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Reconstruction of the pyramid base

The original baseline, or setting line, marking the foot of the lowest course of casing blocks, is preserved on five foundation slabs of the east side, and seven foundation blocks on the south side. We found no remains of the original baseline on the north side where most of the foundation slabs were missing. When the foundation slabs are missing, one can see sockets or emplacements cut into the rock floor to receive the individual slabs. However, these do not help determine the exact position of the original pyramid baseline. On the west side there is only one foundation block in situ that carried the baseline.

This single block on the west side allowed us to ascertain the original base length of the pyramid, 21.75 m, by measuring to it from the preserved baseline on the east (the values here are measured graphically off the 1:50 plan). This is a bit less than 41.5 cubits. This reconstruction of the base puts the center of the pyramid .20 m north of the south (upper) edge of the burial chamber. The north–south center axis of the pyramid falls about .15 m east of the best approximation of the north–south center axis of the passage and chamber.

The Discovery of the Satellite Pyramid of Khufu (GI–d), Zahi Hawass
Studies in Honor of William Kelly Simpson Volume 1, 1996