Press Brake & Folded Plate
Folded and Press Brake Options for Accelerated Bridge Construction
Press Brake Tub Girders (PBTG) and Folded Steel Plate Girders (FSPG) provide an economical alternative for simple and short span bridge construction. These innovative yet simple models provide a long service life, requires little maintenance, and are designed for accelerated project delivery.
- PBTG consists of modular galvanized shallow trapezoidal boxes fabricated from cold-bent structural steel plate. The concrete deck is recommended to be precast on the girder and the modular unit can be shipped by truck to the bridge site. The system utilizes standard plate widths (based on availability) and is optimized to achieve maximum structural capacity, with most of the steel in the bottom flange and increased torsional stiffness. It is a closed system, since the girder is closed at the bottom, and is versatile for multiple-deck options. PBTG are “open source”, meaning the design is open to all manufacturers for fabrication.
- FSPG are fabricated from a single steel plate of uniform thickness that is then bent along multiple lines using a hydraulic metal press break to form an inverted tub shaped section. The plate thickness of either 3/8 in. or 1/2 in. can accommodate all span lengths by simply changing the location of the bends. The innovative, patented design eliminates the need for internal and external cross-frames because the design generates a large amount of lateral stiffness. The open bottom geometry of the folded steel plate girder makes the inspection of the quick and easy. For more information, contact CDR Bridge Systems.
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SSSBA Publishes New Research Report in Technical Series On Innovative Press-Brake Formed Steel Tub Girder Bridge Technology
Research report on field evaluation that includes skew and superelevation.
Seven volume research report on the development and testing of steel press brake formed tub girders.
An article highlighting press brake tub girders is published in a key bridge journal.
Contractor uses press brake tub girder for its ease of construction and short lead time (less than 8 weeks).
St. Clair County Michigan Uses Press Brake Tub Girders for ABC Project.
The Amish Sawmill Bridge in Iowa is the first steel press-brake-formed tub girder bridge in service in the United States.
Muskingum County (Ohio) uses press brake tub girder bridge for accelerated bridge project.
Press Brake Formed Tub Girder (PBTG) provides cost-effective option for a County in Iowa.
The Cannelville Road Bridge in Ohio was completed ahead of schedule, and is expected to have a service life of more than 100 years.