TMT bars have several features that, when combined, offer maximum strength and durability to RCC structures. The most well-known of these properties are its corrosion-resistance, ductility, which makes its earthquake-proof and higher tensile strength.

However, there is one more feature that adds an extra layer of robustness to the structure – the cross ribbed pattern on the outer surface of the TMT bars!

For most laypersons, this pattern might seem fairly ordinary, but as any civil engineer would tell you – they are crucial for keeping the concrete and the steel bonded together.

What does the pattern on TMT bars do?

Earlier ordinary smooth sariyas had higher instances of material slippage i.e., concrete often slipped, causing structural collapse. This was mostly due to low bonding between concrete and steel bars. TMT bars with cross ribbed patterns were introduced to provide better bonding with concrete. The deformed patterns provide a better grip with construction materials.

This enhanced grip is crucial for keeping the structure intact during natural calamities such as earthquakes or floods when the stability of structures can reduce the loss of life and property.

What do you need to keep in mind while selecting Cross Ribbed TMT Bars? 

Pattern shape

Every TMT bar comes with a particular pattern on its outer surface – called ribs and lugs or cross-ribbed pattern. The specific pattern comes in several variations and is decided according to how the TMT bar will be used and the properties that are most desired.

For example, decreasing the height of lugs makes the TMT bar more flexible, while transverse ribs binding in the longitudinal ribs lead to the highest bond, but lower bending capacity.

Pattern formation

Consistency of the pattern and the technique of forming it is also an important factor you must pay attention to while selecting a cross ribbed TMT bar. The best pattern is made with CNC notch cutting machines, which ensure uniformity in the rib pattern giving the TMT bar higher fatigue strength. 

The Bottom Line

TMT Sariyas are undoubtedly the BEST for any RCC construction, and there is absolutely no reason why you should even consider working with ordinary sariyas. They are extra strong, earthquake resistant, corrosion-resistant, AND, as compared to ordinary sariyas, provide higher stability and strength to all types of buildings.

The only thing you need to ensure is that you buy your TMT sariyas from a reputable and well-known manufacturer and follow the latest and tested construction practices to get the best value for your investment.