CEMP-E
TI 809-51
30 September 1999
Table 1-1. Seismic Use Groups
Seismic Use Group
Occupancy or Function of Structure
I. Standard Occupancy Structures
All structures having occupancies or functions not listed above.
II. Special Occupancy Structures
Covered structures whose primary occupancy is public assembly with a capacity
greater than 300 persons*.
Daycare centers with a capacity greater than 150 persons.
th
*ASSSEMBLY AREA GUIDELINES
Educational buildings through the 12 grade with a capacity greater than 250
2
2
persons or 465 m (5,000 ft ) classroom space.
Assembly areas, concentrated (without fixed
2
2
seats) -Single room 195 m (2,100 ft ) or more.
Auditoriums
Buildings for colleges or adult education schools with a capacity greater than 500
2
2
Dance floors
students or 929 m (10,000 ft ) of classroom space.
Churches and chapels
Lobby accessory to assembly occupancy
Lodge rooms
Medical facilities with 50 or more resident incapacitated patients, but not
Reviewing stands
2
2
otherwise designated as Seismic Use Group IIIE facility, or 372 m (4,000 ft ) of
Stadiums
convalescent rooms.
2
2
W aiting area 84 m (900 ft ) or more
Assembly Areas, less concentrated use
Jails and detention facilities.
2
2
Single room 418 m (4,500 ft ) or more
Conference rooms
Lounges
All structures with occupancy capacity greater than 5,000 persons.
Dining rooms
Gymnasiums
Structures and equipment in power-generating stations and other public utility
Drinking establishments
Stages
facilities not included in Seismic Use Group IIIE, and that are required for
Exhibition rooms
continued operation.
W ater treatment facilities required for primary treatment and disinfecting of
potable water.
W astewater treatment facilities required for primary treatment.
Facilities having high value equipment, when justification is provided by the using
agency.
III H. Hazardous Facilities
Structures housing, supporting or containing sufficient quantities of toxic or
explosive substances to be dangerous to the safety of the general public if
released.
1
III E. Essential Facilities
Facilities involved in handling or processing sensitive munitions, nuclear
weaponry or materials, gas and petroleum fuels, and chemical or biological
Facilities involved in operational missile control, launch, tracking or other critical
defense capabilities.
Mission-essential and primary communication or data handling facilities.
Hospitals and other medical facilities having surgery and emergency treatment
areas.
Fire, rescue, and police stations.
Designated emergency prepared centers.
Designated emergency operations centers.
Designated emergency shelters.
Power-generating stations or other utilities required as emergency back-up
facilities for Seismic Use Groups IIIE facilities.
Emergency vehicle garages and emergency aircraft hangars.
Designated communications centers.
Aviation control towers and air traffic control towers.
W aste treatment facilities required to maintain water pressure for fire
suppression.
1
Essential facilities are those structures that are necessary for emergency operations subsequent to a natural disaster.
1-4
Previous Page
