advice needed on diy stand - The Planted Tank Forum
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post #1 of 38 (permalink) Old 11-10-2015, 07:57 PM Thread Starter
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advice needed on diy stand

Hello all
Just about finished work on my 2x6 stand for my 250 gallon. I have a question. I just noticed that the front top 2x6 (the beam that the tank rests on) has a slight bow at the end. Should I replace this with another section? The stand is all 2x6 skinned top bottom back and sides with 3/4" plywood.

Thanks david
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post #2 of 38 (permalink) Old 11-10-2015, 09:57 PM
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I would change it. 250 gallons is a lot of weight.
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post #3 of 38 (permalink) Old 11-10-2015, 10:44 PM
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May be a bit of communications difference? Bow means and arch or dip in the length of the wood. But you show a bit of gap that I would call twist? Not meaning to pick nits but the two would give me different thoughts on how serious it might be. For a bow where the tank will not set down firmly at all points along the edge, I might want to redo to get it all level. But for the gap and what I would have called a twist in the front board, I would not bother too much.
A couple thoughts? Is it possible that the gap might be due to the end of the short board not being cut totally square? Easy thing to happen that would make a small gap that would be no trouble, ever.
A second thought if it really bothers you enough to fight it, is to get a large clamp like a bar or pipe clamp to put across the top and pull the front board into line. This would require any top to be refastened and I might not bother but your choice. Not a major structural problem that I see unless the wood is green enough to continue twisting as it dries.
For me, I would simply watch and not worry until it really did something more.
The 2X lumber is not a perfect world when building and a 250 is one way to hold things down so they don't move!
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post #4 of 38 (permalink) Old 11-10-2015, 11:04 PM Thread Starter
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Hello

Twist I believe is what we would call it then. The end of the 2x6 is the only part that exhibits this. Instead of the end looking like this:........ I it looks like this.......... ) Yup 2x4 or 2x6 lumber is not exactly straight. The lumber is cut straight, and I did try to clamp it down to close the gap but it wouldn't work.
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post #5 of 38 (permalink) Old 11-10-2015, 11:39 PM
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My method? At this point, I say, "darn it, darn it " until somebody begins to look at me and then I ignore it! Way too much involved in removing the top, etc, to correct a small defect that won't be a real problem. Far worse problems built into most houses. They often use a bar-type gizmo to twist floor joists back into line when building.
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post #6 of 38 (permalink) Old 11-11-2015, 01:03 AM
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That gap will be a non issue especially when skinned with 3 quarter ply. Secure the skin properly and that stand will hold far more than 250g

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post #7 of 38 (permalink) Old 11-11-2015, 01:03 AM
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I will add though that if you go over 120g and have a mig machine you might as well do a steel stand

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post #8 of 38 (permalink) Old 11-11-2015, 01:05 AM
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Got pictures of the rest of the stand together? Sorry not sure how to edit posts on tapatalk haha

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post #9 of 38 (permalink) Old 11-11-2015, 01:27 AM Thread Starter
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post #10 of 38 (permalink) Old 11-11-2015, 01:46 AM
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Looks really good.

Theoretically, you could have 4 steel dowels standing up from the floor; holding each corner and nothing matters in between.

A rimless tank, however, is a different story.

I recently built a 48x12 stand with a friend of 1/2" mdf and 2x3's and during the build had my doubts. Upon checking level its was dead on. The 2 Mr30's were dead nuts level both ways.

I will say that a tip from the old guys proves to be a short cut. Use a little liquid nails during construction to avoid puttying the gaps later.

Have faith.

Cheers!

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post #11 of 38 (permalink) Old 11-11-2015, 02:06 AM
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Was doing a little research on the stand that I built for my 75 gallon and was surprised to learn the compressive strength of various wood columns.
https://courses.cit.cornell.edu/arch...7.1/index.html
Would seem that a pair of 2x6's attached side by side and measuring 3' in length would support 4,559 pounds.
Considering my corner posts measure 3"x5" each for a 75 I am pretty certain I overbuilt mine (pretty much the way I like to do things, LOL)

In the OP's case, I think he has more than enough compressive strength. Now the real question would be how strong is it when you bump into it?


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post #12 of 38 (permalink) Old 11-11-2015, 07:34 AM
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I would not worry about that. I've built stands for 80-150 gallon tanks. Wood is amazingly strong as others have stated, skinning with plywood adds a ton of shear strength to the build. If you're concerned about gap or plywood not setting even just do a little sanding.
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post #13 of 38 (permalink) Old 11-11-2015, 06:29 PM
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While there are always places where we could do something different, I would not even consider a redo on this small point. For getting it totally straight a person could do it ,though.
It would take far more effort than worthwhile to me but taking the top off and then using a clamp like a pipe clamp placed across the top from back to front would be able to squeeze the small twist out of the 2X6. Some good wood glue and left to set plus a screw or two and the thing would be "perfect".
But then I like to leave a few defects for those who are nitpickers. That gives me a better read on who I want to keep as friends and who not to invite next time!
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post #14 of 38 (permalink) Old 11-12-2015, 01:25 AM Thread Starter
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Thanks boys!

I really do appreciate the vote of confidence. This is the first stand I've built. Couple.that fact with 250 gallons and ones mind begins to project the worst! Yup I'm a perfectionist....but I'm getting better.

Now should I bother with Styrofoam on the top? Yes the aquarium does have a rim. I have heard both schools of thought here. The top plywood is flat and level.

Thanks David
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post #15 of 38 (permalink) Old 11-12-2015, 04:22 AM
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You can argue it both ways. I've tried both and now find it not worth the effort even though small. The extra layer gives any spilled water a place to run under and set in a place where it can't be removed. This can lead to some nasty fungus that looks like a good chance to turn to rot. I just don't see enough value in it to need it.
When looking at size, I feel far safer with larger tanks. If the stand will hold the load up, they are really hard to move in any other direction. Somebody mentioned bumping as a hazard. Anybody big enough to really bump a 250 gallon tank very far?
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