The dome’s double curvature and structural engineering render it stronger and more efficient than other structures, even when spanning more than 350 feet. The dome consists of an outer PVC membrane, polyurethane insulation, and layers of steel-reinforced concrete.
The construction process produces a super-strong structure, one that can support a headhouse a comparable structure just couldn’t tolerate without tremendous extra support and cost. In a dome there is no need for interior beams or columns because the structure is self-supporting and free-spanning.
