The Grand Gallery has all masonry tilted at the same angle as the King's Chamber itself, with the bottom two courses not corbelled unlike the rest of the structure. The Great Void discovered above by the Scan Pyramids project may represent an interface between the level core masonry and the tilted structure. The King's Chamber is a freestanding structure within the limestone chamber, and shafts penetrating multiple levels are also tilted at the same angle. Climbing the steep Grand Gallery causes vertigo due to the visual perspective.
Grand Gallery construction reveals tilted architecture and potential voids

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Key facts
- Grand Gallery has all masonry tilted at same angle as chamber itself
- Bottom two courses are not corbelled unlike rest of structure
- Great void above Grand Gallery discovered by Scan Pyramids project may be interface between level core masonry and tilted structure
- King's chamber is a freestanding structure within limestone chamber
- Grand Gallery may also contain freestanding relieving structure, much larger than King's Chamber
- Shafts penetrating multiple levels are also tilted at same angle
- Climbing the steep Grand Gallery causes vertigo due to visual perspective
Sources
NOVA Online/Pyramids/Khufu/Upper Grand Gallery/High - PBSpbs.org
... Grand Gallery, which continues upward at the same steep rate of incline all the way to the entrance of the King's Chamber. The gallery is not perfectly ...
The Grand Gallery | Prof's Ancient Egypt | Derek Hitchinsegypt.hitchins.net
The Grand Gallery of the Great Pyramid is some 8.5m high, 47m long, rising at 26.5 degrees (14-seked). It is a masterpiece of the stone mason's art in this, or ...
Grand Gallery (Pyramid of Khufu) - Madain Project (en)madainproject.com
The walls of the Grand Gallery are constructed from fine white Tura limestone, laid in seven corbelled courses. Each successive course projects inward by ...
[PDF] KHUFU'S PYRAMID - The “Inside-Out” construction theory3ds.com
The roofing technique of the Grand Gallery is slightly different from usual corbelling. ... Reinforced masonry beneath the Grand Gallery, beneath the King's ...
The Great Pyramid of Khufu - Guardian's Egypt - Guardian's Egyptguardians.net
A unique ascending passageway leads to a magnificent corbelled gallery, know as the Grand Gallery. ... The chamber is located at the 25th course of masonry. The ...
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