Lapping is not appropriate for connecting the TMT bar. Lapping can consume more time in installation & also cause greater congestion in concrete because a large amount of TMT bar is used.

Surya Engineering simplifies the design of MBT Coupler for the construction of reinforced concrete. This will reduce the number of required rebars.

Lapping is dependent on concrete for transferring a load, for this reason, degradation in the integrity of the concrete could affect the performance of the joints. The strength of MBT Coupler joints is independent of the concrete in which it is located, this MBT coupler retains its strength without losing cover which will result in impact damage or seismic.

Surya Engineering manufactured different ranges of Reinforcement bar Couplers which include Parallel Threaded Coupler, Taper Threaded Coupler, Mechanically Bolted Coupler, and Grouted Coupler.

Using MBT Coupler will provide a cost-effective method of joining TMT bars, it is also used in where reinforcement bar is already in place and there is insufficient space for hydraulic swaging press.

MBT Couplers are easy to install and achieve failure loads higher than 115% of the characteristic yield strength of the grade 500 TMT bar. Neither bar end preparation to form threads, nor bar rotating is required. MBT couplers can also be used to join imperial, plain round, or deformed reinforcing bars.

These TMT bars ends are supported by two serrated saddles, and the lock shear bolts are tightened. The lock shear bolts of couplers up to and including the bolts can be tightened using a ratchet wrench. For larger couplers, a nut runner is recommended.

In all cases, heavy-duty sockets should be used. When the pre-determined tightening torque for the bolts is reached, the heads shear off leaving the top of the installed bolt slightly proud of the coupler. This provides an instant visual check of correct installation.