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Book Contents

Book Index

Risk Category

You choose a Risk Category from I to IV from ASCE-7 Table 1.5-1. The lengthy descriptions in this Table have been summarized in the input choices as Low hazard, All others, Hazardous, and Essential, however structures posing a "substantial" hazard to the community in the event of failure are included in Category IV along with essential facilities.

The Risk Category is used to determine the Importance Factor from Table 1.5-2 and the Seismic Design Category from Tables 11.6-1 and 11.6-2.

See Also

Seismic Site Information

Seismic Force Resisting System

Site Classes

Period T

Response Modification Factor R

Spectral Response Accelerations and Site Coefficients

Deflection Amplification Factor

Irregularities