... of a straight plank with a five-foot channel for water in the center. Each end of the chorobates had a leg positioned perpendicular to the plank. Plumb bobs at either end shown that the device was level when lined up with vertical lines drawn on the diagonal cross planks. The water in the channel was also used to check for levelness. Only when the ... a layer of concrete followed by more mortar and so on. When the foundation was complete, the real construction began. Each wall and pier of the building had to be exactly perpendicular to the foundation. This was achieved using an Egyptian...

• Word Count: 2911
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School