To build a strong core structure, you must use high-quality TMT bars with corrosion resistance, high ductility, and fire resistance. Many people emphasize corrosion resistance and ductility and do not understand the importance of using fire resistant TMT steel bars.
In case of any accidental fire breakout, only good fire resistant TMT steel bars provide significant safety. However, you need to know how to measure fire resistance and what to look for while choosing the bar. In this article, we have listed all the necessary information that you need to identify the best fire resistant TMT steel bars.
Before you start looking for fire resistant TMT steel bars, you must know how to measure fire resistance and what the ideal fire resistance rating (FRR) is for your project. The TMT bars in India must pass a Fire Resistance Test (FRT) to determine their fire resistance rating.
During this test, the bar is exposed to fire and high temperature for a particular duration, and the changes in the bar are monitored during that time. The FRR score of the bar is determined according to the maximum time duration it can hold its strength and functionality. For example, if a bar does not lose its functionality and strength for 120 minutes while exposed to fire or high temperature, then its FRR is F120.
In India, the fire safety ratings for fire resistant TMT steel bars are different for home and commercial buildings. For homes, the fire resistant TMT steel bars should resist the fire for at least one hour, and for commercial buildings, the standard is at least two hours.
Besides this, you also should check the ratings for the Smoke-Developed Index (SDI), which indicates the amount of smoke that can be generated from the bar if it catches fire. One more concerning factor is the Flame Spread Index (FSI), which indicates how fast the fire can spread if the bar is exposed to fire.
While choosing the best fire resistant TMT steel bars, remember the following points.
Fire Safety Rating
As discussed earlier, there is a way we measure Fire Resistance Rating, and a standard of the fire resistant TMT steel bars has been set for each type of building or structure. You should first check the ideal rating for the project that you are willing to build. Then, check the rating secured by the TMT bars you are considering buying.
Certification Of Compliance
The manufacturer may claim about the standard of the TMT bar, but you should check the certification. The fire resistant TMT steel bars you are choosing should adhere to the compliance set by the Bureau of Indian Standards(BIS). Check the ratings for FFR, SDI, and FSI.
Finish and Coating
Good fire resistant TMT steel bars will have coatings and finishes that prevent fire from spreading and affecting the bars. Some manufacturers apply intumescent coating on the surface that expands when exposed to fire. This coating then protects the bar from fire and heat for a longer duration. So, checking the finish and coating is also important while choosing the right bar.
Brand Reputation
Buying your TMT bars from a reputable brand is always advisable. A reputable brand never compromises quality, testing standards, certifications, and compliance, which determine safety. Even if you need to pay extra, always buy the fire resistant TMT steel bars from a reputable brand.
The strength of a construction greatly depends on the strength of its core structure. The core structure gets its strength from the TMT bar used in making it. You must check whether the safety standards have been maintained in the manufacturing process of the TMT bars. You must check fire resistance standards and always purchase your fire resistant TMT steel bars from a reputed brand to ensure safety.
