GRP stands for Glass Reinforced Plastic and FRP stands for Fibre-Reinforced Polymer, was born out of the development of continuous glass filament production technology developed in the USA by Owens Corning Fiberglass in 1938. This transformed what had previously been a decorative product into an engineering material, used particularly for the insulation of electric motor windings. The combination of glass cloth manufactured from these glass filaments and thermosetting polyester resins in the early 1940’s led to the creation of glass reinforced plastics, or more specifically, glass reinforced polyesters and the start of the composites industry.
The development of this industry was accelerated by the onset of World War II, when GRP was further developed, commonly using short glass fibres or ‘rovings’ cut from continuous filaments and used for making radomes (the structural spheres that enclose radar antenna), fuel tanks and body armour mouldings; the glass reinforcements providing the high structural strength necessary for these products.
Modern materials for construction
Today there are a wide range of thermoset resins available for use with various glass fibre materials for all sorts of applications. From boat construction such as lifeboats, minesweepers and luxury yachts where high strength, durability and marine corrosion resistance is required, through to fuel and chemical containment tanks & pipelines; GRP materials find uses everywhere. This universal material is also used for vehicle body panels and construction products ranging from door canopies to fine architectural mouldings.
Thermoset materials, once cured, have very stable mechanical properties and are generally unaffected by heat unless this is sufficiently high to cause them to char or burn. This gives the characteristic of relatively low rates of thermal expansion and high durability leading to very long service life periods. By comparison, thermoplastic materials readily soften and lose their strength with increases in temperature until they melt at relatively low temperatures, losing their shape and mechanical properties, setting to a distorted solid state again on cooling. By their very nature they are less stable and less durable.
To improve the durability of GRP when used in outdoor applications and exposed to UV radiation and weathering, the life of the material can be further prolonged by the application of a surface gel coat or transparent surface protective film.The characteristics of GRP make it an ideal product for use in rooflight panels and sheets. Especially where a material is required that can be moulded to match the profiles of the surrounding metal cladding sheets while benefitting from a high strength to weight ratio and extended service life.
Because GRP can be either moulded or continuously profiled, it can be used to match the vast majority of design criteria, from architectural mouldings, to pre-cured, mechanically fixed GRP roof membrane sheets.
This versatility means that GRP can be used to allow specifiers to realise a wide array of design possibilities without having to consider conventional material constraints, such as formability, corrosion, embrittlement etc.
Moulded FRP grating
This type of FRP grating is cast in a mould ( moulded ). It is a composite material consisting of layered fibreglass overcast with a polyester or vinylester resin (65%). The specific production process ensures that this type of Fibreglass Reinforced Plastic grating has optimal strength in two directions. Furthermore, this FRP grating has excellent corrosion resistance. The performance of moulded FRP (GRP) grating is excellent and reliable, even in the most demanding and corrosive conditions. The unique properties ensure it has excellent corrosion resistance in a wide pH range of both acid and corrosive substances.
FRP (GRP) grating, high-strength, safe and very versatile!
The ( moulded ) FRP grating is high-strength, safe (non-slip), low-maintenance and very versatile in use. This type of FRP (GRP) grating is often used for landings, floors, walkways, stair cases and platforms. FRP
grating is highly corrosion-resistant and therefore extremely suitable for use in the most chemically hazardous environments. For example:
- Sewage treatment plants
- The petrochemical industry
- Civil engineering / rail infrastructure
- Power stations
- The chemical industry
- Process-water and drinking-water companies
- The food, drink and tobacco industry
- Waste processing companies
- Incineration plants
- Shipping and offshore industry
- Agricultural sector
The advantages of FRP (GRP) grating
Use of FRP grating contributes significantly to safety, corrosion resistance, durability and low maintenance control of e.g. platforms and installations. Furthermore, FRP grating is also an excellent
alternative to steel, wooden and concrete grating.
- Strong in two directions
- Low-maintenance (Does not rust, does not rot)
- Safe: good non-slip properties
- Easy to process
- Easy to install
FRP grating applications
FRP grating is very versatile in application, e.g. floors, walkways, staircases, landings, platforms, drainage gutters, cable ducts, production and storage spaces, mezzanines, (water) discharge
Cast FRP (GRP) grating is recommended when corrosion and safety are important issues.
FRP/GRP Pultruded gratings are manufactured by assembly of pultruded i-beams & pultruded cross rods. The distance between i-beams & cross rods depends upon various load conditions. The 70% glass to 30% resin ratio of pultruded grating provides twice the stiffness of molded grating, allowing it to span greater distances, with its high fiberglass content and i-bar style bearing bars,
pultruded FRP gratings are offered in a variety of bar profiles and spacing's, including close mesh options that are designed for heavy motor vehicles.
Features of FRP/GRP Pultruded Grating
1. Corrosion Resistant
2. Good Structural Strength
3. High Impact & Fatigue Strength
4. Light Weight
5. Fire Retardant
6. Low Conductivity
7. Easy to Fabricate & Install
8. Resistant to Chipping & Cracking
9. Aesthetically Pleasing Appearance
10. Low-Thermal Conductivity
11. Anti – Skid
12. Non – Sparking
Application of Fiberglass Grating
- Oil & Gas
- Pollution Control
- Power Plants
- Pulp & Pater
- Building Construction
- Water Treatment Plants
Why Fiber Tech FRP/GRP Grating
1. CORROSSION RESISTANT – It gives resistance against almost all chemicals & in most
2. LIGHT WEIGHT – Density compared to steel is 4 times less.
3. NON CONDUCTIVE – It does not carry any electric current.
4. MAINTENANCE FREE –no rework like painting or cleaning required.
5. LIFE CYCLE – long durability ensures lowest in life cycle cost.
6. EASY TO INSTALL – no welding required while installing.
7. AESTHETIC – attractive colour improves plant look.
8. EASY TO CLEAN – totally washable as it is completely rust & corrosion proof.
9. UV RESISTANT – Inbuilt UV resistance gives protection from direct sunlight exposure.
10. LOW INSTALATION COST – Being light weight, it can be installed by anybody.
11. No rusting No painting required as the colour is inbuilt and different colour options are
available to suit your plant colour.
12. Very high strength to weight ratio which helps in structural saving
13. It is resistant to microbial growth.
We can advise you on the type of grating, a grating installation plan and customization, entirely without obligation.