headshot of Das

Satrajit Das, Ph.D., P.E., F.ASCE, a senior technical leader at RK&K, Raleigh, North Carolina, has been named a fellow by the ASCE Board of Direction.

Das has over 30 years of collective experience in bridge and structure design, rehabilitation, structure condition assessment utilizing inspection, diagnostic load testing, scientific research, and project/program management. He has a depth of expertise in the engineering of a variety of bridge types, including prestressed concrete girders, cast-in-place, curved posttensioned concrete box girders, long-span precast posttensioned concrete segmental box girders and slabs, precast concrete posttensioned spliced girders, hybrid steel girders, curved steel girders, reinforced concrete arches, steel trusses, and cable-supported structures including suspension bridges. He has proven competence in designing various substructure and foundation types. He has hands-on experience in advanced finite element analysis – soil-structure interaction effects, time dependent analysis, and performance based seismic design of bridges and structures.

Some of Das’ recent design accomplishments include the 2.46-mile long Jug Handle Bridge that bridges the treacherous “S-Curves” along NC 12 in Pamlico County, and the fixed span substructure of the 2,691-foot-long replacement structure for the historic "S" bridge swing span and causeway over the Perquimans River, in Hertford. Both of these projects were recognized with the ACEC-NC Grand Excellence Award in 2022 and 2023, respectively. Das has worked on several exciting bridge design projects throughout his career, including designing for the widening and rehabilitation of the historic Henley Street Bridge in Knoxville, Tennessee – a 1,720-foot-long six-span open spandrel reinforced concrete arch bridge, originally built in the 1930s. 

Das has also performed structure condition assessment and recommended refined load ratings for multiple in-service bridges and/or culverts in North Carolina and Rhode Island utilizing field instrumentation, diagnostic load testing, and 3D FEA. He utilized similar tools alongside long-term monitoring data when applicable to investigate unique structure conditions observed in the following New York bridges: the Robert F. Kennedy Bridge, the Bronx Whitestone Bridge, a representative span of the 3.8-mile-long Gowanus Expressway Viaduct, and the Hicks Street–Henry Street pedestrian bridge. 

Currently, he is serving as the structures project manager for the design of more than 12 bridges and structures associated with the 16.9-mile-long, high-profile project I-5986A/I-5877 I-95 Widening Design Build, in Cumberland and Harnett Counties in North Carolina.

Das has published several papers in various technical journals and conference proceedings. He has presented many of his projects at international conferences. He is constantly engaged in sharing his technical expertise by mentoring the next generation of structural engineers. In this pursuit he has served as an instructor in multiple bridge and structural engineering workshops throughout his career.

He earned his master of science and doctoral degrees in structural engineering and mechanics from North Carolina State University, and his bachelor of engineering degree in civil engineering with Honors from the University of Rajasthan, India. A member of ASCE for 28 years, he is a registered professional engineer in North Carolina, South Carolina, Florida, and Virginia.