Open's "Optimum Truss Panels" Passes Fire Resistance Test!

The Optimum Truss Panels is a new type of composite floor bearing plate developed by Open. It is made by processing cold-formed thin-walled steel into ribs, which are then combined with a fiber cement board at the bottom through screws. Continuous perforations in the ribs allow for the threading of rebar and pipelines within the plate. The non-removable bottom plate serves as a formwork during construction, reducing the need for on-site support, minimizing the thickness of cast-in-place concrete, thereby reducing weight and lowering costs. For the structure, it acts as a protective layer, while for the building, it serves as a decorative layer. By integrating longitudinal ribs, which double as distribution rebar, with support strengthening ribs, the bending strength and overall rigidity of the Optimum Truss Panels are enhanced, and its cross-sectional form is not limited by shape.

The Optimum Truss Panels has a simple structure and low cost, with significant advantages in cost control, factory production, and on-site installation. It is suitable for various structural forms in both residential and industrial buildings, offering substantial market potential.

Test Results

After being subjected to approximately 1000°C for 2 hours, the test sample did not exhibit significant delamination or spalling. The cotton pad at the bottom of the plate did not catch fire, and the overall temperature did not exceed the initial average temperature of 140°C. The maximum deflection measured on the plate surface was about 155mm, roughly half of the calculated ultimate deflection of 314mm.

Test Conclusion

The test demonstrated that the Optimum Truss Panels (two-way plate) meets the requirements of the "Test Method for Fire Resistance of Building Components." It can be used for building types up to 100 meters in height, maintaining good overall integrity, continuing to bear loads, and withstanding prolonged high-temperature conditions.