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Topic Review (Newest First)
02-07-2013 12:37 PM
DogFish
Quote:
Originally Posted by GOJIRADOR View Post
..... My research tells me that even at 70 lbs the wood is more likely to break than the screw is to rip out. My room mate and I have already tested our weight on it but I'll post a pic to provide some solid evidence
Did you factor in leverage? Load strength is typically measured with gravity. When you hold the handle the edge of the tank base becomes a fulcrum point.
Good design idea to use two pipe straps. I think a full pc.of dowel rod would be stronger. Better still would be 1" black water pipe. In H.S. we couldn't afford both Barbell plates and the bars so we used Black water pipe.

It's hard to tell if you used pine or oak dowel. Oak will give mote strength. Also consider the direction of the dowel wood grain in relate ship to the fulcrum point. Think about how & why a baseball cracks when it hits a baseball.

Interesting concept, the older I get the them more moving tanks becomes a real concern. Looking forward to see how this develops.
02-07-2013 05:28 AM
GOJIRADOR I extended the handles and set them on pedestals after which I placed 400 lbs on the board aaaaannnd nothing happened. I let it sit awhile and still nothing happened so I got on it my self and started jumping and still nothing. What I'm going to do is add a fail safe similar to what you were saying, lochabar. Just having long poles threaded through when I need them is arguably the smartest solution but I want the most bad ass so that simply wont do. The sleeve option was the original idea but I couldn't figure a practical locking mechanism with the materials and time that I had. Now I'm reconsidering it because I have a lot more time. Unfortunately it might be a while before I can post updates because there isn't any money in the aquarium account right now.
02-05-2013 09:18 PM
lochaber Maybe you could stick a couple lengths of (sturdy) pipe on there, bolt that on with the brackets, and use that as sleeves for the extendable handles (I'd still want to use iron pipe for those, from what I've seen, wooden dowels (even thick ones) don't do so great with anything but compressive forces)

That might isolate (or at least reduce) the bracket screws from the lever-effect.

Think about using a claw hammer to rip out nails, It's not a huge lever, but you can still apply a lot of force, enough to rip out screws.
02-05-2013 08:37 PM
GraphicGr8s
Quote:
Originally Posted by GOJIRADOR View Post
I forgot about the multiplying forces! My dad had convinced me that the screws would hold, but I don't think he did the math I'm going to have to talk to him about it again... I have a couple of ideas for strengthening it, so I guess stay tuned!
Save yourself aggravation. Use the short ones for giggles. When you move the tank later on just buy 2 dowels long enough to go through in one solid piece, or better yet as Hoppy said pipe, so the only thing the screws and pipe brackets are doing is keeping them in from sliding left off the long edge.
02-05-2013 07:18 PM
The Big Buddha Nice job on the stand, but the handles looks like a really bad idea.... set up a small 10 Gallon while you are in school, if you really must have one. It will be easier to move around. Wait until you are done school and then set up the tank somewhere a little more permanent. Are you on a ground floor at school? Is there an elevator or stairs involved in moving the tank? Or are the moves on the same floor in a dorm?

Either way, good luck with the project, the stand is nice.
02-05-2013 05:47 PM
GOJIRADOR
Quote:
Originally Posted by GraphicGr8s View Post
Four of your brackets are taking all of the load. The outer brackets are only holding the rods in place. What you've created is a simple lever on the inner brackets and you're actually multiplying the forces there. You've got straight line force on wood fibers. Start sloshing water around added to your actually moving the tank and you're just asking for trouble. We're only trying to help you avoid a problem. Trust me, I've built a few things that sounded good, worked in theory, and actually worked great in practice. For a while. Fortunately those instances have been rare. Sort of. Last one was a lumber cart. Looked great though
I forgot about the multiplying forces! My dad had convinced me that the screws would hold, but I don't think he did the math I'm going to have to talk to him about it again... I have a couple of ideas for strengthening it, so I guess stay tuned!
02-05-2013 02:29 PM
scapegoat i think if you use this to transport a tank...

you're going to end...



all washed up
02-05-2013 02:12 PM
GraphicGr8s Four of your brackets are taking all of the load. The outer brackets are only holding the rods in place. What you've created is a simple lever on the inner brackets and you're actually multiplying the forces there. You've got straight line force on wood fibers. Start sloshing water around added to your actually moving the tank and you're just asking for trouble. We're only trying to help you avoid a problem. Trust me, I've built a few things that sounded good, worked in theory, and actually worked great in practice. For a while. Fortunately those instances have been rare. Sort of. Last one was a lumber cart. Looked great though
02-05-2013 04:17 AM
GOJIRADOR What I should say is thanks but it seems like I've left some details out of the description. They're not dry wall screws they're heavy duty wood screws that I bought seperately. There are Eight screws experiencing most of the load, I went to this website and calculated the weight of my tank at 1/3 volume which = 254.42 lbs / 8 screws = 31.8 lbs per screw, but they are not experiencing ALL the load because there is a second set of brackets that is accepting a smaller amount of force, even so 31.8 lbs is not enough in my mind to worry about. My research tells me that even at 70 lbs the wood is more likely to break than the screw is to rip out. My room mate and I have already tested our weight on it but I'll post a pic to provide some solid evidence
02-05-2013 03:32 AM
GraphicGr8s Hoppy, take a gander again at the pictures. Do you see those pipe brackets through bolted? I sure didn't. Drywall screws at worst, wood screws at best. But wood screws nonetheless. In a straight line with the load. That won't pull out straight away now will it? (Rhetorical)
02-05-2013 02:56 AM
Hoppy
Quote:
Originally Posted by GraphicGr8s View Post
I'd be surprised if it DID hold. Leverage is on the tanks side here. Use the short handles as the gimmick but leave it so you can get them out. Then get a dowel that will span the entire tank and leave you enough to grab hold of. Then you have a continuous piece.
I strongly doubt that those pipe brackets will work for the weight of the tank. If you are wrong about how well they will work you lose the tank, dump whatever water and substrate you have in it all over the floor, and have a major clean-up job to do, plus possibly paying for water damage. It isn't worth the gamble in my opinion. If you do as GraphicGr8s said, it would be much more likely to work - then it only fails if the dowels break, but I would use steel pipes instead.
02-05-2013 02:49 AM
GraphicGr8s
Quote:
Originally Posted by GOJIRADOR View Post
Well I haven't gotten a chance to test it yet hahah I DO NOT plan on lifting it with a full tank on it, I don't even think I have the strength lol I plan to be able to lift it with a tank 1/3 full of water for when I move (I'm in college so it happens alot). I'd be surprised if it couldn't even handle that, but who knows!
I'd be surprised if it DID hold. Leverage is on the tanks side here. Use the short handles as the gimmick but leave it so you can get them out. Then get a dowel that will span the entire tank and leave you enough to grab hold of. Then you have a continuous piece.
02-05-2013 01:56 AM
GOJIRADOR
Quote:
Originally Posted by GraphicGr8s View Post
Are you really going to try lifting a loaded tank up off the stand or is it to just move it on casters? OK just looked again. No casters. Do you think the wood screws (don't see any through bolts) will hold?
Well I haven't gotten a chance to test it yet hahah I DO NOT plan on lifting it with a full tank on it, I don't even think I have the strength lol I plan to be able to lift it with a tank 1/3 full of water for when I move (I'm in college so it happens alot). I'd be surprised if it couldn't even handle that, but who knows!
02-05-2013 01:44 AM
GraphicGr8s Are you really going to try lifting a loaded tank up off the stand or is it to just move it on casters? OK just looked again. No casters. Do you think the wood screws (don't see any through bolts) will hold?
02-05-2013 01:11 AM
GOJIRADOR
Quote:
Originally Posted by BoxxerBoyDrew View Post
Interesting!!!

Why the groves in the top of the legs? Also are the legs regular 2x4s glued together?

subscribed!
Drew
Awesome no one has subscribed to one of my threads before! I needed the grooves so the retractable handles could be in the most stable postion, which is where the legs are.

Quote:
Originally Posted by pweifan View Post
This is very cool. Looking forward to updates.
Thanks

Quote:
Originally Posted by moonshinetheslacker View Post
This looks like its going to be pretty awesome! It looks like you've softened all the hard edges with a sander instead of using a router (a personal favorite of mine, as the detail makes it slightly more personal instead of standard) and I'm guessing you are going to whitewash or leave the wood uncovered and unstained. Im sure its all going to be beautiful.

I do have two very small recommendations. Make appropriate cuts in your bottom shelf so you can install cabinet doors at a later date (think 5 or 10 years down the road) you can even place the cuts innthe back, so the front will still look the same. That, and find a spot to install a paper towel holder!! The second bit was very sage advice given to me when I was building my Asian aquarium stand.

Peace be with you. Good luck with your bad @@@ stand.
Thanks! yes I used a sander. The gurney was coated in a finish (sorry cant remember what it is, but it was used to refinish an old table) that made it very smooth and watertight, the rest is painted.

I'm not quite sure what kind of cuts you're describing but oh well I've already got some doors on ha Definitely appreciate the advice on the paper towel holder it will be added to the design!
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