reply to post by spines
On the show I watched, they explained how the Incas used various methods to move the very large stones long distances.
First, they beveled the bottom of the stone. This makes the stone much more movable, and decreases the amount of pressure needed to push/pull the
stone by half. A 30 ton stone would then only take 15 tons worth of work to move.
Second, they made cobblestone pathways, which reduced friction to move the large rocks.
Thats really all I can remember, like I said, I was getting ready for work at the time, the show didn't have my full concentration... I wish I could
watch it again. Hoping for a rerun, ill record it.