Weight in upstairs room
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Discussion

groucho

Original Poster:

12,134 posts

264 months

Wednesday 10th March 2010
quotequote all
I have just filled a largish column fish tank in an upstirs room. It is acrylic, so light; with the 268L of water I reckon it weighs around 290kgs.

It is in a next to the the chimney brest on a piece of board. The alcove is 800mm wide with a joist at each side and one in the middle. The standingboard does not reach the end joists, but it is floor boarded so the must be taking some weight.

The room is 2.5m wide and the joists span along this way. The joists themselves are 6.5 inches by 2.5 inches.

Does this sound OK as I'm getting paranoid.

How much water in an average bath?


Stegel

2,045 posts

192 months

Wednesday 10th March 2010
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If it's a modern-ish house the floors will be designed to take 150kg / m2. It sounds like your tank will exceed that, but given it is near the wall, should not be a problem as the joists will be designed for maximum bending at mid span and shear failure is not going to be a problem. That said, the joists sound very shallow for an upper floor, even with the short span, so perhaps it is not that modern, but given its location I don't see it being a problem even so.

How big are the feet of the stand - depending on where they fall relative to the joists, you may get some local deflection if the feet are pretty small, and I don't know how stable the tank and stand are if it moves away from vertical.

groucho

Original Poster:

12,134 posts

264 months

Wednesday 10th March 2010
quotequote all
Stegel said:
If it's a modern-ish house the floors will be designed to take 150kg / m2. It sounds like your tank will exceed that, but given it is near the wall, should not be a problem as the joists will be designed for maximum bending at mid span and shear failure is not going to be a problem. That said, the joists sound very shallow for an upper floor, even with the short span, so perhaps it is not that modern, but given its location I don't see it being a problem even so.

How big are the feet of the stand - depending on where they fall relative to the joists, you may get some local deflection if the feet are pretty small, and I don't know how stable the tank and stand are if it moves away from vertical.
The tank is flat bottomed and on a 20mm 600mm square board.

Joist sound shallow? I thought they were quite big...160mm deep.

The house is 100yr old.

Cheers

dilbert

7,741 posts

249 months

Wednesday 10th March 2010
quotequote all
Probably be allright. Sounds like it's way less than the weight of a filled bathtub.
I think the problem would come, if you had a large fishtank in every upstairs room, or perhaps a machine shop. (Which is the problem I have!)

Edited by dilbert on Wednesday 10th March 19:20

groucho

Original Poster:

12,134 posts

264 months

Wednesday 10th March 2010
quotequote all
Some pics




Muncher

12,235 posts

267 months

Wednesday 10th March 2010
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As a layman that looks like it will be ok to me but blimey it's a big tank!

dilbert

7,741 posts

249 months

Wednesday 10th March 2010
quotequote all
Having said it's allright, I would be a bit more careful with something like that!

I'd assumed that it would be wider than tall. Certainly in the corner it'll probably be O.K. Probably want to be a bit careful though. Make sure the base is larger than the spacing between joists!

All things considered though, it's no different from a hot water cylinder.

dugt

1,657 posts

225 months

Thursday 11th March 2010
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rolleyes wheres the fish?

wink



groucho

Original Poster:

12,134 posts

264 months

Thursday 11th March 2010
quotequote all
dilbert said:
Having said it's allright, I would be a bit more careful with something like that!

I'd assumed that it would be wider than tall. Certainly in the corner it'll probably be O.K. Probably want to be a bit careful though. Make sure the base is larger than the spacing between joists!

All things considered though, it's no different from a hot water cylinder.
The floorboards are 25mm thick and run the opposite way from the joists, so 3 joists have the weight.

It's only 100kg each. The floor hasn't budged a bit. Celing downstairs, no cracks, skirting still on the same level.

It's still here....for now.

iamrcb

607 posts

214 months

Thursday 11th March 2010
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you could keep a person in that, its huge!

Stevenj214

4,941 posts

246 months

Thursday 11th March 2010
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Stegel said:
If it's a modern-ish house the floors will be designed to take 150kg / m2.
Really? So 2 guys standing next to each other wouldn't be safe?

CaptainSlow

13,179 posts

230 months

Thursday 11th March 2010
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Holy st that's big.

What are you going to put in there? Does it have a pump/filter? That's gonna be a bugger to clean.

Stevenj214

4,941 posts

246 months

Thursday 11th March 2010
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groucho said:
Looks awesome. How do you plan to clean it?

FourWheelDrift

91,228 posts

302 months

Thursday 11th March 2010
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Just let me know when you want to change the title to "Weight now in downstairs room" wink

FourWheelDrift

91,228 posts

302 months

Thursday 11th March 2010
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Stevenj214 said:
groucho said:
Looks awesome. How do you plan to clean it?

groucho

Original Poster:

12,134 posts

264 months

Thursday 11th March 2010
quotequote all
CaptainSlow said:
Holy st that's big.

What are you going to put in there? Does it have a pump/filter? That's gonna be a bugger to clean.
Don't know what fish yet. Magnet and siphon for cleaning. Yes, it has a pump/filter.

robinhood21

30,946 posts

250 months

Thursday 11th March 2010
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You need a mermaid! smile

Z4monster

1,442 posts

278 months

Thursday 11th March 2010
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I Hope you're going to turn off the radiator as having it set at max is going to boil your fish.

Seriously I would make the support bigger and take it the whole of the corner to spread the weight over a larger surface.

Good Luck but it looks hard work to me.

dilbert

7,741 posts

249 months

Friday 12th March 2010
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It's funny, the size and shape of that tank I assume you're going to keep a dead alien in formaldehyde?

groucho

Original Poster:

12,134 posts

264 months

Friday 12th March 2010
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It's not a bad idea. biggrin As to Z4's comment, isn't that what the floorboards do? The only reason I put the board beneath was to stop the tank cutting through the carpet.

Cheers.