FRP composite grating with metal inserts blends Fiberglass Reinforced Plastic’s corrosion resistance and light weight with metal’s structural rigidity. This hybrid material integrates steel or aluminum inserts into the FRP matrix, redefining performance in environments requiring both strength and durability.​
Manufactured via pultrusion, glass fibers impregnated with resin form the base, with pre-shaped metal inserts (flat bars, channels) embedded during production. Encapsulated by FRP, the metal core creates a monolithic structure, enhancing load-bearing capacity, dimensional stability, and impact resistance while retaining FRP’s corrosion resistance.​
The metal insert acts as a load-bearing backbone, boosting flexural strength by up to 50% compared to pure FRP. This suits long-span applications or high-point loads. The metal core also mitigates FRP’s thermal expansion, improving stability in fluctuating temperatures.​
Corrosion resistance is maintained as the metal is fully encapsulated. FRP acts as a barrier against chemicals, UV, and pollutants, outperforming traditional metal gratings in harsh environments and reducing maintenance costs.​
Design flexibility allows customization of metal insert materials (stainless steel, aluminum), shapes, and placement. Anti-slip surfaces enhance safety, and the composite is easily fabricated for on-site modifications.​
Applications include oil refineries, maritime infrastructure, and power plants, where it combines corrosion resistance with heavy-load capability. In offshore rigs, it withstands saltwater while supporting heavy equipment; in power facilities, its non-conductive FRP layer ensures safety.​
Though initially costlier than pure FRP, reduced structural supports and minimal maintenance yield long-term savings. With a lifespan exceeding 30 years, it outperforms uncoated metal gratings.​
Sustainability benefits include recycled materials in FRP and metal inserts, reduced transportation emissions, and simplified recycling due to separable components.​
This hybrid grating merges composite and metal advantages, addressing modern infrastructure needs. Advancing integration technologies will further solidify its role in durable, high-performance construction.