(Revised: 07/17/2015)
Seismic Hazard
Exposure Group 1: All occupancies except those
listed below.
Seismic Hazard
Exposure Group 2: Buildings are those, which have
a substantial public hazard due to occupancy or use, including buildings
containing any one or more of the indicated occupancies:
1.) Use Group A in which more than 300 people congregate in one
room.
2.) Use Group E with an occupant load greater than 250.
3.) Use Group B used for college or adult education with an occupant
load greater than 500.
4.) Use Group I-2 with an occupant load greater than 50, not having
surgery or emergency treatment facilities.
5.) Use Group I-3.
6.) Power generating stations and other public utility facilities
not included in Seismic Hazard Exposure Group 3.
7.) Any other occupancy with an occupant load greater than 5000.
Seismic Hazard
Exposure Group 3: Buildings are those having
essential facilities, which are required for post-earthquake recovery,
including buildings containing any one or more of the indicated occupancies:
1.) Fire or rescue and police stations.
2.) Use Group I-2 having surgery or emergency treatment facilities.
3.) Emergency preparedness centers.
4.) Post-earthquake recovery vehicle garages.
5.) Power-generating stations and other utilities required as
emergency back-up facilities.
6.) Primary Communication facilities.
7.) Highly toxic materials as defined by 780 CMR 307.0 where the
quantity of the material exceeds the exempt amounts of 780 CMR 307.8.
See also: