Transportation Structural Engineering

Structures designed by JMT for transportation projects serve as some of the most visible examples of our engineering capabilities. The firm's transportation structural expertise encompasses bridges, retaining walls, culverts and noise barriers. We provide design and construction phase services toward the completion of new and rehabilitated structures as well as inspection services on an individual or program basis.

Our extensive design and inspection experience includes:

Bridges over water, highways and railroads constructed of steel, reinforced concrete, prestressed concrete and timber
Pedestrian bridges using steel, prestressed concrete and timber
Culverts using precast concrete, prestressed concrete and corrugated metal
Retaining walls including cantilever, counterfort, gravity, mechanically stabilized earth, tied back, and post and panel
Noise barriers, including ground and structure supported
Sign structures including bridge, cantilever, butterfly and structure mounted
High mast light poles

New Design

JMT has set a standard of excellence in structural engineering that has helped us earn many awards for our designs of new and replacement structures. These designs have included vehicular and pedestrian bridges as well as other transportation-related structures. JMT provides, as needed, construction support services, such as shop drawing review and approval.

We give special attention to bridges over highways, waterways and rail lines as we consider issues related to the environment, aesthetics and constructability to be important components of the design process. JMT's structural engineers are well versed in all design methodologies including Load and Resistance Factor Design (LRFD).

Remedial Design

JMT's extensive design history involves the repair and reconstruction of structures as part of routine maintenance or due to an emergency situation. Development of repairs for routine maintenance and rehabilitation extend the service life of structures for our clients.

Our engineers are available to respond to emergency situations to assess initial damage, provide recommendations related to public safety and provide the required design services. Our experience allows us to develop quick cost effective solutions to minimize the inconvenience and safety hazard posed to the traveling public.

Inspection

JMT has significant experience with bridge inspections for state, county, and municipally owned bridges that is consistent with National Bridge Inspection Standards (NBIS) ranging from preliminary visual inspections to in-depth, hands-on inspections. These inspections have included, when required, non-destructive testing, destructive testing, load rating analysis, scour analysis, underwater inspections and seismic evaluations. All work is performed under the direction of registered professional engineers. JMT Team Leaders have completed the Safety Inspection of In-Service Bridges course as well as other specialty training.

JMT uses the latest in technology to improve the efficiency, quality and cost-effectiveness of our field crews and office tasks. JMT uses specialized access equipment and rigging to access to all parts of a structure to access areas of bridges that normally require lane closures, thereby minimizing the inconvenience to the traveling public.

Projects

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Francis Scott Key Bridge Rehabilitation over the Potomac River

Washington, D.C.

JMT performed field inspection, concrete and steel testing and evaluation for a historic bridge.

Chester County, Pennsylvania

JMT provided a full range of services to replace a landmark bridge with a new structure that met the community's expectations within a historic district.