Help with floor support for my tank build

[ronp327]

Hey everyone,
I have about 2 months till my house will be ready.
I am having a modular built and i will have a room a little wider than 13'x13'
the floor joist are 2x10's 16" on center that span the 13' space.
the outside walls will be tripple banded.
it will sit on a crawl space.
My plan is to build a plywood tank 8'x4'x3' so rounded up 720 gallons.

let me know if these calculations are right but here is what i came up with.
8'x4' = 32 sq ft.
720 gallons times 10 pounds rounded up is 7,200 pounds.
so 7,200 pounds % by 32 sq ft = 225 pounds per sq ft.
So my first question is how would you go about reinforcing the floor to hold all the extra weight?
I was thinking about pouring 3 concrete columns under the front edge of the tank and then going to the middle and back and place several Ellis Floor Joist Support jacks on a concrete block with a 6x6 spanning across the floor joist. any thoughts on this?
I wanted a basement to put my tank in but it was just not possible since my land was so flat and all the additional cost involved with that. So now i need to figure out how to make this work over my crawl space.
The tank size is the largest in length i can put in the house but the width can be wider if needed. the wider it is the more it weighs but it still should lower the pounds per sq ft (i think)

 

[jwalkerafc7]

im sure you know the larger the floor space that the tank takes up the better because that will distribute the weight to a larger area. what i did with mine, which is also a modular, is went under the house and measured how far and where the braces for the underside of the house are. i ended up putting my tank directly on top of a brace or floor "stud" if you will. but with that much weight i would do some kind of bracing. it could be as simple as putting 4x4's underneath where the tank is going to be and putting alot so it takes the pressure off the floor because with that much weight it could possibly make the floor bend or sink sleightly. regardless i wouldnt play around with that much weight because its better to be safe than sorry, i wouldnt want a huge tank with my precious fish falling through the floor! good luck man, keep us posted!

 

[Piscine]

I can't think of a single way to reinforce that floor without taking significant risks with both water damage, and structural damage. If you really want a tank that big, the best thing to do would be to make a small addition to your home with an on the ground foundation. This is my opinion based on my experience in the lumber industry, and also based on my experience in framing done under my own home. Good luck.

 

[Rev_Jim_Jones]

Rough Numbers for Northern Hem-fir No 2 Lumber, the Numbers For No 1 Lumber are better

2x10 No 2 Lumber @ 13' can hold a Live load of 60lbs a Square foot
2x10 No 2 Lumber @ 12' 10" can Hold a 90 Lbs Square Foot Live Load

Note I am not an Engineer, just a carpenter with a Joist App on my Phone

Hey everyone,
I have about 2 months till my house will be ready.
I am having a modular built and i will have a room a little wider than 13'x13'
the floor joist are 2x10's 16" on center that span the 13' space.
the outside walls will be tripple banded.
it will sit on a crawl space.
My plan is to build a plywood tank 8'x4'x3' so rounded up 720 gallons.

let me know if these calculations are right but here is what i came up with.
8'x4' = 32 sq ft.
720 gallons times 10 pounds rounded up is 7,200 pounds.
so 7,200 pounds % by 32 sq ft = 225 pounds per sq ft.
So my first question is how would you go about reinforcing the floor to hold all the extra weight?
I was thinking about pouring 3 concrete columns under the front edge of the tank and then going to the middle and back and place several Ellis Floor Joist Support jacks on a concrete block with a 6x6 spanning across the floor joist. any thoughts on this?
I wanted a basement to put my tank in but it was just not possible since my land was so flat and all the additional cost involved with that. So now i need to figure out how to make this work over my crawl space.
The tank size is the largest in length i can put in the house but the width can be wider if needed. the wider it is the more it weighs but it still should lower the pounds per sq ft (i think)

 

[ronp327]

The house has a center run of concrete columns that the mate walls sit on.
They are going to pour me 2 more piers where the front of the tank will sit
So the front of the tank will sit on a tripple 2x10 and 3 solid concrete pillars.
If I had them pour 3 more at the back of the tank and possibly one right in the middle would this
Take alot of the weight from the floor and distribute to the pillars?

 

[Rev_Jim_Jones]

A bad Drawing would help too....
You really need an engineer for this, I am pretty rusty on any load bearing that does not involve Scaffolding or Shoring and Aluminum Stringers or Junior Beams.

 

[Piscine]

What is the area of the base of the pillars, and how far into the ground will they reach? You are still going to have to deal with the settling issue depending on what type of ground you are on...

I'm with Jim Jones on this one. For something that involves the weight of a komatsu d21 dozer, I'd call an engineer.

 

[Rev_Jim_Jones]

What is the area of the base of the pillars, and how far into the ground will they reach? You are still going to have to deal with the settling issue depending on what type of ground you are on...

I'm with Jim Jones on this one. For something that involves the weight of a komatsu d21 dozer, I'd call an engineer.

yeah I was going to go there but not for something that Size.