Fiberglass grating with a concave surface is a type of molded fiberglass-reinforced plastic (FRP) grating designed to provide a combination of slip resistance, structural strength, and long-term durability. The concave surface is created by the natural cooling and curing process during molding, which results in a slightly textured, curved surface across the bearing bars. This surface design offers improved slip resistance compared to smooth surfaces, while being less abrasive than gritted finishes, making it suitable for both industrial and pedestrian use.

Product Description

The concave surface on fiberglass grating is not an added material or coating but an inherent feature of molded FRP grating. As the resin and fiberglass cure inside the mold, the top surface forms a slight inward curve along each bearing bar. This design increases surface contact and traction underfoot, especially in wet or damp environments.

Available in various mesh patterns such as 38x38mm (1.5"x1.5") or mini-mesh styles, fiberglass grating with a concave surface is offered in multiple resin types including general-purpose isophthalic polyester, chemical-resistant vinyl ester, and fire-retardant phenolic. Common panel sizes include 1220x3660mm (4'x12') and 1000x4000mm (1m x 4m), with thickness options ranging from 25mm to 50mm depending on load requirements.

Key Applications

Fiberglass grating with a concave surface is used in many sectors where moderate slip resistance, corrosion resistance, and ease of maintenance are critical. Its key applications include:

• Chemical Plants: Used for walkways and platforms where chemical exposure is frequent and slip resistance is important.
• Wastewater Treatment Facilities: Ideal for high-moisture environments where rust-free, non-slip grating is needed.
• Marine & Offshore Applications: Suitable for ship decks, piers, and docks where sea spray and water exposure are constant.
• Food Processing: Used in areas where moderate cleaning and traction are needed without the abrasiveness of gritted surfaces.
• Pulp & Paper Mills: Deployed in production areas with wet floors and chemical exposure.
• Public Infrastructure: Installed in parks, pedestrian bridges, and industrial staircases requiring safe, low-maintenance surfaces.

Advantages

• Slip Resistance: The concave profile provides reliable anti-slip performance under normal foot traffic, reducing the risk of slips in damp or humid conditions.
• Comfortable Underfoot: Less abrasive than gritted surfaces, making it more suitable for areas where people may kneel, sit, or walk for extended periods.
• Corrosion Resistance: Made from FRP materials that resist chemical attack, saltwater, and UV radiation, far outperforming steel in harsh environments.
• Non-Conductive: Safe for use around electrical systems and in high-voltage areas due to its non-metallic, non-conductive nature.
• Lightweight: Easier and cheaper to handle and install compared to metal grating, reducing labor and transportation costs.
• Long Service Life: Resistant to impact, weather, and corrosion, requiring minimal maintenance over time.

FRP Grating Specifications & Technical Parameters

1.General Specifications

Item	Description
Product Type	Molded FRP Grating / Pultruded FRP Grating
Mesh Size	38x38 mm (1.5"x1.5") / 40x40 mm / Custom
Thickness (Height)	25 mm / 30 mm / 38 mm / 50 mm
Panel Size	1220x3660 mm / 1000x4000 mm / Custom
Open Area	60% – 70% (depending on mesh size)
Surface Options	Gritted / Concave / Smooth / Covered Top
Color	Gray, Yellow, Green, Red, Custom

2. Mechanical Properties (Typical Values)

Property	Value	Test Standard
Tensile Strength	≥ 120 MPa (17,400 psi)	ASTM D638
Flexural Strength	≥ 200 MPa (29,000 psi)	ASTM D790
Flexural Modulus	≥ 7,800 MPa (1.13×10⁶ psi)	ASTM D790
Compressive Strength	≥ 200 MPa (29,000 psi)	ASTM D695
Impact Strength (Izod)	≥ 85 J/m	ASTM D256
Barcol Hardness	≥ 40	ASTM D2583

3. Physical & Chemical Properties

Property	Value	Test Standard
Density	~1.8–2.0 g/cm³	ASTM D792
Water Absorption	< 0.5%	ASTM D570
Flame Retardancy	≤ 25 (Class 1)	ASTM E84
UV Resistance	Available with UV inhibitor	-
Electrical Conductivity	Non-Conductive	-
Thermal Conductivity	~0.25 W/m·K	ASTM C177
Operating Temperature Range	-50°C to +120°C (varies by resin)	-

4. Resin Systems Available

Resin Type	Features	Application Areas
Orthophthalic	General purpose, cost-effective	General industry, flooring
Isophthalic	Improved chemical resistance	Wastewater, food processing
Vinyl Ester	Excellent chemical and corrosion resistance	Chemical plants, offshore, mining
Phenolic	Fire and smoke resistance	Oil & gas, transport, marine

5. Load Table (Example for 38mm Thick Grating)

Span (mm)	Load (kN/m²)	Deflection (mm)
600	5.0	4.5
800	3.5	5.9
1000	2.0	7.6

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