OCCUPANT LOAD CALCULATION

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Occupant load (definition)

  • The overall number of persons that will occupy a building (or portion thereof), associate degree elevator, etc., at anybody time.
  • The occupant load (OL) is to replicate the maximum variety of individuals anticipated to occupy the building at any given time and under all probable things
  • Occupier Load. the entire number of persons which may occupy a building or portion thereof at any one time.

1) Occupant load calculation for design a building

For determinant the exits needed, variety the amount the quantity of persons inside any floor space or the occupant load shall be supported the particular number of occupants declared, however in no case but that per table below. 

OCCUPANT LOAD CALCULATION

Note – 1

Floor Area (Gross floor area (GFA))
  • The area of the floor within the within perimeter of the outside walls of the floor of the building into account with no deductions for corridors and passageways, stairs, closets, thickness of interior walls, columns, lifts and building shafts or other options.
GROSS FLOOR AREA
Net Floor Area (NFA)
  • The actual occupied space not together with unoccupied accessory areas like corridors, stairways, rest room rooms, mechanical rooms and closets.
NET FLOOR AREA

Note – 2

  • Occupant load in dormitory parts of homes for the aged, orphanages, insane asylums, etc, wherever sleeping accommodation is provided, shall be calculated at not less than 7.5 m2 gross floor area/person.

Note – 3

  • Occupant load in dormitory parts of homes for the aged, orphanages, insane asylums, etc, wherever sleeping accommodation is provided, shall be calculated at not less than 7.5 m2 gross floor area/person.

Note – 3

  • These shall embrace gymnasium, Ping-Pong area, billiard parlor and different gambling rooms, library, athletic facility and like.

Note – 4

  • In case of assembly occupancy having mounted seats, the occupier load shall be determined by multiplying the amount of seats by 1.2.

Note – 5

Car parking areas beneath occupancy aside from storage shall even be 30 M2 per person.

  • The occupier load of a mezzanine floor discharging to a floor below shall be adscititious thereto floor occupancy and the capacity of the exits shall be designed for the total occupancy load therefore established.
  • The occupier load of each story thought-about individually shall be needed to be utilized in computing the number of suggests that of egress at each story, as long as the required variety of suggests that of egress isn’t decreased in the direction of egress travel.
  • The assembly occupancies and call centres shall be required to display, limiting occupant load details positioned in a very conspicuous place close to the doorway of each of such individual occupancy to avoid possible overcrowding  and  overloading.  
  • The  display  shall preferably be engraved on a metal plate of not less than 300 mm × 200 mm, with letters of height and width not less than 50 mm, with detail of occupancy, area and occupancy load (see figure below).
OCCUPANT LOAD CALCULATION FORM
  • The capacity of any open mezzanine/balcony shall be added to the capacity of the floor below for the purpose of determining exit capacity.

Example

FORMULA OF OCCUPANT LOAD CALCULATION

Assume Gross floor area = 500 sq.m. Occupant load factor given above figure. 

Residential = 12.5 sq.m. / person

Educational = 4.0 sq.m. / person 

—–                =  ——–

Occupant load (number of person) 

For Residential = 500/12.5 = 40 persons

For Educational = 500/4 = 125 persons


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