The Great Pyramid is built as mass, not span
node
The pyramid at Giza is completed in the reign of Khufu. Structurally it is the opposite of everything that follows in this Journey: it encloses almost no space, and its interior voids are managed with corbelling and stacked relieving chambers rather than with any spanning device. The Grand Gallery is corbelled; the burial chamber ceiling is a stack of granite beams with a corbelled gable above to divert the load. It is the tallest structure built by human beings for roughly 3,800 years, and it achieves that by piling material, which is a solution available to any society with enough labour and no engineering theory at all.
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