Like all of HK’s products, the Composite Action System is patented and tested. This tie is designed to create a structurally-composite concrete sandwich panel. Composite action means that the two wythes of concrete are acting together structurally thus allowing a thinner panel to be created. The tie is pushed through the foam layer until properly seated, immediately after the bottom wythe of concrete is placed.
- Holds a both wythes of concrete affixed to the panel without the need for thermally inefficient metal connectors or solid concrete sections
- High strength and low thermal conductivity
- High-performance, alkaline & moisture corrosion resistant, engineered thermoplastic reinforced with glass fibers
- In-place temperature range: -40°F to 200°F
HK Composite Action Ties
Construction Consulting Laboratory International (CCLI) tested three full scale precast concrete sandwich wall panels by applying positive load by uniform pressure. The panels were designed by CEG and Manufactured by Meridian Precast located in Waco TX. The panel dimensions are 8 ft. wide and 32 ft. high. Test panels were installed into a test chamber and loaded to failure while deflections recorded during loading.
Below is a graph comparing the test data to a serious of theoretical load-deflection curves generated by Lecwall software for assuming 70% to 100% composite action. (Test data and theoretical curves were smoothed for clarity.)
The HK Composite Action ties are tested in accordance with the ICC-ES AC 320. The table below displays the testing comparisons of some of our Composite Action ties. You can view more complete testing reviews for each tie on their individual product pages.
|Tie Length (Inches):||5.25||6.25||7.25|
|Tie Dimensions (Inches):||0.47×3.13||0.47×3.13||0.47×3.13|
|Embedment Depth (Inches):||1.5||1.5||1.5|
|Insulation Thickness (Inches):||2.0||3.0||4.0|
|Average Ultimate Pullout (lbs): ¹||>5900||>5900||>5900|
|Average Ultimate Shear (lbs): ¹||>6700||>6700||>6700|
|300lb Tensile Load Retention Under Fire Exposure: ²||>120 min||>120 min||>120 min|