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Connolly® Key Joint System


Connolly® Key Joint System

Connolly® Key Joints supplied by InfraBuild Reinforcing, are a continuous pour solution for contraction joints in slab on ground applications. Connolly Key Joints are a roll formed galvanized steel section used as a leave-in-place formwork to control shrinkage induced cracking. The profile is fixed in place using the patented peg and wedge system.

The unique tongue profile provides positive load transfer with minimal stepping. For higher load applications the preformed knock-outs allow Key Joints to be used in conjunction with Connolly Universal Dowel Sleeves (UDS).

Key Joints are available in 3 and 6m lengths for slab thicknesses from 100mm to 300mm.

Typical Uses

  • Contraction joints in slab-on-ground applications
  • Shear load transfer through contraction joints


  • Rigid connection between key joint and Connolly Universal Dowel Sleeves through patented twist-fix feature
  • Patented Wedge fixing mechanism allows fast and accurate height adjustment
  • Additional stiffening ribs (KJ150, KJ200 & KJ300 only) to ensure straighter joints
  • Can be used to screed off which makes getting the right level quick and easy

To find out more about the Connolly® Galvanized Key Joint products stocked at your local InfraBuild Reinforcing please contact your nearest bar shop.

Key Joint – Galvanized
Product Code Height (mm) Length (m)
KJ100 100 6
KJ150 150 6
KJ200 200 6
KJ300 300 6
CKJ1003000 100 3
CKJ1503000 150 3
CKJ2003000 200 3
CKJ3003000 300 3
Key Joint Capping
Description Colour Width (mm) Set Down (mm) Length (m)
KJCAP Removable Grey 7.5 3 24
KJPCAP Permanent Black 9.5 3 24
KJCAPTBLK Permanent – Tearoff Black 9 4 24
Key Joint – Capping Foam Filler Strips
Colour Width (mm) Set Down (mm) Length (m) Suit Key Joint
KJF100 Black 10 8 6 100
KJF150 Black 10 8 6 150
KJF200 Black 10 8 6 200 – 300
Key Joint Accessories
Product Code Description Length (mm)
KJJ100 Joiner to suit 100mm key joint
KJJ150 Joiner to suit 150 mm key joint
KJJ200 Joiner to suit 200 mm key joint
KJPEG100 Stake 100
KJPEG150 Stake 150
KJPEG200 Stake 200
KJWP4 Wedge and Stakes 400
KJWP5 Wedge and Stakes 500