The Raftsundet Bridge is mainly constructed of high performance lightweight concrete with a hardened density of 125 pcf (19.75 kN ) and a 28 days compressive strength of 8,700 psi (60 Mpa). The bridge contains a total of 14,000 cy (10,700 m3 ) normal weight concrete and 3,140 cy (2,400 m3) lightweight concrete, with all the concrete having been distributed by standard concrete pumps. The pumpable lightweight concrete was designed with expanded slate aggregate from Carolina Stalite Company.