Definition
Thermo Mechanically Treated (TMT) Bars have completely replaced older mild steel and cold-twisted bars in Indian civil engineering. They are manufactured using a specialized metallurgical process where hot steel wires are passed through a rapid water-cooling system (quenching). This makes the outer surface incredibly hard and strong (yielding high tensile strength) while keeping the inner core miraculously soft and ductile (allowing them to bend without snapping during an earthquake).
Practical Example
A structural engineer designing a hospital in a high-seismic zone specifies "Fe 500D TMT Bars" for all columns. "Fe 500" denotes immense yield strength, while the "D" stands for extreme Ductility. If an earthquake strikes, these highly ductile TMT bars will stretch and absorb the shock energy, preventing the column from shattering instantly.
Application in Superwise
TMT steel is highly prone to raw material price volatility. The Procurement tracking in Superwise monitors the landed cost of TMT steel continuously. If the market price crosses the original BOQ estimated rate, the system alerts the Project Manager, allowing them to invoke the "Price Escalation Clause" in their client contract to recover the unexpected inflation costs.
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