The U.S. Highway 45 project located in Langlade Cournty, Wisconsin consisted
of widening a 4½-mile 2-lane section of highway. Funding for this project was the responsibility of Wisconsin Department of Transportation (WDOT) and Federal Highway Administration (FHWA).
Due to the low bearing capacity of the existing silt soils, undercutting would have been required at depths ranging from 4 to 6 feet. Designing the road base with a biaxial geogrid reduced the required undercutting to only a depth of 2 feet.
Approximately 183,622 yd² of FORNIT® 20 biaxial geogrid was installed by Hoffman Constructors, the general contractor for this project.
The highway design incorporated the following:
- A WDOT Type 1 granular fill was placed above the FORNIT® 20 biaxial geogrid and compacted.
- 9 inches of 1½ inch minus base course aggregate was compacted above the Type 1 granular fill.
- 4 inches of asphalt base course was placed above the base course aggregate
- 2 inches of asphalt wearing surface was placed above the asphalt base course.
This project was completed in November 1999. Comment made by the General contractor to HUESKER, Inc.:
"It is our experience that the FORNIT® 20 was a tremendous success. The
placement and handling of this product was of minimal cost to our operation
due to its design characteristics. FORNIT® 20 is
the best geogrid product that we have ever dealt with."
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