MBT Couplers

MBT couplers require neither bar end preparation to form threads nor bar rotation to effect installation. The bars are supported within the coupler by two serrated saddles.

As a series of lockshear bolts are tightened to a predetermined torque, they are embedded into the bar. At the same time the saddles bite into both the bar and the shell of the coupler. Installation is complete when the heads of all of the bolts are sheared off. The lockshear bolts on sizes 10mm to 20mm can be tightened using a ratchet wrench. For larger sizes a nut runner is recommended. Impact tools must not be used. MBT couplers can be used to join imperial, plain round or deformed reinforcing bars.

Testing & Approvals

MBT couplers are manufactured to a strict quality regime accredited to ISO 9001 and have been extensively tested in Australia using grade 500N reinforcement bar manufactured as per AS/NZS 4671:2019. The connections using MBT couplers, in common 12-20 mm sizes, exceed the tensile strength of the reinforcement bar and comply with requirements of section 13.2.6 of AS 3600:2018 and AS 5100.5:2017.

Connections with sizes 24-40 mm MBT couplers achieve failure loads higher than 110% of the characteristic yield strength of grade 500N reinforcement bar.

MBT couplers are approved for use on RMS (formerly RTA) contracts.

MBT couplers have been tested to show compliance with the following design codes: BS5400, BS8110, ACI 318 and DIN 1045 German Code.

MBT Coupler Connection

The MBT Coupler connection is used to connect reinforcing bars of the same size.

Note:
MBT50C couplers can be manufactured. For details contact Leviat.

MBT Transition couplers are available to join bars of different diameters, for details on the MBT Transition Couplers please click here.