Prater’s Theory tests a 13-degree ramp for the great pyramid but changed the idea of using this gradient at the top of the pyramid, even though the small test was successful.

Noticing that a 7.5-degree spiral aligns with the great pyramids, present-day blocks, presents the possibility, Egyptian builders may have used this gradient for the top section of the pyramid. Thirteen-degree ramps work in tests, but the idea doesn’t seem right after the discovery. These were the test and thoughts before.

13-Degree Ramps

At this stage, the internal blocks for the great pyramid would be getting even lighter. Therefore, a larger block on a ramp with a lesser pitch would be relative to a small block on a ramp with a steeper pitch. If, the pitch was to slight, the gradient would bump into itself as it wraps around the top.

13- Degree Ramp Test – Using A-frame

The test was to see how far up the pyramid a 15-tonne block could reach using this gradient, with the ramps supported by the structure and for the small blocks at the top.

In the small model test, dropping a weight of 4.25 drew 13 up the slope. The weight theoretically moving 13 tonnes up the 13-degree ramp. Equating this to tonnes. 4.25-tonnes of pulling force for 13 tonnes.

So if, 4.25-tonnes became 4.92-tonnes, then this would theoretically move 15 tonnes up a 13-degree ramp. Each man exerting a pulling force of 150 kg = 34 men.
Allowing for the unknown, 46 men.

The page Images Relevant to Pages shows, the men do have the space required on the ramp to move a 15-tonne block to the height near the top shown in purple.

Originally, I chose this gradient purely for speed, moving the small 2.5-tonnes blocks into position. In any case, the discovery of the gradient alignment does not leave much choice at the pyramids, 137-meter mark.