Too late, I'm ending a week in CDMX. The earthquake oriented infrastructure is interesting. Long external horizontal struts are used on buildings that are irreg

Too late, I'm ending a week in CDMX. The earthquake oriented infrastructure is interesting. Long external horizontal struts are used on buildings that are irregular polygons. Often external (or "internal" but outside) staircases are reinforced and joined to the rest of the building. The skycraper architecture starting in the mid-1950s was a proving ground for architectural techniques that were studied internationally, including by Japan.