Molded Fiberglass Overview
Marco Molded Fiberglass sets the standard for fiberglass reinforced plastic (FRP) molded grating products, combining unmatched corrosion resistance with high strength, long life and safety. Marco products are proven to deliver years of reliable service, even in the most demanding corrosive conditions. Here in the Molded Fiberglass Overview you will find all the detailed information necessary for your project.
Molded Fiberglass Grating is manufactured in a one piece construction process by interlacing pre-wetted glass reinforcing strands in a liquid resin matrix within a given configuration. Once the resin matrix has cured, the molded grid is removed from the mold. The one piece construction insures that all glass is impregnated with resin. Molded fiberglass grating is chemical resistant and non-sparking. It is commonly used in marine platforms and food processing applications.
Molded Fiberglass FRP Advantages
- High Loaded Strength: Interwoven square mesh construction offers bi-directional strength. This construction allows for increased loading versatility when compared to rectangular mesh. The uniform placement of the continuous glass strands during construction provides superior strength.
- Lightweight & Easy to Install: At about one-fourth the weight of steel, a full panel of our molded grating can easily be lifted and moved by two people, as well as readily cut to fit your applications using a commercial saw instead of industrial-grade equipment.
- Anti-Corrosion, Attractive, & Low Maintenance: Inherent properties in our molded grating, like corrosion/rust resistance from high resin content, and molded-in color and UV resistance means freedom from painting and/or coating, as well as a longer lifespan for your applications.
- Non-Conductive & Non-Sparking: Perfectly suited for electrically hazardous locations or conditions, our molded grating has inherent insulating properties that reduce the risk of electrical shock. It is also well-suited for many applications where sparks can trigger explosion or fire due to combustible gases build-up.
- Fabrication Features: In areas that require circular cuts or areas to be field cut and fabricated, molded square mesh offers great versatility and will often eliminate the need for additional support for cut edges. Another feature is its easy adaptability to evaluated floor systems through use of special leg pedestals. The pedestal flooring system helps compensate for an uneven sub floor or slope.
- Safety Surface: Molded Grating offers an outstanding skid resistant concave surface as an option. A molded-in grit surface is also available to provide sure footing for worker safety, yet its non-porous qualities help eliminate bacterial breeding areas in food applications.
Molded FRP Options
- Phenolic (Type P): Best choice for applications where fire resistance, low smoke, and low toxic fume emissions are critical. Typical applications include: offshore & onshore oil refineries, tunnels, ships and train decks. The Grating has passed the USCG Test for level 2 Performance.
- Vinyl Ester (Type V): Developed to withstand frequent and direct contact in the harshest of chemical environments. Type V is ideal for use in acidic and caustic environments such as chemical plants, waste treatment, and plating applications.
- Isophthalic Polyester (Type I): Industrial grade resin great for environments where fiberglass may occasionally be in contact with harsh chemicals due to splashes or spills.
- Food Grade Isophthalic Polyester (Type F): Ideal for environments in the food and beverage industry where fiberglass grating may frequently be wet or exposed to harsh cleaning products.
- General Purpose Ortho Polyester (Type O): A good general purpose resin great for environments such as food processing plants, dairies, and walkway applications. This resin is available at a reduced cost compared to the premium vinyl ester or Isophthalic polyester resin.
Molded FRP Surface Options
Meniscus Top: The concave surface of Marco Fiberglass meniscus top grating provides superior slip resistant footing in most environments including wet or oily conditions and is the standard surface for all Marco molded gratings.
Integrally Applied Grit Top: The optional grip top of Marco Fiberglass grating has a quartz grit which is integrally applied, cured and sealed onto the surface providing excellent slip resistant footing.
Fabrication Procedures for Molded FRP
- Safety Precautions: When cutting Molded grating, always wear safety goggles to protect your eyes and a dust mask to reduce dust inhalation. Also wear gloves and a shop coat with neck and sleeves taped to prevent skin irritation. Work in a well-lighted and ventilated area.
- Cutting Molded Grating: Depending on the amount (linear feet) of grating to be cut, a variety of shop tools can be used. For best results, use a heavy-duty rotary saw with a masonry, carbide or diamond coated blade. Firm support of the panels will prevent shifting. Turning the panel bottom-side-up gives a smooth surface for the saw to ride on and reduces chipping. Be sure to allow for the blade kerf (3/16″) when measuring.
- Grinding: All cut edges should be ground smooth. Use a coarse grit, open coated (resin) grinding disk.
- Finishing: All cut surfaces should be coated with resin to prevent corrosion of glass fibers. A light coating of two-part resin system or urethane spray paint is satisfactory.
- Installation: Provide for a minimum of 1-1/2″ support around all panel edges. Use type “M” stainless steel (type 316) clips every 48″ (maximum) for full 4′ x 12′ panels, a minimum of four clips for any piece.