addressing mass timber challenges

On a mission to enhance mass timber performance

The demand for mass timber has never been higher. Residential and Data Center demand is growing. Span demands are increasing, but require deeper sections that increase overall project complexity and cost. GripMetal can potentially introduce a new way to build mass timber that fundamentally shifts what's possible with wood.

Remove span limitations

Remove span limitations

Longer beams & panels. No added depth. Fewer columns. Lower cost. More design freedom. The structural efficiency of steel with the sustainability of wood.

Reduce depths and fiber usage

Reduce depths and fiber usage without sacrificing strength

Mechanical reinforcement transfers metal's tensile capacity & ductility directly into wood, allowing you to use less material, while still meeting structural demands.

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Improved lamstock utilization

Improve lamstock material efficiency and unlock new fiber baskets

GripMetal can possibly enable manufacturers to use lower-grade lumber (L2, L3+) in structural applications that traditionally require premium fiber.

what is gripmetal

How GripMetal Works

What is GripMetal

Wood embedment

Composite benefits

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GripMetal is a thin sheet of metal with thousands of precisely formed hooks covering a single or dual side.

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Forming a single composite material transferring the shear strength, tensile force, and ductility of metal to wood.

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When pressed, the hooks embed into wood fibers, creating a mechanical bond without the need of adhesives

addressing mass timber challenges

GripMetal can unlock new performance advantages for mass timber construction

Longer spans, reduced depths

GripMetal strengthens composite action in bending, allowing beams and panels to span farther without increasing depth. Better stiffness. Fewer columns. More competitive mass timber buildings.

Access to Lower-Grade Fiber

GripMetal transfers tensile and shear capacity into mass timber components, allowing manufacturers to use species and grades previously unsuitable for structural applications.

Eliminate Cure Time

Unlike adhesive systems that require press and cure time, GripMetal creates an instant mechanical bond. Press it once. Move on.

Improved Ductility and Safety

GripMetal makes mass timber assemblies more ductile by preventing sudden, brittle separation between laminations. When timber fibers begin to crack or slip, the mechanically interlocked micro-hooks continue to engage, providing a progressive, energy-dissipating load path. Instead of a sudden failure, the assembly maintains integrity longer and deforms in a more controlled, predictable way.

Fire Performance Maintained

Mass timber’s predictable char layer protects the embedded GripMetal surface, keeping it insulated from rapid temperature rise and preventing the premature failures associated with exposed metal connectors. Because GripMetal lies fully within the wood, it maintains mechanical interlock deeper into a fire event without introducing a heat-bridge to the surface.

No Adhesive Dependencies

Adhesive bondlines introduce variables; surface preparation, moisture, temperature swings, cure behavior, and long-term aging that can affect the consistency of shear transfer. GripMetal eliminates that dependency. Its mechanically embedded micro-hooks grip directly into the wood fibers, creating a stable, predictable shear-transfer interface that performs independently of environmental conditions.

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addressing mass timber challenges

Potential applications of GripMetal in mass timber

Glulam reinforcement

The most direct path to market. GripMetal can be integrated into glulam laminations to increase effective bending stiffness, improve shear transfer, and stabilize lower-grade fiber. By reducing slip and maintaining full composite action, glulam manufacturers can achieve higher moment capacities and longer spans with minimal changes to existing production lines.

CLT & NLT Enhancement

GripMetal improves the structural performance of CLT and NLT by strengthening shear transfer between layers and reducing rolling-shear-driven delamination. Embedded micro-hooks form a mechanical shear bridge between plies, keeping layers engaged under bending, vibration, and seismic cycling. The result is more stable composite action, increased resistance to interlaminar slip, and added ductility at the assembly level.

Hybrid Floor Systems

Pair CLT compression layers with NLT tension layers and lock them together using GripMetal’s mechanical interlock. The embedded micro-hooks create a continuous shear-transfer interface, allowing each layer to contribute its strengths — dense grain in the compression zone up top, efficient dimensional lumber in tension below. The result is a lighter, higher-stiffness composite system optimized across the full depth of the panel.

Explore how to implement GripMetal for your mass timber business

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In the press

Frequently asked questions by AEC professionals

Does GripMetal work with existing production equipment?

Yes. GripMetal integrates with cold-press systems and pinch roller lines. No major capital investment required—just process refinement.

What the cost compared to current methods?

Target pricing is competitive at under $1.50/sq ft. Exact cost depends on application and production volume.

How does it affect CNC machining?

Aluminum GripMetal can be machined with standard tooling. We provide SOPs for safe handling

What about fire ratings?

We are working towards full scale fire testing. Our initial findings show promising data on fire performance, and potentially, enhancement.

Is there a certification pathway?

Yes. Rothoblaas achieved ETA certification in Europe under the brand name “Sharp Metal”. In North America, we are working towards the ICC-ESR process, supported by full-scale testing, manufacturing partners, and engineering validation. We are looking to partner with progressive engineers who can provide stamped designs for demonstration projects under the alternative means and methods provisions of the building code.

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We are collaborating with manufacturers, engineers and design teams to validate use-cases and build the technical foundation for adoption in mass timber

R&D Teams

Validate performance in your lab. Access sample materials and testing support.

Structural Engineers

Specify GripMetal in mass timber demo projects. We'll support technical documentation and material supply.

Manufacturers

Integrate GripMetal into product trials. Test feasibility with your equipment and processes.

Mass Timber Advocates

Architects, engineers, manufacturers and researchers who want to explore what's possible.

Explore opportunities with GripMetal

Schedule a meeting and learn about GripMetal

Request GripMetal product samples

Learn about Manufacturing opportunities

Specify GripMetal on your next project

Tour our facility in Toronto and more

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Headquarters

3370 Pharmacy AvenueToronto ON Canada M1W 3K4

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Contact info

(416) 627-4632
info@gripmetal.com

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