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)
CKJ1003000 1003
CKJ1503000 1503
CKJ2003000 2003
CKJ3003000 3003

Key Joint Capping
ProductCode DescriptionColourWidth (mm)Set Down (mm)Length (m)
KJCAP Removable Grey 7.5324
KJPCAP Permanent Black9.5324
KJCAPTBLK Permanent – TearoffBlack9424

Key Joint – Capping Foam Filler Strips
ProductCode Colour Width (mm) Set Down (mm) Length (m) Suit Key Joint(mm)
KJF100Black 10 8 6100
KJF150 Black1086150
KJF200 Black1086200 – 300

Key Joint Accessories
Product CodeDescriptionLength (mm)
KJJ100Joiner to suit 100mm key joint-
KJJ150Joiner to suit 150 mm key joint-
KJJ200Joiner to suit 200 mm key joint-
KJWP4Wedge and Stakes400
KJWP5Wedge and Stakes500

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