Connolly Key Joints are a continuous pour solution for contraction joints in slab on ground applications.
Connolly Key Joints are a roll-formed galvanised 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.
Our 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). The Universal Dowel Sleeves are installed in the steel section using the patented Connolly twist-fix feature.
Key Joints are available in 3 and 6m lengths for slab thicknesses from 100mm to 300mm. Custom heights and lengths are available on request.
A wide range of permanent and removable capping, and rebate moulds are available to be used with Connolly Key Joints.
Position key joint in desired location and drive in the supplied pegs. Note that the LONGEST FLANGE of the key joint always goes TO THE TOP.
Adjust the key joint to the correct height and secure by tapping in the supplied wedges. If capping strips are to be used allow the appropriate set down distance and apply capping strip prior to pouring concrete.
Place the reinforcement and pour the concrete over the key joint. Finish concrete surface to the top of the joint (NOT ABOVE IT). Always pour concrete evenly to both sides of the joint and ensure concrete is compacted into the keyways.
|Description||Key Joint for 100mm slab||Key Joint for 150mm slab||Key Joint for 200mm slab||Key Joint for 300mm slab|
|Slab thickness [mm]||100||150||200||300|
|Profile heights [mm]||90||135||180||270|
|Length [m]||Standard lengths 3.00m and 6.00m|
(custom lengths available on request)
|Knock-out holes||Round holes dia 21mm at 150mm centres||Connolly Knock-out holes to suit UDS Sleeves at 150mm centres|
|Material||0.4mm steel, galvanised Z275||0.5mm steel, galvanised Z275||0.5mm steel, galvanised Z275||0.7mm steel, galvanised Z275|
|Pegs & Wedges||Pack of 4 per 3.00m length / Pack of 8 per 6.00m length|
|Peg dimensions||8.5mm x 350mm||8.5mm x 390mm||8.5mm x 500mm||12.0mm x 750mm|
Custom lengths (up to 6m) available on request.
For cappings and rebate moulds please visit the Key Joint & Straight Up Contraction Joint capping page.
Use the form below to send us an email with your enquiry or request for drawings.