Another Redundant Acrylic Question

[greenstarman]

I messed up at least I think. I had my local glass and plastic supplier set out a piece of acrylic in front of his shop that I picked up the next morning. Well after cutting and bonding two sides together I never even thought to inspect it and it shows that its Acrylite FF, Extruded. I have read several threads around here saying that Extruded shouldn't be used on holding water in large amounts. Does anyone know what that large amount is, and is there any sort of safe zone that its ok. What I am constructing is a sump with dimesions of 30Long, 10Wide, and 12High. I believe when operating it will hold approx 13 to 14 gallons. Could I run this for at least six months or a year to recoupe my cost in the Acrylite FF.

 

[bassnman11]

If its 1/4 or thicker it should work for that small a tank. For a sump it will only be about 2/3 full.

 

[sandiegan]

Agree if it's thick enough it'll hold for a while. And Bassnman, I think he took the 2/3 into account when he stated ~13-14g volume use.

 

[greenstarman]

The material thickness is 1/4" thick and thanks, I did take that into account. I believe tank completely full is 16 gallons. And my center baffle will be 2" inches from top.

 

[cres]

The key is to watch for crazing around the seams. If crazing starts, you will likely see it continue.

But, many people have built sumps from HD extruded acrylic and it works okay.

I have a top-off container I made using extruded. It is 24" deep. It has some crazing, but, it still holds water (8 months later). But, I wouldn't trust this container now if it wasn't in a water tight sump enclosure.

 

[spazz]

the big problem with extruded is that its not as dence as cast acrylic. there for it will absorb alot more water into the plastic and expand. the expantion causes the acrylic to craze and fail at some point in time. it will hold water for a while. but the longer its exposed to water the more it will expand and craze. so take that into consideration when it starts to craze and try to replace it before it gets too bad.

 

[hahnmeister]

You could use some acrylic trangular rod.... a equalateral 90degree profile, to add to the inside corners and bond into the corners to make the corners 1" of contact rather than 1/4". That should keep it from splitting.

 

[greenstarman]

So what I am getting from all of these threads is that basically I am screwed. Either I just try it and see what happns or suffer the disasaster. Hmm.. which will I choose.

 

[spazz]

<a href=showthread.php?s=&postid=7830884#post7830884 target=_blank>Originally posted</a> by greenstarman
So what I am getting from all of these threads is that basically I am screwed. Either I just try it and see what happns or suffer the disasaster. Hmm.. which will I choose.

some what ya. but seeing you have already got the acrylic and its a small tank the nglue it together and add some reinflrcements to it like hannamister mentioned. it would hold it. it might not look pretty but it would hold the water.

 

[manderx]

a equalateral 90degree profile

 

[nemo g]

manderex, i think nasa can help hahn out with this one,

with regards to an "eqUIlateral 90 degree triangle":

Sorry

This answer is incorrect.

The first answer of "Equilateral Triangle" is not correct because a triangle with a 90 degree angle in it can never have three sides that are of equal length. The reason for this is because there is a direct relationship between the length of the sides and the size of the angle opposite that side. What this means is if all three sides of a triangle are the same size then all three of its angles would have to be the same size as well. Since all the angles of a triangle add up to 180 degress to have three which are the same size would mean that each angle would have to be 60 degrees. This relationship for equilateral triangles is always true reguardless of the length of the sides

heres the link: http://www.grc.nasa.gov/WWW/K-12/p_test/math_9/math_p_q25_a.html

oh hahn

 

[GreshamH]

<a href=showthread.php?s=&postid=7832841#post7832841 target=_blank>Originally posted</a> by nemo g
manderex, i think nasa can help hahn out with this one,

with regards to an "eqUIlateral 90 degree triangle":

Sorry

This answer is incorrect.

The first answer of "Equilateral Triangle" is not correct because a triangle with a 90 degree angle in it can never have three sides that are of equal length. The reason for this is because there is a direct relationship between the length of the sides and the size of the angle opposite that side. What this means is if all three sides of a triangle are the same size then all three of its angles would have to be the same size as well. Since all the angles of a triangle add up to 180 degress to have three which are the same size would mean that each angle would have to be 60 degrees. This relationship for equilateral triangles is always true reguardless of the length of the sides

heres the link: http://www.grc.nasa.gov/WWW/K-12/p_test/math_9/math_p_q25_a.html

oh hahn

Can't you two work out your problems WITH OUT us having to read them? This is getting very old. You two need to stop stalking each other and completly ruining threads with your back and forth "jab" posts.

 

[nemo g]

gresh, sorry if you took it that way.

i thoughi i had posted a response to erroneous information. why wouold you want Mis-information to go unchecked? regardless of the poster.

dont you want Valid information?

 

[GreshamH]

Having just read a few other threads you two went at it, let's just say, it's getting old. Sure I want bad information corrected, but not in that style You can correct, with out bordline flaming.

 

[nemo g]

so if you have read those threads, you should be more than aware of his erroneous information, contradicting statements, and circular arguments.

im sorry if my "language" gets a bit harsh at times, although i dont resort to name calling (like hahn, according to him im a 12 year old), nonetheless i do get perturbed and sometimes it gets the better of me, but still manage to refrain from mudslinging.

As with this thread, all I have done is to correct yet another one incorrect statement. Forgive me.

Isnt it a bit odd that you feel my "borderline flaming", which is the first ive heard of it, is more offensive to you than hahn constantly filling threads with either useless, baseless, or just simply biased opinions and/or mistakes?

Seriously?

please lets move on, i didnt want this to become another superside tracked thread, lets please respect the thread starter and hope he gets his info.

silly how i posted information correcting someones mistake, and people get touchy and consume the thread with irrelevant banter.

 

[BlueCorn]

No need to roll your eyes nemo as he's right on the money.

 

[hahnmeister]

<a href=showthread.php?s=&postid=7832841#post7832841 target=_blank>Originally posted</a> by nemo g
manderex, i think nasa can help hahn out with this one,

with regards to an "eqUIlateral 90 degree triangle":

Sorry

This answer is incorrect.

The first answer of "Equilateral Triangle" is not correct because a triangle with a 90 degree angle in it can never have three sides that are of equal length. The reason for this is because there is a direct relationship between the length of the sides and the size of the angle opposite that side. What this means is if all three sides of a triangle are the same size then all three of its angles would have to be the same size as well. Since all the angles of a triangle add up to 180 degress to have three which are the same size would mean that each angle would have to be 60 degrees. This relationship for equilateral triangles is always true reguardless of the length of the sides

heres the link: http://www.grc.nasa.gov/WWW/K-12/p_test/math_9/math_p_q25_a.html

oh hahn

Oops, yeah...you know what I meant... I meant 'isosceles' (its been a while since geometry, the other day I was trying to teach someone partial derivatives and forgot I could factor 99...oh well). Sorry everyone, I didnt know it was going to result in nemo trying to pick a fight again. GreshamH, there are only 2 that I am aware of.

This is what I was talking about though. http://www.tapplastics.com/shop/product.php?pid=151&
Its used for reinforcing corners that might be in question... I dont know if it will help, or make it worse though since if the problem is 'expansion' a thicker piece would expand more than a thinner one. I have never had 1/8" extruded split, but I have seen 1/2" split. Since the expansion is a percentage, I dont know that it will really help, but if nothing else it should work by just adding more area to glue with. FWIW, I made a refugium a few years ago out of 1/4" extruded (thought it was cast at the time)... 30"x6"x12"high. Its been running now for 3 years w/o a problem. I do run it over a sump though so if it started to leak...

I used weldon #3 for the initial bonds, but then went back and added weldon #16 to the inside corners. I think that the 16 adds alot of leak protection even if the weldon #3 or 4 gives.

 

[manderx]

I meant 'isosceles' (its been a while since geometry, the other day I was trying to teach someone partial derivatives and forgot I could factor 99...oh well).

you mean 'right'. if you would just relax and stop trying so hard to impress everyone all the time. all you're doing is backing yourself into a corner.

 

[hahnmeister]

An isosceles triangle CAN be a right triangle, but a right triangle doesnt have to be an isosceles. In this case, I mean a 90 degree isosceles...which is what I said... RIGHT and ISOSCELES. Why you gotta be such a jerk manderx? Im not trying to impress anyone, I was trying to be as descriptive as possible and help the guy out. Heck, I even posted a link to exactly what I meant. You might not like me for whatever reason, but dont go dragging all these other fine people into your vendetta. What, are you going to check every post I make and be critical? Are my jokes in another thread not funny enough for you or something?

 

[BlueCorn]

I think this little exercise has gone on long enough. I believe that several of you owe the original poster an apology for getting his thread closed. If you're not able to have civilized conversations with one another, please find a new board to post on.

Closed