ocr: Construction The stone blocks that were used to build the pyramids are heavy. Most of them weigh as much as 30 men, and some weigh as much as 800 men! These stones were floated down the Nile on barges. Then they were dragged to the pyramid site. Once the first layer of blocks had been laid in place, workers built a ramp out ofwood and mud-brick. Then they dragged blocks up the ramp to build Large stones were placed above the the next layer of the pyramid. The ramp rooms as ceilings. was extended upwards as the layers were completed. See Also: Preparing the Site Spaces in each layer were left e ...