Reading cracks in design

On the day that the Vivekananda Road flyover in Kolkata would collapse, two labourers were climbing up its structure when they reportedly heard a cracking noise from the giant nuts in its cantilever. The structure was letting us—its makers, users and future victims—know that all was not well. The engineers of IVRCL Ltd, the construction firm building the flyover, reportedly paid no heed to reports of those sounds. According to an account in The Hindu, the joints were welded and liquid cement was poured over. The bridge collapsed a few hours later.

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