Exciting news on Simpson Strong-Tie's FRP strengthening systems

Simpson Strong-Tie is pleased to announce that it has obtained an ICC-ES Evaluation Report (ESR-3403-NZ) for its Composite Strengthening Systems, specifically for the NZ Building Code.

The ICC-ES Evaluation Service Report (ESR) provides proof of Code compliance for the strengthening of columns, beams, slabs, walls, wall-to-floor joints, and concrete diaphragms. This provides confidence and certainty to regulatory authorities and the market that these systems are independently evaluated and comply with the requirements of the NZ Building Code for specific applications.

Full-scale application-specific testing of FRP-strengthened columns for seismic retrofitting

Fiber Reinforced Polymers (FRP) are a powerful tool for seismically retrofitting concrete structural walls and concrete diaphragms.

However, existing design guidelines like ACI PRC-440.2-17 and ASCE/SEI 41 offer limited guidance for seismic applications of FRP strengthening.

That's why Simpson Strong-Tie conducted a series of full-scale cyclic tests on shear-controlled RC walls and concrete diaphragms. The findings highlight the importance of proper anchoring for horizontal FRP strips to maximise seismic retrofit benefits.

Simpson Strong-Tie's R&D facilities continually support full-scale replica testing at the Simpson Strong-Tie Tyrell Gilb Research Laboratory to validate solutions developed, with the technical guidance and expertise of both Simpson Strong-Tie engineers and industry professionals, using Composite Strengthening Systems for seismic retrofitting.

“Interior columns were wrapped with FRP for added strength, using a three-sided wrap that was designed, tested, and approved to further avoid unnecessary and expensive interior demolition.”

You can also read more about Composite Strengthening Systems on our website, or download the brochure.