(Effective until July 1, 2020)

PDFWAC 51-50-1004

Section 1004.

Table 1004.1.2, Maximum Floor Area Allowances
Table 1004.1.2
Maximum Floor Area Allowances Per Occupant
FUNCTION OF SPACE
OCCUPANT LOAD FACTORa
Accessory storage areas, mechanical equipment room
300 gross
Agricultural building
300 gross
Aircraft hangars
500 gross
Airport terminal
 
 
Baggage claim
20 gross
 
Baggage handling
300 gross
 
Concourse
100 gross
 
Waiting areas
15 gross
Assembly
 
 
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
 
 
Concentrated (chairs only - Not fixed)
7 net
 
Standing space
5 netb
 
Unconcentrated (tables and chairs)
15 net
Bowling centers, allow 5 persons for each lane including 15 feet of runway, and for additional areas
7 net
Business areas
100 gross
Courtrooms - Other than fixed seating areas
40 net
Day care
35 net
Dormitories
50 gross
Educational
 
 
Classroom area
20 net
 
Shops and other vocational room areas
50 net
Exercise rooms
50 gross
Group H-5 - Fabrication and manufacturing areas
200 gross
Industrial areas
100 gross
Institutional areas
 
 
Inpatient treatment areas
240 gross
 
Outpatient areas
100 gross
 
Sleeping areas
120 gross
Kitchens, commercial
200 gross
Library
 
 
Reading rooms
50 net
 
Stack area
100 gross
Locker rooms
50 gross
Mall buildings - Covered and open
See Section 402.8.2
Mercantile
60 gross
 
Storage, stock, shipping areas
300 gross
Parking garages
200 gross
Residential
200 gross
Skating rinks, swimming pools
 
 
Rink and pool
50 gross
 
Decks
15 gross
Stages and platforms
15 net
Warehouses
500 gross
For SI: 1 square foot = 0.0929 m2, 1 foot = 304.8 mm.
a
Floor area in square feet per occupant.
b
The occupant load factor for fixed guideway transit and passenger rail systems shall be 15 net in accordance with NFPA 130.
1004.2 Increased occupant load. The occupant load permitted in any building, or portion thereof, is permitted to be increased from that number established for the occupancies in Table 1004.1.2, provided that all other requirements of the code are also met based on such modified number and the occupant load does not exceed one occupant per 7 square feet (0.65 m2) of occupiable floor space. Where required by the building official, an approved aisle, seating or fixed equipment diagram substantiating any increase in occupant load shall be submitted. Where required by the building official, such diagram shall be posted. See WAC 170-295-0080 (1)(b) for day care licensed by the state of Washington.
[Statutory Authority: RCW 19.27.031 and 19.27.074. WSR 19-02-038, § 51-50-1004, filed 12/26/18, effective 7/1/19; WSR 16-03-064, § 51-50-1004, filed 1/19/16, effective 7/1/16.]
(Effective July 1, 2020)

PDFWAC 51-50-1004

Section 1004—Occupant load.

Table 1004.5, Maximum Floor Area Allowances Per Occupant
Table 1004.5
Maximum Floor Area Allowance Per Occupant
FUNCTION OF SPACE
OCCUPANT LOAD FACTORa
Accessory storage areas, mechanical equipment room
300 gross
Agricultural building
300 gross
Aircraft hangars
500 gross
Airport terminal
 
 
Baggage claim
20 gross
 
Baggage handling
300 gross
 
Concourse
100 gross
 
Waiting areas
15 gross
Assembly
 
 
Gaming floors (keno, slots, etc.)
11 gross
 
Exhibit gallery and museum
30 net
 
Billiard table/game table area
50 gross
Assembly with fixed seats
See Section 1004.6
Assembly without fixed seats
 
 
Concentrated (chairs only - not fixed)
7 net
 
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
7 net
Business areas
 
 
Concentrated business use areas
150 gross (See Section 1004.8)
Courtrooms - Other than fixed seating areas
40 net
Day care
35 net
Dormitories
50 gross
Educational
 
 
Classroom area
20 net
 
Shops and other vocational room areas
50 net
Exercise rooms
50 gross
Group H-5 fabrication and manufacturing areas
200 gross
Industrial areas
100 gross
Institutional areas
 
 
Inpatient treatment areas
240 gross
 
Outpatient areas
100 gross
 
Sleeping areas
120 gross
Kitchens, commercial
200 gross
Library
 
 
Reading rooms
50 net
 
Stack area
100 gross
Locker rooms
50 gross
Mall buildings - Covered and open
See Section 402.8.2
Mercantile
60 gross
 
Storage, stock, shipping areas
300 gross
 
Group M art gallery
30 gross
Parking garages
200 gross
Residential
200 gross
Skating rinks, swimming pools
 
 
Rink and pool
50 gross
 
Decks
15 gross
Stages and platforms
15 net
Warehouses
500 gross
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
a
Floor area in square feet per occupant.
[Statutory Authority: RCW 19.27.031 and 19.27.074. WSR 20-01-090, § 51-50-1004, filed 12/12/19, effective 7/1/20; WSR 19-02-038, § 51-50-1004, filed 12/26/18, effective 7/1/19; WSR 16-03-064, § 51-50-1004, filed 1/19/16, effective 7/1/16.]