Bartec Plus Couplers

Bartec Plus couplers offer a full strength connection together with enhanced fatigue resistance. They are suitable for projects of all size, including those requiring a high volume of couplers, such as road and rail bridges.

Each end of the rebar to be joined is cut square and enlarged using a cold forge process. A thread is then formed on the enlarged bar end using a thread rolling machine. The thread is such that the cross-sectional area of the bar ends are not reduced ensuring the strength of the connection matches or exceeds that of the parent bars.

It is the application of the rolled thread that differentiates Bartec Plus from other threaded rebar systems. Each thread-rolled bar end is proof-loaded to a force equal to the characteristic yield strength of the rebar. It is the combination of these processes that provide the connection with enhanced fatigue resistance.

Please note this product is only available in the UK and Ireland. Contact Leviat with your international enquiries.

Approval

Ancon Bartec Plus Type A Standard Couplers in the size range 12mm to 40mm and Type C Positional Couplers in the size range 12mm to 40mm have been evaluated by UK CARES Technical Approval TA1-A for use as follows:

• TA1-B: Eurocode 2 and BS 8110 for static applications in tension only with BS4449 Grade B500B and B500C reinforcement.
• TA1-A: Class D fatigue requirements with BS4449 Grade B500B and B500C reinforcement.
• These couplers are also compliant with BS 8597: 2015.

Bartec Plus Type A

The Type A connection utilises an internally threaded coupler to join two cold-forged and thread-rolled bar ends together. Each bar end is threaded to half the length of the coupler. Type A connections are used where the continuation bar can be rotated.

Bartec Plus Type B

The Type B connection utilises the same coupler as for the Type A, the difference being one bar end is threaded for the full coupler length. Type B connections are used where the continuation bar can be rotated for no more than one revolution.

Bartec Plus Type C

The Type C connection utilises the same coupler as for the Type A, together with locknuts and longer threads to the bar ends. Where fatigue is a major consideration, an additional locknut is used. Type C connections are used where the continuation bar cannot be rotated.

Bartec Plus Transition Couplers^*

Bartec Plus couplers can be used to connect reinforcing bars of differing diameters, developing the full tensile strength of the smaller diameter bar together with the enhanced fatigue resistance.

For Type A transition connections, both bars utilise standard Type A Bartec Plus threads with a special coupler to connect the two bars.

Transition connections requiring types B or C systems use the standard Bartec Plus thread for the smaller bar and a modified BT thread for the larger bar which uses a thread pitch matching the smaller thread to allow simultaneous rotation of the coupler on both bars.

Locknuts for Type C connections use the standard locknut for the smaller bar and a modified locknut with the modified thread pitch for the larger bar.

The threads are such that the cross-sectional area of the bar ends are not reduced beyond that of the smaller diameter bar, thus ensuring the strength of the connection matches or exceeds that of the smaller bar.

Bartec Plus Transition Type A

The Type A connection utilises an internally threaded coupler to join two cold-forged and thread-rolled bar ends together. Each bar end is threaded to half the length of the coupler. Type A connections are used where the continuation bar can be rotated.

Bartec Plus Transition Type B

The Type B connection utilises the same coupler as for the Type A, the difference being one bar end is threaded for the full coupler length. It is usual to rotate the coupler from the smaller diameter rebar onto the larger. Type B connections are used where the continuation bar can be rotated for no more than one revolution.

Bartec Plus Transition Type C

The Type C connection utilises the same coupler as for the Type A, together with two locknuts and longer threads on the bar ends. It is usual to rotate the coupler from the smaller diameter rebar onto the larger. Type C connections are used where the continuation bar cannot be rotated.

*This detail is to be used with micro-alloy / through hardened rebar only, as threading directly onto rebar produced using the quench and temper or thermo-mechanically-treated methods may result in a disproportionate loss of strength.

Bartec Plus Headed Anchors

The Bartec Plus Headed Anchor provides an alternative method of achieving rebar end anchorage within concrete. The Bartec Plus Headed Anchor is essentially an oversize coupler capable of carrying the full tension load of the bar when it bears against the concrete in which it is cast. The Headed Anchor removes the need for the hooked rebar end and subsequently reduces congestion,simplifying bar placement. This in turn increases the speed of construction and gives greater flexibility in design. Typical applications include pilecaps and beam-to-column connections.

Bartec Plus Weldable Anchors

Bartec Plus welded couplers provide a convenient means of connecting reinforcing bars to structural steel plates or sections. One end has the Bartec Plus thread form; the other end is prepared for welding to the steel.

Although the coupler is suitable for welding to structural steels EN BS 10025, Grade S275 (43A) or Grade S355 (Grade 50B), the load conditions at the connection must be determined by the designer responsible for this structural element, along with the type and size of weld required. Other important considerations are the type of electrode to be used, which must be matched to the properties of the plate and tube, and to the site conditions under which the welding will be undertaken. Welders should be qualified for the type of weld required.

Bartec Plus Weldable Couplers are manufactured from either Steel Grade 1045 to ASTM A576 or Steel Grade C45R to EN10083.

Related Projects

Queensferry Crossing, Forth Estuary, Scotland

Over 100,000 Ancon Rebar Couplers have been used in the concrete support towers, end piers and road deck of one of the longest cable-stayed bridges in the world.