Gross floor area gfa the total floor area contained within the building measured to the external face of the external walls.
Floor area to wall area.
The constructed area would include the basic structure walls staircase or lobby space if any.
Generally there are 3 major differences in measuring floor area.
Either wall center wall core center wall core layer or wall finish.
Gross internal area gia the floor area contained within the building measured to the internal face of the external walls.
The floor area ratio is the relationship between the total amount of usable floor area that a building has or has been permitted to have and the total area of the lot on which the building stands.
If the area is 100 square feet for example the width of one wall is 10 feet.
The smaller the ratio the more floorspace is created which in financial terms for a client would be rentable areas building aplan area 35m x 35mheight 35mstorey height 3 5mbuilding bplan area 22 5m x 22 5mheight 24 75mstorey height 2 75mif the floor budget construction cost is 50 m2 and the wall area construction cost 25 m2 calculate the wall to floor ratio for both buildings.
Far is defined as the ratio of a building s total floor area gross floor area to the area of land upon which it is built.
The constructed area would include the basic structure exterior walls staircases or lobby space if any.
Includes the niches that touch the floor and affect the floor area.
Floor to ceiling wall niches revit element niche wall niche with elevation 0 floor to ceiling windows parapet 0 compute room areas at.
It is the ratio of the total floor area of the building compared with the total plot area.
Other codes including local building codes may have a different definition.
As niches are detected.
The ratio is obtained by dividing the total area built by the area of parcel of land upon which it is built.
Step 2 multiply the wall width by four to get the perimeter of the room.
The gross floor area shall not include shafts with no openings or interior courts.