The number of occupants shall be computed at the rate of one occupant per unit of area as prescribed in Table 1004.1.2. For areas without fixed seating, the occupant load shall be not less than that number determined by dividing the floor area under consideration by the occupant load factor assigned to the function of the space as set forth in Table 1004.1.2. Where an intended function is not listed in Table 1004.1.2, the building official shall establish a function based on a listed function that most nearly resembles the intended function.
Exception: Where approved by the building official, the actual number of occupants for whom each occupied space, floor or building is designed, although less than those determined by calculation, shall be permitted to be used in the determination of the design occupant load.
|FUNCTION OF SPACE||OCCUPANT LOAD FACTORa|
|Accessory storage areas, mechanical
|Agricultural building||300 gross|
|Aircraft hangars||500 gross|
|Baggage claim||20 gross|
|Baggage handling||300 gross|
|Waiting areas||15 gross|
|Gaming floors (keno, slots, etc.)||11 gross|
|Exhibit gallery and museum||30 net|
|Assembly with fixed seats||See Section 1004.4|
|Assembly without fixed seats|
(chairs only‒not fixed)
|Standing space||5 net|
|Unconcentrated (tables and chairs)||15 net|
|Bowling centers, allow 5 persons for
each lane including 15 feet of runway,
and for additional areas
|Business areas||100 gross|
|Courtrooms‒other than fixed seating
|Day care||35 net|
|Classroom area||20 net|
| Shops and other vocational room
|Exercise rooms||50 gross|
|Group H-5 Fabrication and manufacturing areas||200 gross|
|Industrial areas||100 gross|
|Inpatient treatment areas||240 gross|
|Outpatient areas||100 gross|
|Sleeping areas||120 gross|
|Kitchens, commercial||200 gross|
|Reading rooms||50 net|
|Stack area||100 gross|
|Locker rooms||50 gross|
|Mall buildings‒covered and open||See Section 402.8.2|
|Storage, stock, shipping areas||300 gross|
|Parking garages||200 gross|
|Skating rinks, swimming pools|
|Rink and pool||50 gross|
|Stages and platforms||15 net|
For SI: 1 square foot = 0.0929 m2, 1 foot = 304.8 mm.
a. Floor area in square feet per occupant.
The occupant load of wheelchair spaces and the associated companion seat shall be based on one occupant for each wheelchair space and one occupant for the associated companion seat provided in accordance with Section 1108.2.3.
For areas having fixed seating without dividing arms, the occupant load shall be not less than the number of seats based on one person for each 18 inches (457 mm) of seating length.
The occupant load of seating booths shall be based on one person for each 24 inches (610 mm) of booth seat length measured at the backrest of the seating booth.