What do you think is the cause?

  • We are currently upgrading MFK. thanks! -neo
the stand was made of 2" x 3" it has a proper brace on the back and sides. However on the front where there is the opening of the cabinet the brace in there was 2 2" x 3" on each brace. its a 4ft length of opening.. do you think it might cause the problem? If so since the sump is already there i will ask my carpenter to add another brace in the middle.
 
nope.. single 2" x 3" is on the horizontal top with 3/4" marine plywood solid top and on the vertical brace is 2 2" x 3". from bottom to the top.
 
I have two comments:

The 1/2" rubber may have been too dense to offer any stress relief from a sagging/twisting stand. Hard rubber is no different than stiff styrofoam, both do not compress given the low force per frame inch of a glass tank.

The stand definitely does not have enough center support. If your stand was only effectively supporting the ends of the tank, I could see how that could possibly cause the bottom glass to crack down the center. Could you tell if the sides of the tank were bowing out (or in) when it was filled?
 
Tanks only need to be supported by the corners.

Perhaps there was a rise on the front or back, or a defect in the plywood that isn't apparent until pressure is applied.
 
It's hard to say what actually caused it. They stand may have been level without weight, but it may have sunk once it was filled or the floor may have flexed under the weight. Did you check the level of the tank once it was filled?
 
imho... That 3/4 solid marine plywood is pretty much useless :-) .

A open box with an open top made with 3/4 plywood would be much better than the 2x3 across with no center brace.

AKA nandopsis at palhs :-)
 
vfc;4390583; said:
I have two comments:

The 1/2" rubber may have been too dense to offer any stress relief from a sagging/twisting stand. Hard rubber is no different than stiff styrofoam, both do not compress given the low force per frame inch of a glass tank.

The stand definitely does not have enough center support. If your stand was only effectively supporting the ends of the tank, I could see how that could possibly cause the bottom glass to crack down the center. Could you tell if the sides of the tank were bowing out (or in) when it was filled?
Click to expand...

Unfortunately i cannot tell since it is covered. But the sides already has a brace to support the weight though. Maybe that's the fault the center brace in the opening door. I will try to add additional brace in that center since the sump is already inside.

Here's the structure of the stand though. There's a brace across the top though i forgot to put in there. Also the stand is coated with water proofing i don't know if that make sense. :D
structure.jpg


top2.jpg


hope that helps.
 
Pharaoh;4390628; said:
It's hard to say what actually caused it. They stand may have been level without weight, but it may have sunk once it was filled or the floor may have flexed under the weight. Did you check the level of the tank once it was filled?
Click to expand...

I forgot to check the tank level once filled though. I'm at the 4th floor though do you think it may contribute to the factor?
 
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