Synthetic sheet pile has recently become a significant choice in design of sheet pilestructures. While there is abundant literature concerning PVC as a compound there is littleavailable concerning its use in a structural capacity. Design assistance is also limited and what exists is based on traditional steel sheet pile design which does not address issues seen in viscoelastic materials. Full-scale testing was completed using a series of PVC interlocking sheet piles. The sheet piles were subjected to loading for a duration of seven days while deflection and strain were measured. The deflection and strain were compared to theoretical values and previous laboratory testing. Existing deflection prediction equations for creep deflection tend to overstate deflection measured while the strain measured in full sheets is less than that of laboratory testing.