Structural Retrofitting of a Dilapidated Bridge on National Highway-14

Mangesh Joshi, CEO, Sanrachana Structural Strengthening & Rajib Chattaraj, Former Chief Engineer, NH, West Bengal, explore the extensive structural retrofitting applied to the Birendra Sasmal Setu (Bridge), a 50-year-old Prestressed Concrete (PSC) bridge on National Highway-14 over river Kangsabati in the district of Paschim Medinipur, West Bengal.

The bridge, which had experienced significant deterioration due to poor-quality of materials and workmanship and severe honeycombing in the T-beam girders, was initially deemed unfit for service and recommended for reconstruction of new bridge. However, through innovative retrofitting techniques, the bridge's deficiencies were addressed, allowing it to pass the load tests required by IRC standards and be reopened with some amount of load restrictions for better safety.

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