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Live loads are those produced by the use and occupancy of the building or other structure and do not include environmental loads such as wind load, snow load, rain load, or dead load.
(a) Required Live Loads. The live loads assumed in the design of buildings and other structures shall be the maximum loads likely to be produced by the intended use or occupancy but shall in no case be less than the minimum uniformly distributed unit loads required by Table 13-52-090 set out in this section, reduced as appropriate in accordance with Section 13-52-210, or the concentrated loads required by Table 13-52-130 as set out in Section 13-52-130.
Occupancy
| Minimum Live Loads (pounds per square foot)
|
Occupancy
| Minimum Live Loads (pounds per square foot)
| |||
A. | Residential Units. | |||
(a) | Dwelling units or sleeping rooms | 40 | ||
(b) | Public rooms | 100 | ||
(c) | Public kitchens | 75 | ||
(d) | Corridors | |||
(1) | Serving dwelling units and sleeping rooms only | 40 | ||
(2) | Serving public rooms | 100 | ||
(e) | Public stairways | 100 | ||
(f) | Balconies (exterior) | 100 | ||
(g) | Porches | 100 | ||
(h) | Decks | 100 | ||
B. | Institutional Units. | |||
(a) | Operating rooms, laboratories | 60 | ||
(b) | Private rooms and wards | 40 | ||
(c) | Kitchens | 100 | ||
(d) | Public spaces | 100 | ||
(e) | Corridors | |||
(1) | First floor | 100 | ||
(2) | Above first floor | 80 | ||
C-1. | Large Assembly Units And C-2 – Small Assembly Units. | |||
(a) | Auditoriums, theaters and assembly halls | |||
(1) | Fixed seats | 60 | ||
(2) | Movable seats | 100 | ||
(3) | Projection room | 100 | ||
(4) | Stage floor | 150 | ||
(5) | Dressing rooms | 40 | ||
(6) | Gridiron floor grating | 60 | ||
(b) | Armories and drill rooms | 150 | ||
(c) | Courtrooms | 75 | ||
(d) | Dancehalls, gymnasiums and dining rooms | 100 | ||
(e) | Libraries | |||
(1) | Reading rooms | 60 | ||
(2) | Stack rooms | |||
Note 1 but not less than | 150 | |||
(f) | Kitchens | 100 | ||
(g) | Aisles, corridors, lobbies, stairways and other public space | 100 | ||
C-3. | Schools. | |||
(a) | Classrooms | 40 | ||
(b) | Laboratories | 75 | ||
(c) | Shops | 100 | ||
(d) | Corridors | |||
(1) | First floor | 100 | ||
(2) | Above first floor | 80 | ||
(e) | Stairways | 100 | ||
D. | Open-Air Assembly Units. | |||
All structures | 100 | |||
Grandstands, stadiums and arena bleachers | ||||
Note 2 but not less than | 100 | |||
E. | Business Units. | |||
(a) | Offices – Note 3 but not less than | 50 | ||
(b) | Lobbies | 100 | ||
(c) | Laboratories | 100 | ||
(d) | Public rooms | 100 | ||
(e) | Corridors | |||
(1) | First floor | 100 | ||
(2) | Above first floor same as occupancy served | |||
F. | Mercantile Units. | |||
Retail | 100 | |||
Wholesale | 125 | |||
G. | Industrial Units. | |||
Light manufacturing | 125 | |||
Heavy manufacturing | 250 | |||
H. | Storage Units. | |||
(a) | Garages and parking facilities for passenger cars only | |||
(1) | Parking floor | 50 | ||
(2) | Roofs when used for parking (includes snow loads) | 75 | ||
(3) | Roofs and all other principal load- carrying elements when used in combination as a deck | 100 | ||
(b) | Light storage | 125 | ||
(c) | Heavy storage | 250 | ||
I. | Hazardous Use Units. | |||
Light manufacturing | 125 | |||
Heavy manufacturing | 125 | |||
J. | Miscellaneous. | |||
(a) | Private garages: roofs and all other principal load-carrying elements when used in combination as a deck | 100 | ||
General All Occupancies. | ||||
(a) | Corridors | |||
(1) | First floor | 100 | ||
Other floors same as occupancy served except as indicated. | ||||
(b) | Balconies (exterior) | 100 | ||
(c) | Decks (patio and roof) | 100 | ||
(d) | Fire escapes | 100 | ||
(e) | Marquees and canopies | 75 | ||
(f) | Sidewalks, vehicular driveways, and yards, subject to trucking Note 4 | 250 | ||
(g) | Stairs and exit ways except as indicated | 100 | ||
(h) | Walkways and elevated platforms other than exit ways | 60 | ||
(i) | Yards and terraces (pedestrian) | 100 | ||
Notes For Table 13-52-090. | ||||
Note 1 – The weight of books and shelving shall be computed using an assumed density of 65 lb/ft3 (pounds per cubic foot, sometimes abbreviated pcf) and converted to a uniformly distributed load; this load shall be used if it exceeds 150 lb/ft2. | ||||
Note 2 – For detailed recommendations, see American National Standard for Assembly Seating, Tents, and Air-Supported Structures, A.N.S.I. / N.F.P.A. 102-1978. | ||||
Note 3 – File and computer rooms shall be designed for heavier loads based on anticipated occupancy. | ||||
Note 4 – American Association of State Highways and Transportation Officials. A.A.S.H.T.O. axle loads should also be considered where appropriate. Refer to Section 13-52-180, special loading. | ||||
(Prior code § 68-2.2; Added Coun. J. 11-29-89, p. 8387; Amend Coun. J. 10-1-03, p. 9163, § 4.2)