ANALYSIS OF MEDIUM RISE BUILDINGS AT MEXICO CITY WITH A SOFT AND WEAK FIRST STORY CONFIGANALYSIS OF MEDIUM RISE BUILDINGS AT MEXICO CITY WITH A SOFT AND WEAK FIRST STORY CONFIGURATIONANALYSIS OF MEDIUM RISE BUILDINGS AT MEXICO CITY WITH A SOFT AND URATION. RIIE. 2022;27(2):255-295. doi:10.24133/riie.v27i2.2879