It takes a lot of strength and durability to withstand the weight of a jumbo jet. That’s why the project leaders for MidAmerica St. Louis Airport chose County Materials’ Prestressed Concrete Bridge Girders for its new taxiway. Because it spans a small stream, the project required girders that have exceptional structural strength and require minimal maintenance. Prestressed concrete bridge girders support the heaviest loads and have an extended service life of up to 100 years.