So what exactly is a rebar and how is it useful?
A sturdy well dug foundation is a must for the safety of any structures be it a house or any other public dwellings like bridges, highways, dams, commercial complexes, residential condominiums, shopping malls, govt./strategic buildings etc.
Modern era gave birth to more complicated high-rise buildings and mammoth structures in metro cities, which propelled the advance of technology to construct such architecture. But over the centuries, engineers have also come to know one thing with growing certainty that earthquakes don't kill people but buildings do and with continuous jostling and tumbling of plates underneath the earth’s belly our structures faces daily onslaught of such tremors which eventually weakens our basic foundation. Most concerning part is that this is not visible through our naked eyes and when we do realize the importance of earth quake resistant structures it is often too late.
The ongoing debate that whether structures/housing in Non Seismic Zone should be build using earthquake resistant design & material has been lately adopted as a procedure across the world by leading architects and structural engineers.
One of the most important elements, which safeguard a structure against tremors and acts as a backbone, is quality of RCC used in the building. Across the world standards have been redefined and adopted as far as usage of REBARS is concerned in RCC as it plays the most vital role in preventing a building collapse in case of any eventuality.
Rebars have adequate tensile strength, ductility, concrete bonding along with uniform elongation and should also exhibit minimum value of sulphur and phosphorus. Just having TMT bars written along with brand name is not enough, but one has to make sure that whether QUENCH & TEMPERED process has been dually followed or not while manufacturing the same.
Market is full of scrupulous TMT bars brand, which though have properties of a FE 415 grade rebar and still present their product at par with earthquake resistant REABRS. One should be very careful with such products and always ask for appropriate Test Certificates before using it.