Walnut shelf for 12g long - Page 2 - The Planted Tank Forum
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post #16 of 30 (permalink) Old 04-08-2013, 07:51 AM Thread Starter
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The slab is floated about 3/4" off the wall. It sits on top of a series of 1" black pipes which I attached to the wall with a pipe flange. The flange is screwed into the wall framing which I have installed sister studs from the backside for more strength. Make sense? I could have bored the pipes in the slab to conceal them but at 30" off the floor it's hard to see the pipes under the shelf.
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post #17 of 30 (permalink) Old 04-09-2013, 11:18 PM
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So, is it just pipes bolted onto the studs via pipe flanges? unless you have some direct floor-table vertical supports, or some sort of cantilevered support, I'd be real hesitant to put much over a couple gallons on it.
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post #18 of 30 (permalink) Old 04-10-2013, 04:42 AM
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Can you put all of your weight on one of those pipes without it deflecting? If so, it is probably strong enough. I would hesitate about trusting a pipe flange for much structural support. I would worry about the screws either pulling through the flange at the top, or popping the heads off the screws.

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post #19 of 30 (permalink) Old 04-10-2013, 05:27 AM
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Can you put all of your weight on one of those pipes without it deflecting? If so, it is probably strong enough. I would hesitate about trusting a pipe flange for much structural support. I would worry about the screws either pulling through the flange at the top, or popping the heads off the screws.

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I can sit on it without the supports flexing.
I think that is a great idea and looks beautiful. A rimless tank would look killer on that shelf. I'm definitely tagging along!
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post #20 of 30 (permalink) Old 04-10-2013, 05:31 AM
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If you are running all the mechanicals in the other room, can you run tubing for the filtration through your support system? Seems like it would strengthen that shelf if one or two of the 1" pipes went all the way through the wall.
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post #21 of 30 (permalink) Old 04-10-2013, 06:59 AM Thread Starter
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The iron pipe supports are actually 1.5" and have an extremely high modulus of elasticity. The load (shelf weight plus 120lb tank) is uniformly distributed across 5 cantilever pipes spaced 16" OC, with a majority of the load being placed on the fixed side of the cantileaver. The pipe flanges are attached to 4x4's by way of through 5/16" carriage bolts. There is Drywall between the pipe flange and bearing wall with a compression strength of around 300-400psi. The weak link is actually the bearing wall but with double 2x4 framing structural failure is highly unlikely.
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post #22 of 30 (permalink) Old 04-10-2013, 11:51 AM
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Sounds like there are some doubting Thomas engineers following this thread.

I know nothing about this type of construction - I just think it's a drop-dead-gorgeous shelf, and I can't wait to see photos of the tank on it.

I looked for your build journal and couldn't find it. Do you have a direct link?
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post #23 of 30 (permalink) Old 04-11-2013, 02:17 AM
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I think you have it strong enough, with adequate safety factor too. The through bolts, and the 4 x 4's plus having 5 of the pipes supporting the load convince me.

I don't think we are doubting Thomas's, we were just lacking the details.

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post #24 of 30 (permalink) Old 04-11-2013, 11:24 PM
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Yeah, that sounds a bit stronger then what I was imagining. I was thinking of a pipeflange just held in with some woodscrews.
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post #25 of 30 (permalink) Old 04-15-2013, 12:23 AM
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post #26 of 30 (permalink) Old 11-04-2013, 05:37 AM
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post #27 of 30 (permalink) Old 11-11-2013, 10:25 PM
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Wow, that's pretty awesome. It's also funny how many people get concerned about 100lbs on a shelf. Seen much crazier/heavier things in my life and that shelf looks pretty solid.
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post #28 of 30 (permalink) Old 11-12-2013, 05:53 PM
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Wow, that's pretty awesome. It's also funny how many people get concerned about 100lbs on a shelf. Seen much crazier/heavier things in my life and that shelf looks pretty solid.
Cantilevered shelves can look very sturdy, but still deflect with something heavy on them. If an aquarium is what is making it deflect, the non-level aquarium might be a serious problem. However, this one is obviously very sturdy, so that isn't likely to be a problem. I hope we can get an update though.

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post #29 of 30 (permalink) Old 11-12-2013, 10:56 PM
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FYI:
Hi Hoppy

The slab walnut shelf was built and installed in my gallery space. Shortly thereafter it was sold to a client and installed in there residence. I can't complain about the sale but I'm left bare until I find time to process another slab.

-c

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Some of us are wondering how your walnut shelf project (http://www.plantedtank.net/forums/sh...d.php?t=269002 )is working out. It would be great to see a photo and hear about how it is working.

Hoppy
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post #30 of 30 (permalink) Old 11-13-2013, 06:51 AM
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Thanks Hoppy. While not the answer we were really looking for, its something I guess.
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