I would just get it installed so you know it is done right but they have a graph to help you here http://www.raisedfloorliving.com/floorframing.shtml
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FAR=Total floor area of building / Total lot area
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Plot ratio, also known as floor area ratio (FAR), is calculated by dividing the total floor area of a building by the total area of the plot of land on which it stands. The formula is: [ \text{Plot Ratio} = \frac{\text{Total Floor Area}}{\text{Plot Area}} ] For example, if a building has a total floor area of 10,000 square feet and is situated on a plot of land that measures 5,000 square feet, the plot ratio would be 2.0. This metric is often used in urban planning to regulate building density.
Floor Area Ratio
whether balcony is included in FAR
The Floor Area Ratio (FAR) or Floor Space Index (FSI) is the ratio of the total floor area of buildings on a certain location to the size of the land of that location, or the limit imposed on such a ratio.As a formula: Floor Area Ratio = (Total covered area on all floors of all buildings on a certain plot)/(Area of the plot)Thus, an FSI of 2.0 would indicate that the total floor area of a building is two times the gross area of the plot on which it is constructed, as would be found in a multiple-story building.
The floor area ratio (FAR) or floor space index (FSI) is the ratio of the total floor area of buildings on a certain location to the size of the land of that location, or the limit imposed on such a ratio.As a formula: Floor area ratio = (Total covered area on all floors of all buildings on a certain plot)/(Area of the plot)Thus, an FSI of 2.0 would indicate that the total floor area of a building is two times the gross area of the plot on which it is constructed, as would be found in a multiple-story buildingHope this helps
Signal to noise ratio is the difference between the noise floor and the reference level.
Land coverage and floor area ratio are both determined by square footage. For example, most landscaping or ground clearing isn't permitted on SQ ft bases. A house floor tile , wood, or seamless flooring is determined by sq. ft.
The Floor-Area Ratio (FAR) indicates the total building floor area relative to the size of the lot. If the FAR is 8, it means the total floor area of the building can be up to eight times the area of the lot. To determine the number of floors, you would need to know the height of each floor. For example, if each floor is 10 feet high, you could have a building with a total height that accommodates multiple floors up to the limit set by the FAR.
the p/a ratio is the sum of the perimeter divided by the area therefore if perimeter is 20m and the area 25m2 the sum is 20/25=0.8