Hancock developed the initial design of precast concrete Box Culverts for use in the State of Minnesota and manufactured the first concrete box installed in the state in 1974. Hancock was also instrumental in developing skewed box end sections, which allow the end sections to blend into the fill slope on skewed or non-perpendicular installations. Today, Hancock’s facilities are a model of efficiency for box production regularly building more than 40 pieces a day at one plant alone.
With superior strength and durability, precast Box Culverts provide a versatile and economical alternative to the cast-in-place concrete bridge. They are available in multiple sizes and can be installed in single, double cell or multi-line configurations.