The use of progressively higher strength reinforcement steel resulted in increased demand for smaller diameter steel bars, to replace higher diameter steel bars, due to economic reasons .Production of CTD bars or TMT bars was limited to 8mm dia. The solution was found by invention of a new type of reinforcement bar ,the high strength deformed bar. Because of their economic as well as technical excellence these bars gained international acceptance easily.
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EM Bypass, Kolkata, West Bengal