A. The design for all buildings and other structures shall conform to good engineering practice. The following tables give the minimum uniform live loads in pounds per square foot which shall be used in the design of buildings, except that the specified live loads (but not the roof or sidewalk loads) may be reduced by twenty percent (20%) in buildings of fireproof construction:
Type Of Building
|
Pounds Per Square Foot
|
Type Of Building
|
Pounds Per Square Foot
|
Theaters, assembly halls and other places of assemblage: | |
Auditoriums with fixed seats | 70 |
Lobbies, passageways, stairways and auditoriums or places of assemblage without fixed seats | 100 |
Dance halls | 100 |
Theater stage | 150 |
School buildings, libraries and museums: | |
Classrooms for similar use | 60 |
Corridors, lavatories and similar public parts of the buildings | 80 |
Hotels, dwellings, apartments, and tenement houses, clubhouses, hospitals, and places of detention: | |
Dwellings | 40 |
Private rooms and apartments | 40 |
Public corridors, offices, lobbies, dining rooms, etc. | 80 |
Office buildings: | |
First floor | 100 |
Corridors and other public places above first floor | 80 |
Office space above first floor | 50 |
Grandstands | 100 |
All stairs | 100 |
Garages: | |
All types of vehicles | 100 |
Passenger cars only | 80 |
Workshops, factories and mercantile establishments: | |
Not less than (In warehouses, workshops, factories, and mercantile establishments for the sale, storage or manufacture of heavy merchandise or machinery, the floors shall be designed to carry all loads safely, including the allowance of at least 25% for vibration where vibration occurs.) | 100 |
Roofs | 30 |
Sidewalks (Where the maximum floor load is more than 250 pounds a square foot, the sidewalk abutting the building must be designed to carry safely such maximum load. Concentrated,partial and eccentric loading shall also be provided for.) | 250 |
B. Except in buildings for storage purposes, the following reductions in assumed total live floor loads are permissible in designing the columns, piers, walls, foundations, trusses and girders. Reduction of total live loads carried:
Carrying 1 floor | 0% |
Carrying 2 floors | 10% |
Carrying 3 floors | 20% |
Carrying 4 floors | 35% |
Carrying 5 floors | 40% |
Carrying 6 floors | 45% |
Carrying 7 or more floors | 50% |
C. Building and other structures shall be designed to resist a horizontal wind pressure of twenty (20) pounds on every square foot of surface that is exposed, in addition to the dead loads and the live loads specified above in this Section.
D. If the overturning moment due to wind pressure exceeds seventy five percent (75%) of the moment of stability of the structure due to dead load only, the structure shall be anchored to its foundations, which shall be sufficient weight to ensure the stability of the structure. Sufficient diagonal bracing or rigid connections between the uprights and horizontal structural members shall be provided to resist distortion. (1964 Code § 288)