Their external diameter varies between 2.3 m and 9.20 m while the internal diameter is only between 1.4 m and 4.80 m. A collapsed flat roof of one building found recently indicates that not all roofs were dome shaped as was originally believed.
Их внешний диаметр — от 2,3 до 9,2 м, внутренний — от 1,4 до 4,8 м. Крыши были плоскими, хотя ранние исследователи предполагали, что кровля была в виде купола.