Gannett Fleming’s experienced engineers help you find solutions that are within budget, context sensitive, and exceed conventional expectations. From multi-level interchanges to small stream crossings to complex railroad lines, our staff’s diversity enables us to deliver highly effective solutions across a broad spectrum of projects.
Gannett Fleming consistently receives recognition for our bridge leadership, ranking among the top 25 bridge design firms by Engineering News-Record (ENR).
ACCELERATED BRIDGE CONSTRUCTION (ABC)
We use ABC methods to compress schedules in a cost-effective manner while extending bridge longevity and reducing future costs. Our team’s vast experience ranges from final designs that incorporate innovative construction methods, like pre-fabricated materials and self-propelled modular transporters, to developing client-specific policies, guidelines, and procedures for ABC projects. We routinely employ ABC methods for both rail and roadway projects.
Accelerated bridge construction: a time-lapse video of U.S. Route Nos. 1&9 and 46 Bridge Over Jones Road Replacement, New Jersey
Bridge design has been a core strength of ours for over a century, ranging from concrete or steel highway bridges to commuter, freight, or high-speed rail bridges.
We’ve worked on high-profile, complex bridges, collaborating with clients to solve challenges such as:
- Curved girder.
- Fracture critical.
- Spliced precast concrete.
- Truss bridge.
- Waterway crossing.
We bring unique results to your most challenging problems. Our leading-edge design solutions include:
- Carbon Fiber Reinforced Polymers.
- Cellular concrete fill over arches and substructures.
- Folded steel plate girders.
- Augercast bridge foundations.
We routinely provide efficient traditional structure design services for:
- Noise barriers.
- Retaining walls.
- Sign support structures as part of our work.
We also consider ground conditions on our projects in areas such as ground support and soft ground.
Gannett Fleming’s experts have authored design and inspection manuals and specifications for the:
- New Jersey Department of Transportation (NJDOT).
- Pennsylvania Department of Transportation (PennDOT).
- Arizona Department of Transportation (ADOT).
- City of Phoenix.
Our National Bridge Inspection Standards (NBIS) certified team embraces safety and ingenuity when examining structures, often using drones to enhance inspection documentation and add efficiency in our access methods.
Using automated flight plans and drone data to stitch together photos into 3D models enables owners to have rich data to understand the real-time condition of their structural assets and identify any structurally deficient areas. Gannett Fleming also uses geographic information systems (GIS) to help clients better visualize, analyze, and communicate their bridge condition data. Additionally, our Society of Professional Rope Access Technicians (SPRAT) certified inspectors utilize industrial rope access techniques to minimize traffic impacts while performing hands-on inspections of complex bridges and hard-to-access critical components.
REHABILITATION AND PRESERVATION
Gannett Fleming understands that timely and effective rehabilitation and preservation of existing bridges not only maintains public safety, but it does so in a cost-effective manner. We routinely provide inspection, design, and construction services for:
- Bridge rehabilitation and replacements.
- Substructure and superstructure strengthening.
- Elimination of joints.
- Coating repair and replacement.
- Seismic retrofits.
- All other typical timber, concrete, and steel rehabilitations.