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FRP Fabrication and Repair Best Practice for Treadwell Systems
This Tech Talk Tuesday session walks through practical best practices for FRP fabrication and repair on-site. It explains how to cut and drill FRP, how to assemble bolted connections, why resin resealing matters, and how to manage dust and handling so that Treadwell FRP structures achieve their full design life.
Treadwell also supports installers with published fabrication guidance and technical product literature for its FRP grating, structural profiles and access systems
Key Benefits
- Cleaner, faster cutting on site.
Using continuous rim diamond blades on circular saws, drop saws, or grinders gives a smoother edge, less burring and better dimensional accuracy than timber blades or segmented concrete blades, which dull quickly on glass fibre and leave rough edges. - Longer tool life and neater holes
Tungsten carbide or carbide-tipped drill bits behave similarly to drilling hardwood and last far longer than standard high-speed steel bits, which need frequent sharpening when used on glass-reinforced profiles and grating. - Robust bolted connections with low maintenance
FRP is a thermoset material that does not melt, so connections are typically mechanical. Using stainless or hot dip galvanised fasteners, Nylock nuts, anti-seize on stainless threads and flat washers on both sides of the connection delivers durable, low maintenance joints that tolerate vibration and service loads. - Extended service life through resin resealing
Resealing cut edges and drilled holes with a compatible resin sealer helps prevent moisture ingress, chemical attack at exposed glass fibres and visual lightening of cut surfaces, which supports long-term structural performance and maintains a consistent appearance. - Safer, simpler on-site work
FRP can be cut and drilled without hot work permits, produces no sparks and is lighter to handle than steel, which reduces manual handling risks and simplifies installation in live plants or sensitive environments.
Applications
- On-site cutting of FRP grating, structural sections and handrail
- Use diamond blades on circular or drop saws for straight cuts to size grating panels, beams and handrail tube.
- Use grinders, jigsaws or reciprocating saws with diamond blades for more intricate trimming or penetrations.
- Where available, water jet cutting provides very clean factory cuts with minimal dust.
- Precise drilling and fixing of FRP components
Drill with tungsten carbide bits at speeds similar to hardwood, avoiding excessive heat buildup.
Avoid punching or shearing FRP sections where possible so that glass fibres are not crushed or damaged.
Use stainless or hot-dip galvanised bolts, with Nylock nuts or threadlocker where vibration is expected.
Place flat washers under both bolt head and nut, and consider anti-crush inserts or oversize washers on hollow sections where higher torque is required.
- Assembly and repair of FRP platforms and handrails
Assemble platforms, walkways and handrails with bolted connections rather than welding, using FRP-specific span and fixing details from Treadwell design literature.
For damaged sections, repairs can often be completed by competent trades with basic fibreglass skills, following a defined procedure that may include cleaning, chasing out cracks, filling and laminating over with glass and resin.
- Resin sealing of cut and drilled areas
After cutting or drilling, brush on a compatible polyester or vinyl ester sealer kit to all exposed FRP edges and around holes.
This helps limit moisture tracking into the section, protects against chemical exposure in aggressive environments and restores the original colour of cut edges.
- Safe handling and dust management
Wear appropriate PPE such as safety glasses, hearing protection, gloves and a P2 respirator when cutting or grinding.
Control dust with wet cutting where equipment allows, or with local vacuum extraction similar to indoor concrete cutting setups.
Take advantage of the lower weight of FRP compared to steel to reduce lifting risks and simplify installation staging.
Key Moments
- 00:54 👋 Welcome to Tech Talk Tuesday, held bi-weekly, covering various FRP topics including fabrication and repair.
- 02:32 📚 A detailed FRP fabrication manual is available for download, offering comprehensive cutting, drilling, and repair guidance.
- 03:05 ⏱️ Proper cutting and drilling procedures can reduce fabrication time and extend the lifespan of FRP structures.
- 03:42 🦺 Safety first: Always use appropriate PPE, including safety glasses and gloves, when working with power tools.
- 05:30 ⚙️ Diamond blades are recommended for cutting FRP, as they provide a cleaner finish and last longer than carbide tip saws.
- 07:25 💨 Dust control is important when cutting FRP; wet cutting or using vacuum dust extraction can help manage it effectively.
- 08:08 🔩 For drilling FRP, tungsten carbide bits are optimal, offering better durability than standard high-speed steel bits.
- 09:34 🔧 FRP connections are primarily bolted; it's crucial to use the correct fixing types and anti-seize to prevent binding.
- 11:38 🛠️ Adding flat washers to bolted connections increases torque capacity and minimizes structural risk.
- 14:20 🖌️ Resealing cut edges with a brush-on resin treatment helps prevent moisture infiltration and enhances the visual appearance of FRP.
- 17:04 📑 More information on fabrication and repair practices can be found in the detailed guide available on the company's website.
- 19:11 👷♂️ Basic FRP repairs can usually be handled by carpenters or boiler makers, while complex repairs may require specialized skills.
- 22:40 🎨 FRP can be visually rebanded, though this is not necessary for structural purposes, unlike steel.
Why Treadwell?
Treadwell focuses specifically on FRP access systems, so its fabrication and repair guidance is built around real projects in industrial, marine and public infrastructure environments. The company provides:
- Integrated systems covering grating, structural profiles, handrail and fixings that are designed to work together.
- Technical support from engineers and fabrication specialists who can review cutting, drilling, fixing and repair approaches for specific sites.
- Published product guides and fabrication resources that capture accepted industry practice for FRP machining, drilling and sealing, aligned with relevant Australian standards where applicable.
By following the fabrication, fixing and resealing practices outlined in this session, specifiers, fabricators and maintenance teams can get the best out of Treadwell FRP systems in both new installations and repairs.
