The pyramid grows layer after layer. (Illustration Teresa (Zubi) Zuberbühler)
We don't know, if the pyramid of Khufu was built, so the stone layers always were rising at the same rate. Construction of the shafts and chambers in the interior had to minutely planned.
Size and placement of the chambers and shafts are after the "Giza plateau mapping project". The stone course actually vary a bit in size (the stones at the bottom are larger), this is not taken in account in this drawing.
Copyright www.cheops-pyramide.ch