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Geoenvironmental Disasters

Table 1 Standard site classifications schemes according to the NBCC and Eurocode 8

From: Seismic microzonation of a region with complex surficial geology based on different site classification approaches

Code

Site class and VS,30 (m/s)

A

B

C

D

E

NBCC (NEHRP)

> 1500(*)

760–1500(*)

360–760

180–360

< 180

Eurocode 8

> 800(**)

360–800

180–360

< 180

(***)

  1. *Soft soil must be < 3 m in thickness
  2. **Surface weak materials must be < 5 m
  3. ***VS,avg < 360 m/s and thickness 5 < H < 20 m
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