Floor Area Calculation For Occupancy

Nonoccupiable spaces like corridors stairs bathrooms electrical mechanical rooms closets and fixed equipment are subtracted from the total area to determine the net floor area.

Floor area calculation for occupancy. Measure only the area where people will sit or stand. If you have a room that is shaped irregularly separate the room into square portions for ease of measurement. The occupant load of any space shall include the occupant load of all spaces that discharge through it in order to gain access to an exit. Where data regarding the sq.

Occupancy rate is maximum numbers of persons per area unit. Calculate the occupancy load using the following formula. The code formulates the number of exits based on the number of occupants in the office. When calculating occupancy we do not use one calculation for the entire building we need to apply the occupancy rules for each of the various areas to attain accurate calculations.

Call center 50 ft x 25 ft 1 250 ft 2 1 250 ft2 50 ft2 per person 25 people. The occupant load factors used for each room come from table 7 3 1 2 in nfpa 101 life safety code. To calculate the net floor area of the classroom. When an occupant load factor is based on the net floor area the calculation is based on the actual occupied area.

If the minimum area per person is 100 sq ft the occupation rate is 1 100 0 01 person per sq ft or 10 persons per 1000 sq ft. For example if you want to find the maximum occupancy of a bar measure only where patrons will stand and not the area behind the bar. Floor area occupant load factor occupancy load for office. Calculate a basic estimation of a room s maximum occupancy by dividing the available floor space in square feet by 36.

To calculate a room s maximum occupancy determine factors such as the area of the room the available space in the room the number of useful exits and the height of the ceiling. The floor area within the inside perimeter of the exterior walls of the building under consideration exclusive. For instance the chart dictates that dormitories require 50 square feet of floor area for every room occupant. Units of area per person for specific buildings can be found in the chart at the end of this article.

The occupancy load is calculated by dividing the area of a room by its prescribed unit of area per person. Determine the number of exits needed by determining the number of occupants in the office. 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.