Floor reinforcement for unusual floor construction

[Resilient]

I am looking at getting an Innovative Marine 200 gallon peninsula tank. Trying to figure out if it has to go in the lower level on the slab which should be no problem or if it can go in the living room which would be the preference, but is on wood flooring.

The floor construction seems a little unusual from what I am seeing in other posts.

The structure is 4x6" wood girders supported on piers every 7'. The girders are 48" on center and then the subfloor is 2x6" tongue and groove run perpendicular to the girders. The girders run parallel to the direction of the tank which is 30" wide.

I'm going to try to get an engineer out to look at it. If it were a conventional floor I would have a good idea of what I might be expecting from other posts, but since the floor has the unusual construction I am a little less sure what to expect and what I might need to expect to budget for reinforcement.

 

[Resilient]

Here is a picture of the plans. The 4x6" runs in the direction of the red arrow, the tank would roughly be the blue rectangle and the 2x6" T&G runs perpendicular to the 4x6".

 

[TangerineSpeedo]

I would wait for the engineers to chime in, But that seems to me old school warehouse construction. So way plenty strong...

 

[bob88884]

Here is a picture of the plans. The 4x6" runs in the direction of the red arrow, the tank would roughly be the blue rectangle and the 2x6" T&G runs perpendicular to the 4x6".

I assume the tank is 6 ft. It looks like it sits directly on top of the 4x6 and between two piers. That said, it seems like the weight will be right on the 4x6. If it were me, I would get four crawl-space jacks and some 4x4s and set them directly under where the tank will sit. The 4x4s will spread the load. This is overkill, but you will be set and not have to worry. I am not an engineer, but I was a building contractor before I retired. Those jacks are relatively cheap on Amazon.

 

[Resilient]

I assume the tank is 6 ft. It looks like it sits directly on top of the 4x6 and between two piers. That said, it seems like the weight will be right on the 4x6. If it were me, I would get four crawl-space jacks and some 4x4s and set them directly under where the tank will sit. The 4x4s will spread the load. This is overkill, but you will be set and not have to worry. I am not an engineer, but I was a building contractor before I retired. Those jacks are relatively cheap on Amazon.

I ended up getting a structural engineer to look at the plans. I was surprised to find that no matter where I put it, the area that needed reinforcement was the the 4x6" beams. The 2x6" was sufficiently strong.

I did basically what you recommended. Because it ended up centered over one beam, it required two additional posts on cement piers. Had it been centered between two beams, they each would have required one additional post.

Overall, not too bad except I had to lift the posts over some HVAC ducts in the crawl space which was not amazingly fun.