Specifies the seismic zone, as defined in the following graphic. Select SA, A, B, or C.
Source: Seismic Design Standard for the High Pressure Gas Facilities, MITI Notice No. 515 dated Oct. 26, 1981. METI Amended Notice No. 250 dated Nov 29, 2013. High Pressure Gas Safety Institute of Japan (KHK), Seismic Design Guideline for the High Pressure Gas Facilities to the 2012 edition, newest revision Sep 25, 2015.
The zone determines the zoning factor (β2.).
|
Zone |
Level 1 Earthquake β2 |
Level 2 Earthquake β2 |
|---|---|---|
|
SA |
1.0 |
1.0 |
|
A |
0.8 |
0.8 |
|
B |
0.60 |
0.7 |
|
C |
0.4 |
0.7 |