Category

Description of Buildings and Structures

C

A

Essential facilities and buildings that must function during and after an earthquake
(hospitals & fire stations, electric power plants, etc.).
Large buildings and structures
(buildings over 20 stories high, bridges with spans larger than 50 m, large tanks and water treatment facilities, etc.).
Important state buildings and historical structures
(monuments, museums. etc.).
Facilities for production or storage of toxic materials.
National or regional communications centers.
Dams over 80 m high or with large reservoirs.

1.5

B

Large tanks or water treatment plants.
Public and residential buildings up to 20 stories high.
Buildings for assembly of large numbers of people
(schools, universities, hotels, department stores, etc.).
Structures not included in Category A, C or D.

1.0

C

Secondary buildings and other structures
(warehouses, auxiliary industrial buildings, farm buildings for animals, etc.).
Small dams, bridges, power plants, substations.

0.75

D

Temporary buildings and structures

0