The Great Pyramid of Giza, a well known ancient construction on the outskirts of Cairo, contains two principal chambers within its internal architecture, commonly known as the 'King's Chamber' and the 'Queen's Chamber'. The location of these chambers is known only from surveying measurements because no discernible architectural system which could determine the location of the chambers relative to the ground level of the pyramid has so far been discovered.

In this paper it is shown that these two chambers of the pyramid are connected to each other by a logical stack of interlocking dimensions. Furthermore, this 'chamber stack' is shown to start at the ground level of the building and continue up through the architecture to the ceiling of the roof chamber above the upper chamber.

The unit of measurement that was used in the construction of the Great Pyramid is already firmly established as being the cubit with a length of 0.523 meters and in this paper, by uncovering the chamber stack in the architecture and the logical system by which it was designed, a secondary unit of architect's measurement is discovered.

Using this secondary unit of measure the exact positions of the two chamber's floors and roofs, and the inherent design which determines their vertical position relative to ground level is documented and in so doing, the need to refer to surveying measurements to determine the vertical location of many of the internal architectural features of the pyramid is removed