We are excited to share that F3 Timber Technologies has been granted a U.S. patent (US12117035) for our innovative Glued Rod Imbed (GRI) technology! This marks a significant step forward in advancing engineered timber construction, offering enhanced performance, reliability, and efficiency for glued-in-rod applications.
Why the GRI System Stands Out
Unmatched Performance
Testing by UBC’s TEAM Laboratory revealed the GRI system increases peak load capacity by 20-40% over traditional glued-in-rods. At shorter embedment lengths (60mm), the results are even more remarkable, with 33% greater withdrawal strength.
Engineered Precision
Designed with circumferential ridges, the GRI system ensures a secure fit, minimizes variability, and simplifies installation. Contractors can complete rod installations in just 3-4 minutes, eliminating the need for custom jigs and significantly improving efficiency.
Enhanced Durability and Safety
Yielding Zone Innovation: A 50mm epoxy-free zone at the rod opening enables predictable, ductile failure modes, improving lateral stress resistance and shear force absorption.
Material Adaptability: The GRI system supports various rod diameters, thread pitches, and embedment depths, making it versatile for diverse mass timber applications.
Key Findings from UBC’s Testing
Withdrawal Strength: Connections with GRI achieved an average withdrawal strength of 502 N/mm, compared to 378 N/mm for traditional systems- a 33% improvement.
Consistency: GRI-enabled specimens demonstrated lower variation, ensuring more predictable and reliable outcomes.
Superior Capacity: For Douglas fir glulam with 120mm embedment, the peak load reached 524 kN, outperforming conventional methods.
Benefits for Engineers and Contractors
Efficiency Gains: Simplified installation reduces labor hours and minimizes on-site complexity.
Structural Confidence: Designed to exceed building code standards, the GRI system ensures robust connections for critical mass timber applications.
Versatility: Perfect for beam-to-column connections, CLT panels, and custom assemblies.
At F3 Timber Technologies, we’re proud to lead innovation in mass timber construction. Obtaining the patent for GRI technology is a testament to our commitment to advancing sustainable, efficient, and reliable engineered timber solutions.
Thank you for joining us on this journey toward a safer and more sustainable future in construction.
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Learn more about the GRI system Here
Visit our YouTube channel for the complete GRI technology demo video.