It is divided into the usable area (UA), functional area (FA) and circulation area (CA). The net floor area is intended to include only the area of the room used for a specific purpose and does not include the areas mentioned in the above definition and therefore is not included in the net floor area. Gross Floor Area (GFA) Gross floor area is the total area of the building measured all the way out to the external 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. The sum of all areas on all floors of a building included within the outside faces of its exterior walls, including all vertical penetration areas, for circulation and shaft areas that connect one floor to another. Gross Area and Floor Area are two different fields that are used in two different ways. Let's start at the beginning. Gross Leasable Area (GLA) : The total floor area designed for tenant occupancy and exclusive use, including any basements, mezzanines, or upper floors, expressed in square feet and measured from the centerline of joint partitions and from outside wall faces. The floor space (FS) of a building represents the size of the building, such as GFA and LFS. Net floor area is the internal room space between face of walls. Gross Floor Area is 0 ft2 – Your property Gross Floor Area must be larger than 0 ft2. The net floor area (NFA) includes the area of usable areas of all floor plan levels located between rising components of the building. Saleable floor area include full thickness of external walls, half thickness of walls shared with other units, internal … What does Gross Floor Area (GFA) and Lettable Floor Space (LFS) mean? In other countries Gross floor area meaning is like Hong Kong’s Saleable area. You can also create one on the Details tab. 3.2.1 Gross Area (Gross Square Feet—GSF) (See figure 3-2 below) Definition. The main difference between Gross Area and Floor Area is that Gross Area may have an impact on loss estimates while Touchstone does not currently use Floor Area in any loss calculations. In other words, it’s the total footprint of the building, multiplied by the number of floors. Property has no uses – Each property must have at least one Property Use (ex: Office, Retail, K-12 School). The gross floor area is divided into the net floor area and the construction floor area. The Gross Floor Area is defined by the 2018 International Building Code as: The floor area within the inside perimeter of the exterior walls of the building under consideration, exclusive of vent shafts and courts, without deduction for corridors, stairways, ramps, closets, the thickness of interior walls, columns or other features. Floor area is expressed in square meters (m²). 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