Floor Area Per Occupant Net Vs Gross

Factors are based on either gross or net floor area.

Floor area per occupant net vs gross.

Floor gross square feet fgsf and building gross square feet bgsf represent the overall footprint of a floor or building respectively and include shared public corridors and atriums elevators stairs the space occupied by the building s exterior wall and major mechanical spaces which generally account for an additional 20 to 30. For classrooms both the ibc and nfpa 101 list an occupant load factor of 20 net square feet per person. The actual occupied area not including unoccupied accessory areas. What is the difference between a net and a gross occupant load factor.

Table 1004 1 2 maximum floor area allowances per occupant. The gross floor area shall not include shafts with no openings or interior courts. The floor area within the inside perimeter of the exterior walls of the building under consideration exclusive of vent shafts. The floor area of a building or portion thereof not provided with surrounding exterior walls shall be the usable area under the horizontal projection of the roof or floor above.

Floor area in sq. Gross floor area is measured within the inside surface of the walls and includes all occupiable and nonoccupiable spaces. For classrooms both the ibc and nfpa 101 list an occupant load factor of 20 net square feet per person. Commercial office floor area calculation methods.

A gross factor is applied to the entire floor area including the area occupied by interior walls corridors columns fixed furnishings shafts and the like. You will notice that some of the factors are calculated using net and others gross. The occupant load factor is the maximum floor area allowed per occupant as displayed in table 1004 1 2. Occupant load is the calculated number of people or the actual number whichever is greater.

Gross floor area is measured within the inside surface of the walls and includes all occupiable and nonoccupiable spaces.