Is the JointLOCK System a proprietary system?

Yes. The Adjusta JointLOCK System consists of an engineered set of matched components that have been designed and tested for performance in unison. All components in the JointLOCK System must be purchased from Adjusta to ensure the correct specifications and load capacity of the connection.

Does the JointLOCK System have a rated connection strength for carrying design loads?

Yes. The JointLOCK System has been extensively strength tested for capacity to transfer loads between concrete elements including axial tensile forces, horizontal and vertical shear forces, and flexural loads with bending moments at the connection. Go to the Technical Data Sheet TDS401 for further details.

Are there any limits to the spacing of the JointLOCK connections, or allowable distance to an edge of the concrete wall?

There are no minimum spacing limitations on JointLOCK connections, and distance to the edge of a concrete section is determined by minimum concrete cover. The JointLOCK System’s Hook Bar wall anchorage has a double loop configuration that is not subject to shear cone pullout or rupture of the concrete. A reinforcement cog or hook embedded in concrete produces a lateral force in the concrete but does not cause the shear cone failure. Concrete slip resistance testing shows the Hook Bar does not slip or creep at the ultimate tensile loads, and therefore no movement occurs in the connection at the joint.

What is the yield strength of the JointLOCK head in tension?

The JointLOCK Connector head exceeds the ultimate tensile yield capacity of N16 rebar. In axial tensile testing the typical mode of failure is the N16 starter bar breaking under stress of 650MPa and the JointLOCK Connector and Hook Bar do not deform or yield at this load.

How do JointLOCK System connections resist shear forces at the joint?

The JointLOCK System provides a rigid mechanical reinforcement connection and a rebated concrete shear key to transfer shear forces at the construction joint.

Horizontal shear force resistance; In tensile zones of the concrete section the reinforcement and JointLOCK connection transfer the shear force in tension. In compression zones the concrete carries the shear force in compression.
Vertical shear force resistance; The JointLOCK system’s rebated shear key allows shear force transfer across the slab to wall construction joint. In typical depth slabs the concrete has the shear strength to carry the vertical shear forces in compression. In concrete beams with low span-depth ratios the beam is detailed with vertical shear reinforcement stirrups to assist the shear force resistance of the concrete section.

Note: There is currently no ASTM test method or compliance requirement for testing the shear capacity of mechanical splicing devices.

Is the JointLOCK System economical ?

Yes. The JointLOCK system is the most cost effective way to form wall to floor joints in highrise buildings and easy connections between precast concrete sections and poured sections.

Does the JointLOCK System conform to the concrete code and the steel code ?

\Yes. Unlike other systems that do not provide correct development lengths of bar, or require bending and re-straightening of bar in non-compliant ways, the JointLOCK system conforms to all applicable Australian codes.

What sizes are available ?

The JointLOCK System is a 16mm reinforcement starter bar connector that performs equivalent to continuous 16mm rebar across the joint in a monolithic concrete structure.

Is the JointLOCK System easy to install ?

Yes. The JointLOCK system is installed by using a re-useable rebate form that is simple to fit and strip. Go to the Installers page.

Is the JointLOCK System as strong as other connectors?

Yes. The JointLOCK System has superior strength characteristics over other types of rebar connector. Go to TDS439 System Comparison.

Do the installers need any special tools or equipment ?

No. Nothing other than a hammer and nips are needed.