Depends upon the floor. A 200 gal tank will weigh about 1600 pounds. If your floor is a concrete slab, should be no problem. If a floor in a pier and beam constructed house, then doubtful unless there is a lot of extra support put in under the tank.
For example, a 125 gallon tank, on a wooden stand, placed perpendicular to the joists up against a bearing wall, will often be okay without any additional structural support. If your tank is over 125 gallons, then it is likely that you should consider adding supports under your wood framed floor.
Floors are usually designed for a nominal 30psf to 40 psf live load. Example: a 10x10′ room designed for 30 psf can handle 3,000 pounds of people, evenly distributed across it.
As a general rule of thumb, raised floors found in a typical home are built to support a minimum of 40 pounds of live load (i.e., the weight of non-structural objects such as furniture, fixtures, and appliances) per square foot.
For residential floors, the live load is usually considered to be 30 to 40 pounds per square foot (psf), although this varies depending on the location within the home. First-floor live loads have higher requirements than second-floor live loads (40 pounds per square foot vs. 30 psf).
RAISED FLOOR LOADING CAPACITY
How Much Weight Can a Raised Access Floor Hold? The weight load capacity range for standard raised access flooring ranges from 950 pounds - 1250 pounds.
Excessive Weight on a Floor
For example, a floor of an office building is generally designed to hold a lot more weight than a floor in a residential home. However, if load-bearing supports are not installed properly, this can cause a floor to collapse.
Safety factor is a measurement with which your floor was designed to support loads without collapsing. Most homes have a safety factor of 40 PSF (pounds per square foot).
Construction Code specifies “Live Loads” 40 pounds per square foot. It also specifies a deflection of the floor joist. If your floor has a 16 foot span between load bearing walls, and the floor joists are spaced at 16 inches, and the joists are 2x12's you are allowed at that load to deflect 0.52 inches.
However, as a general guideline, a 2x8 wood beam can typically support a maximum uniformly distributed load of around 50 pounds per linear foot (PLF). So, for example, if the beam span is 10 feet, the maximum weight it can support is around 500 pounds (10 ft x 50 PLF).
One 2x12 can support about 180 lbs. per foot or about 2,100 lbs. total for a 12' span. However, the code allows increases for short duration loading, (i.e.: snow loading less than 7 days, etc.)
Larger aquariums should be placed on a stand built specifically for that purpose. Aquariums of 100 gallons or larger should also be placed on a load bearing wall or sturdy flooring, preferably on the ground floor or basement.
The building code requires the residential floor to be able to support a 40 psf (pounds per square feet) live load. For your safe that weighs 300lbs, it requires a footprint that covers an area of 300/40 = 7.5 SF (square feet).
Floors that sag 2 inches or more in 20 feet, though, are a cause for concern. Additional indicators of a significant problem include: Foundation cracks. Differential settlement of foundation or slab.
If the floor sags more than a few inches, it may collapse completely, putting everyone in your house in danger. Sagging floors can also cause misalignment of doors and windows, making them harder to open and close. Sagging floors can even crack the walls of your home in extreme circumstances.
You will notice the floors sloping to one side, or sagging in the center. The floor may feel oddly bouncy or soft, or have high and low places. These are all signs of a deteriorating floor structure. But even if your main beam falls down, it won't immediately take out the entire floor.
You can tell if a floor will collapse by looking at the floors for foundation damage (cracks, uneven floors, bowing, etc.), but the warning signs can also appear as cracks in walls or window frames.
Drawbacks of Raised Access Flooring
Additional cost when occupying space, on the order of $20-$40 per square foot for design, materials, and installation. The flooring will sometimes require underfloor fire protection, depending on local codes.
If you want to raise the height of a floor, the cheapest and easiest way is to add a thick underlayment designed for the job. There are other options too like adding a framed wooden subfloor or floor leveling compound before installing new flooring.
Raised Floor Panels come in several thicknesses (like 30 mm, 40 mm, and others too). Moreover, they come in different dimensions: 600×600 mm. 600×400 mm.