Which risk increased when Inca masons constructed trapezoidal window and door openings?

💡 Explanation

Seismic vulnerability increased due to stress concentration; trapezoidal openings create concentrated stress under shear because the geometry focuses forces rather than distributing them evenly. Therefore, structural resistance to earthquakes decreased rather than improving thermal or drainage properties.

• In early cast iron production, which consequence occurred during rapid cooling of large castings?
• Which outcome followed early use of bellows-driven blast furnaces in ancient China to exceed ~1150°C?
• Which angular relationship is corrected for when using an astrolabe to determine the time of day?
• Which stone treatment reduces spalling risks in ancient Inca masonry?
• Within Mughal garden irrigation systems, which outcome resulted from water wheel inefficiency?
• Which outcome results when attempting to use a corroded brass astrolabe?