Q4-3 Is the permitted retaining wall safe against earthquakes?

Since the disaster assumed by the Old Residential Land Development Regulation Law is considered to be a normal disaster such as the torrential rainfalls, the retaining wall provided based on the corresponding standard is safe against earthquakes that are abnormal disasters. I can't say that retaining walls built after the enforcement of the law in the Great Hanshin-Awaji Earthquake almost never collapsed.

Part of the guide on this answer

• Seismic design of retaining walls
  "Guide to Residential Land Development", Part 3, Chapter 3, Section 210

Contact for inquiries regarding this answer

• About permission of construction about residential land development
  Housing and Architecture Bureau Residential Land Examination Department

For specific content in a specific location, please contact the person in charge of each area.