The Egyptians were able to build wooden boats, the most difficult form of carpentry, a series of simple wooden ramps would not have been a problem.

As regards speed of operation, if one team can elevate and dispatch one stone every 30 minutes then a line of ramps and lifting stations can deliver one stone to the pyramid site every 30 minutes. Two lines would deliver one stone every 15 minutes. Four lines one stone every 7.5 minutes.

At some time in the future I hope to build a ramp and test it with a ten ton stone, after which I will be able to supply more precise figures.