The Structural Engineer > Archive > Volume 7 (1929) > Issues > Issue 8 > The Structural Aspects of the Great Pyramid (Continued From July, 1929)
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The Structural Aspects of the Great Pyramid (Continued From July, 1929)

To return, however, to the Pyramids on Gizeh Plateau, we find here several smaller pyramids whose respective states of dilapidation repeat the evolutionary history of the larger pyramids. These smaller pyramids not only prove the impossibility of a universal application of the accretion theory, but, in two cases shown on the accompanying sections, indicate an attempt to effect a compromise between the earlier defective sequence of construction and the sequence of construction adopted in the case of the Great Pyramid. In place of the continuous straight joints of the early pyramids, the two small pyramids illustrated (as the Fourth and Sixth Pyramids respectively) have bonded masonry in each step, with the older straight joint of each terraced step face broken by each successive course being slightly set back from the preceding lower course in the vertical ratchet effect shown. The latter provision proved ineffective, as the manner and extent of the dilapidation shows. Obviously the casing and the filling in between the casing and the terraced steps of the core masonry were built after the terraced steps had been completed. Altogether three types of construction are shown on this series of illustrations. The distinctive types are obvious from the dilapidations - after what has been said as to the material facts of Pyramid construction. I may add that I am aware of the part played by the Arabs and others in demolishing the casings of the pyramids. My contention is that such demolition continued to a greater extent where defective construction and the subsequent effects of defective construction offered less resistance to demolition. D. Davidson