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

Since the disaster assumed by the Old Residential Land Development Regulation Law is considered to be a normal disaster in torrential rainfalls, etc., it can not be said that retaining walls built after the enforcement of the law following the Great Hanshin-Awaji Earthquake have hardly collapsed.

Summary of Guides, etc. on this answer

• Seismic design of retaining walls
  “Guide to Residential Land Development” Part 3, Chapter 3, Section 2, Section 10

Contact for inquiries regarding this answer

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

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