FIGURE 16-2FIGURE 16-2

1997 UNIFORM BUILDING CODE

2–37

4

30 100 300

MILES

200

4

PUERTO RICO

GUAM

33

2A

ALASKA

ALEUTIANISLANDS

1

1

1

1

1

1

1

2A3

3

3

3

3

3

4

4

4

4

0

0

0

0

0

2A

2B

2B

2A 2B

2B

2B

2A

2B

2B

2B

1

1

3

0

1

2A

2A

2A

1

0

4

1

4

OAHUMAUI

HAWAII

KAUAI

3

TUTUILA3

3

0

3

2B

1

FIGURE 16-2—SEISMIC ZONE MAP OF THE UNITED STATESFor areas outside of the United States, see Appendix Chapter 16.

FIGURE 16-3FIGURE 16-3

1997 UNIFORM BUILDING CODE

2–38

2.5Ca

SP

EC

TR

AL

AC

CE

LER

AT

ION

(g�

s)

Cv/T

Ca

To Ts

CONTROL PERIODSTs = Cv/2.5Ca

To = 0.2Ts

PERIOD (SECONDS)

FIGURE 16-3—DESIGN RESPONSE SPECTRA