Planning of the foundation a three-story building constructed on potential liquefaction area in Air Tawar Estuary of Padang City

The e arthquake has become one of the most lethal problems in Indonesia, especially across ring fire zone. On September 30th, 2009, an earthquake with a magnitude 7.6 SR occurred, triggering tsunami and liquefaction. liquefaction potential forces need to be mitigated when happens reduce risk. This study designs building foundation that can endure loads from earthquake, tsunami, Air Tawar estuary Padang City. soil profile identified CPT (Cone Penetration Test) data. After identifying potential, upper structure was designed consider load waves according FEMA P-464 (2012). Afterward, design dimensions based on ultimate structure, wherein amount settlement should smaller than tolerable settlement. method used paper is taking data Estuary. analyzing making ETABS 2016, recapitulate maximum joint reaction withstand load, calculate Thus lower take into account obtained still within tolerance range 9.79 mm, where limit reduction 32m.