Hello.
I showed the first photo to make it clear how the 2×4’s holds the weight.
On second picture I’ve put 2×4’s flat and marked corner , let me know please this place can holds the weight.
Weight of aquarium with water 850 lb and 48 inch in length
Replies
The only place you need to support weight is at the four corners of the aquariums, the second option will support more weight since the uprights are directly under the corners but that is not the main concern. I see no diagonal cross bracing or corner braces, unless it is secured to wall and ceiling beams, it is subject to falling sideways of forward under that much weight at the first imbalance.
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Thank you. Yes it’s secured to wall.
one corrner( red arrow) of 2x4 support not exactly under corner of aquarium. Is it no problem?
No, since the aquarium is supported on 4 corners, it only applies 200 # on each , no 2 X 4 will buckle with 400 # vertical loads , however, I see no cross bracing, especially in the lower leg sections, if they get hit with a handling equipment or if someone lays a ladder to service the top aquariums, it could topple.
Thank you.
IMHO an engineer needs to take a look at the structure. Especially the joints where the horizontal 2x4s meet in the first pictures. Any failure will be epic.
I'm not an engineer, but I am skeptical that you have enough support. You don't mention what the floor is made of. I would be concerned about that as well. Get someone (engineer) who knows how to do the math and understands material strength.
I would say, Not the four corners only, the entire perimeter of the base.
And no, I would not trust a 2x4 in that orientation with that much weight.
Th estand needs to be solid and stiff, no sagging under the load of the water.
I’m not an expert in any of this — but given the weights involved, the entire shelving structure should prolly be metal rather than wood.
Not an engineer but I've built a lot of shelves, some of which have heavy stuff on them.
The first image appears to show a frame made with 1 inch thick wood.
provided your structure avoids common failure modes, it can be made from fairly thin material.
You need to ensure that:
1. Any joints that bear load are strong enough.
2. Racking is prevented
3. Bowing is prevented.
In the left picture (which is clearly adequate as it is in use) a 1 x 2 upright takes the vertical load and these are placed so that they are close to the corners of the aquariums, ensuring that the load is carried effectively downwards.
Other than the points where the corners of the aquariums meet the uprights, the rest of the wood is there to stop the uprights from bowing, to space them, and to provide a point at which the aquarium can be added to the frame. Nothing more, and it does not need to be thick to achieve that. It could be a fair bit lighter but it would look odd.
Wood is ridiculously strong in compression and this entire edifice is designed to achieve that - wood in compression. When compressed, wood will flex - using 2 x 4 will make it stronger by far, but you are not storing that much weight on each leg, hence the original being made of much thinner wood braced to prevent flexing/bowing.
Whilst you could use an engineering program to calculate the thinnest wood capable of supporting the specified weight, it is better to over-build and that is what the original designer has done.
I note that the floor part was done with thicker timber, possibly to spread the load, or simply because it would be easier to fix to thicker timbers. You will need to be sure that the floor will handle the weight. Against a wall, most should.
As for your circled corner - that will be just fine.
Thank you very much all of you, guys!
P.S.
this is how it will be