FRP grating surface options — concave/convex, grit top and smooth — trade slip resistance for cleanability; grit top is the safety pick for wet/oil zones, smooth for hygiene.
- Best for: matching surface to wet, oily or hygiene-critical zones
- Choose grit for: slip safety; smooth for: easy clean/food; concave for: drainage
- Key spec: grit top 2–8 mm silica, concave/convex standard profiles
FRP Grating Surface Options
Choosing the right surface is critical for safety and performance. Four standard surface options are available.
1. Concave / Meniscus Surface (Standard)
- Slip resistance: R9-R10 (moderate)
- Features: Curved bar tops, easy to clean
- Best for: General walkways, dry areas, indoor applications
- Cost: Standard
2. Grit / Quartz Surface
- Slip resistance: R13 (maximum)
- Features: Quartz sand embedded in resin, aggressive anti-slip
- Best for: Wet areas, oily environments, offshore, food processing
- Cost: +10-15%
3. Smooth Surface
- Slip resistance: R8 (low)
- Features: Polished smooth top, decorative appearance
- Best for: Architectural applications, low traffic, dry areas
- Cost: Standard
4. Solid Cover Surface
- Slip resistance: R10-R11
- Features: Completely sealed top, waterproof, prevents drops
- Best for: Tank covers, trench covers, areas with falling objects
- Cost: +20-30%
Slip Resistance Ratings (DIN 51130)
- R9: Normal dry areas
- R10: General industrial
- R11: Wet areas
- R12: Very wet/oily
- R13: Extreme slip hazard
Design Standards & Data Basis
All load, span and capacity values in this article are typical/indicative, derived from laboratory tests per NAAMM MBG-01 (FRP Grating Design Manual) methodology. Molded grating values apply a 5:1 factor of safety on ultimate capacity; pultruded grating values apply a 3:1 factor of safety, both measured at static ambient conditions. Impact loads are limited to 50% of stated values; long-term loads require creep adjustment per ASCE Structural Plastics Design Manual. Certified load tables, stamped engineering calculations and third-party test reports are available on request.
For structural sizing of your specific application, contact our engineering team with your load requirements, span and environmental conditions — we provide free structural calculations within 24 hours. Browse our molded grating and pultruded grating product pages for full specifications and resin options.
Model Naming: Thickness x Mesh Reference
ZEALL molded FRP grating is designated by panel thickness x mesh opening. The standard catalog covers four depths (25 / 30 / 38 / 50 mm) and three mesh sizes (38x38, 19x19, 50x50 mm). A typical designation is "38 mm Molded Grating x 38x38 mm mesh" (model code FG-M3838). Common references:
| Model code | Thickness | Mesh | Duty class | Typical use |
|---|---|---|---|---|
| FG-M2538 | 25 mm | 38x38 mm | Light | Drainage covers, light walkways |
| FG-M3038 | 30 mm | 38x38 mm | Medium | General walkways, ramps |
| FG-M3838 | 38 mm | 38x38 mm | Standard | Industrial platforms, standard service |
| FG-M3819 | 38 mm | 19x19 mm | Standard mini-mesh | Tool handling, heel-safe walkways |
| FG-M5038 | 50 mm | 38x38 mm | Heavy | Forklift areas, long spans |
| FG-P5038 | 50 mm I-bar | 38 mm bar spacing | Heavy pultruded | Heavy-duty platforms, truck traffic |
Browse our product pages for full specifications: FRP molded grating.
Frequently Asked Questions
FRP (Fiberglass Reinforced Plastic) grating is a molded or pultruded fiberglass composite grid used for corrosion-resistant walkways, platforms and floorings. It combines glass fiber reinforcement with thermoset resin (polyester, vinyl ester, epoxy) for superior strength-to-weight ratio, zero rust and 20+ year service life.



















