How to calculate water pressure on glass walls.

[hwchoy]

its 5 metres lah!

[oblivion]

wow!

thats well over 16 feet!

[XnSdVd]

not only it has to be not a HDB, but it has to be sitting on the ground floor, with no basement.

Yes.. i've got my eye on old shophouses.

1) Because no matter how old or run down they are, they still look good
2) High ceiling, How else am i going to accomodate the damn tank?
3) Airwell! Some natural light is always good for the tank, and i can collect/pipe rainwater too
4) Dimensions, they're usually 5x15m and 2 1/2 storeys high
5) Heritage site! garmen won't try to buy me out and tear it down... mah
6) A really really cheap one in little india will cost you $300,000 - 500, 000


Same price range as a 5 room HDB! Sure it's ugly, but i have a habit of tearing up anything premade and re-doing it anyway.
Problem is i'll only be making like $1300 - 2000 when i start working

And back to the question: What's the formula?

[hwchoy]

find a civil engineer lah.

[Justikanz]

Hmm... I am not a civil engineer, never studied fluid mechanics... Anyway, this thread is changing course to a chit chat thread on Shannon's proposed 5m tank...

[XnSdVd]

Unfortunately even my math lecturer doesn't know. He's asking HIS physics lecturer to see if there's actually a formula to calculate it.

[hwchoy]

you ask the wrong chap, this is engineering (physics also can) not maths

[stephen chung]

Yes.. i've got my eye on old shophouses.

1) Because no matter how old or run down they are, they still look good
2) High ceiling, How else am i going to accomodate the damn tank?
3) Airwell! Some natural light is always good for the tank, and i can collect/pipe rainwater too
4) Dimensions, they're usually 5x15m and 2 1/2 storeys high
5) Heritage site! garmen won't try to buy me out and tear it down... mah
6) A really really cheap one in little india will cost you $300,000 - 500, 000


Same price range as a 5 room HDB! Sure it's ugly, but i have a habit of tearing up anything premade and re-doing it anyway.
Problem is i'll only be making like $1300 - 2000 when i start working

And back to the question: What's the formula?

Shophouse in Little India so cheap? $300k-$500k ??

[andrewtyr]

just go look see other ppl's 5m tank and measure the glass thickness and observe the construction. Even if u know the hydrostatic stress, you probably have to account for other factors like gravel, safety factor etc. Considering probable things like leak repair and transport of glass, it more worthwhile to spend that couple of hundreds more to get the pro to do it.

[hwchoy]

just go look see other ppl's 5ft tank and measure the glass thickness and observe the construction. Even if u know the hydrostatic stress, you probably have to account for other factors like gravel, safety factor etc. Considering probable things like leak repair and transport of glass, it more worthwhile to spend that couple of hundreds more to get the pro to do it.

psst Andrew, its 5 METRES.

[andrewtyr]

psst Andrew, its 5 METRES.

[valice]

just go look see other ppl's 5m tank and measure the glass thickness and observe the construction.

Think the only place he can go see that is either the Bird Park or the zoo enclosures... And the glass are freaking thick!
Superb distortions when viewed at an angle...

[XnSdVd]

Haha, looks like we aren't used to the metric system in aquatics... Anyway, i need to calculate more than just the glass. I'm thinking to do 1 side glass 4 sides fibreglass.

[andrewtyr]

Anyways, you have to take note of bending moments at the middle of the tank which is most prone to failure. And probably the floor load. And you would probably need to save some 10 years before you can pay for a shophouse. And...And...

[uklau]

Everybody has a dream & it's good because it keeps your life going on in a meaningful way.

[XnSdVd]

AH HA!! Finally have the formula!!

(Atmosphearic pressure + Pressure at bottom of tank x height x ro?(some funny P looking sign) x surface area)/2 = force against glass

Now, can someone please make sense of it for me?

[Shadow]

what is "ro?(some funny P looking sign)"? water molecules weight?

[andrewtyr]

density of water i think

[Justikanz]

'ro' is the sound of the mathematical symbol commonly used to represent the density of the subject of measurement. Yes, it looks like a 'p' tilted at an angle towards the front...

Good luck and have fun with the formula, Shannon!