Faulty structure, sub-standard materials behind Nabarangpur bridge collapse PNN Nabarangpur: A day after a labourer was killed and four others were injured following the collapse of an under-construction Biju Setu (bridge) on river Nagi in Talapadar village in this district, the superintending engineer (SE) visited the mishap site and conducted a preliminary probe into the mishap, Monday. SE Pradip Kumar Jena of Rural Development Department in Sunabeda claimed the mishap occurred due to weak centering support, use of substandard raw materials and compression of the ground where the foundation was laid. Jena was accompanied by the quality control team during the visit. The SE said this after conducting a probe at the mishap site. “The pipes used in the centering must be defective or else there might be some fault in the spacing between the pipes,” Jena said.