it? thanks!!! :)
     
  6. Mike

    Mike Retired Moderator

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    The brace bars would be a strip of glass (around 40mm wide) that should be siliconed about 20mm from the top of your tank, the glass should be the same thickness as your sides.

    Do your f/w test after about a week of putting the tanks together (one day of curing for every mm of glass thickness) if it can hold water for a week it will probably be ok.
    For what it's worth, i wouldn't be comfortable with glass that thin
     
  7. Alan

    Alan Admin MASA Contributor

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    I would also be weary of glass that thin, remembering this tank will hold some where around 250L of water. I am not saying it will be a problem as it is not very high, just personally i wouldn't trust it.
     
  8. Punk

    Punk Thread Starter

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    hi alan, it's actually 4 tanks each holding about 60 odd litres of water (500x500x250), the sump is 500x500x300, would the 3mm be OK for the sides? thanks!
     
  9. Alan

    Alan Admin MASA Contributor

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    Oops sorrry my bad, run the fw test and see.
     
  10. leslie hempel

    leslie hempel Moderator MASA Contributor

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    3mm never a good idea too fagile.... at least 4mm
     
  11. Galibore

    Galibore Retired Moderator

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    Agree with Les, I recommend 4mm all round. 250mm is very shallow so it would be fine.

    Standard 2ft tanks are normally built using 4mm and no bracing and they are 30cm high.
     
  12. Mekaeel

    Mekaeel Moderator MASA Contributor

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    dude i suggest stripping it down and going for 6mm atleast.the guys did mention 4mm but hey rather safe than sorry
     
  13. Rod

    Rod

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    I personally would not have used 3 mm glass, (there is only about a 10 % difference)however for the water levels they should be fine. The problem really is how delicate the glass is. So beware of knocks.
     
  14. Kanga

    Kanga Retired Moderator MASA Contributor

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    Gotto say 3 mm is to thin IMHO, might work but a small knock or bump going to be disastrous, and possibly dangerous, you dont want somebody standing in front if it breaks
     
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