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NEHRP Site Class

Site Classifications taken from Table 1615 1.1 Site Class Definitions published in
2000 International Building code, International Code Council, Inc. on page 350.


Table 1615 1.1 Site Class Definitions partially reproduced below

Site Class

Soil Profile Name

Average Properties in Top 100 feet
(as per 2000 IBC section 1615.1.5)
Soil Shear Wave Velocity, Vs

Feet/second

Meters/second

A

Hard Rock

Vs > 5000

Vs > 1524

B

Rock

2500 < Vs< 5000

762 <Vs< 1524

C

Very dense soil and soft rock

1200 < Vs < 2500

366 < Vs< 762

D

Stiff soil profile

600 < Vs< 1200

183 < Vs< 366

E

Soft soil profile

Vs < 600

Vs < 183


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