Additionally, King Solomon fashioned ten ornamental copper wagons called mechonot. Each wagon carried a laver filled with water. Five mechonot were arranged in a line to the right of the Ulam, and five to the left. On both sides of the entrance to the Ulam stood two high, decorated pillars. The pillar to the right of the entrance was called "Yachin," and the one to the left was called "Boaz." (Source: Kings I, Chapter 7). 
The Heichal of the First Temple: the Interior
Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII