>The maximum width (east-west) of the Grand Gallery is circa. 4 royal cubits/6.9 feet.
Because the Pyramid's builders were able to span the width of the King's Chamber (circa. 10 royal cubits/17.2 feet) with a single block, I would suggest that your explanation is most unlikely.<

Your not comparing like with like. The Grand gallery is built of limestone which wouldn't be strong enough to span the width. Using granite as in the King's Chamber to span the whole width and length of the Gallery would have been a massive task.

Even when they used granite in the King's Chamber they had to use relieving chambers above to spread the load which is another technology to do the same job as a corbel.

The corbel of the Grand Gallery is just a natural extension of previous examples in the Red Pyramid and before that in the Bent and at Meidum. If they were building in limestone then corbels were the way they did it.

Jon

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