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BT Headed Anchors

BT Headed Anchors

BT Headed Anchors create an anchorage in the concrete, replacing the need for cogged or hooked bar ends. They can simplify scheduling and bar placement, and reduce congestion in the concrete.

Designed for use on 12mm to 50mm reinforcing bars. BT Headed Anchors are internally threaded with metric threads to suit the BT coupler system. They create a full strength joint, the mode of failure being bar break.

BT Headed Anchors can be used in accordance with clause 13.1.4 of AS 3600:2018 to reduce the development length of reinforcing bar. For typical applications, the development length is reduced to 10 times the diameter of the bar*. Refined calculations can be performed using the bearing area (Ahead) values provided in the table below.

Bar Diameter 12 16 20 24
Anchor Length (l) 14 20 24 30
External Dia. (d) 38 50 65 75
Net Bearing Area (mm2) 1021 1762 3004 3965
Thread Size M14 x 2.0 M20 x 2.5 M24 x 3.0 M30 x 3.5
Part No. AA12 AA16 AA20 AA24
Bar Diameter 28 32 36 40
Anchor Length (l) 33 36 42 45
External Dia. (d) 90 105 120 130
Net Bearing Area (mm2) 5746 7855 10292 12017
Thread Size M33 x 3.5 M36 x 4.0 M42 x 4.5 M45 x 4.5
Part No. AA28 AA32 AA36 AA40

Note: BTAA50 couplers can be manufactured. Contact Ancon for details.

*Reduction in development length based on 32MPa concrete and where K1=K3=1

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