Fiberr USA offers several surface finishes for molded FRP/GRP grating,
designed to meet safety, durability, cleanability, comfort, containment,
and application-specific requirements.
Surface selection should consider anticipated foot traffic, moisture,
contaminants, footwear, barefoot use, cleaning requirements, drainage,
spill containment, and the required level of slip resistance.
Open-Grating Surface Options
Standard Surface
1. Concave/Meniscus Surface
The concave or meniscus surface is formed naturally during the
molding and curing process. The upper surface of each load bar
develops a shallow concave profile that provides inherent slip
resistance without an additional coating or secondary treatment.
This finish provides a practical balance of traction, drainage,
durability, ease of fabrication, and cost efficiency for general
industrial and commercial service.
Common Applications
Industrial walkways
Platforms
Maintenance access
Trench covers
Commercial flooring
Figure 52: Concave/Meniscus Surface
Figure 53: Gritted Surface
2. Gritted Surface (Post-Cure)
A gritted surface is a high-friction finish produced by applying
grit to the molded grating after the panel has cured. The grit is
bonded to the upper walking surface to provide substantially
greater traction than the standard concave finish.
This surface is recommended where moisture, oils, process
residue, frequent traffic, ramps, or other operating conditions
create an increased slip hazard.
The standard concave surface is mechanically sanded or processed
to produce a flatter and smoother upper surface. This removes much
of the natural meniscus profile and provides a more uniform
appearance.
A sanded surface is easier to clean and may be selected for
architectural, decorative, interior, hygienic, or light-duty
applications where appearance and cleanability are more important
than maximum traction.
Common Applications
Architectural flooring
Interior applications
Decorative installations
Clean environments
Light pedestrian use
Figure 55: Sanded & Gritted (Barefoot) Surface
4. Sanded & Gritted Surface
This finish combines a flattened, sanded surface with a finer
grit intended to improve traction while remaining more
comfortable for barefoot or light pedestrian use than a coarse
industrial grit.
It is particularly suited to recreational and waterfront
applications where wet conditions require enhanced slip
resistance but user comfort remains important.
A covered surface consists of a solid FRP plate bonded to the top of the
molded grating. The cover adds approximately 1/8 in (3 mm) to the overall
panel thickness and creates a closed walking or working surface while the
underlying molded grating provides structural support.
Figure 56: Smooth Covered Grating
5.1 Smooth Cover
A flat solid plate is bonded to the molded grating to provide a
closed, smooth surface. This finish supports easy cleaning, prevents
small objects from passing through the panel, and provides a
continuous working surface.
Common Applications
Clean areas
Equipment floors
Containment areas
Interior platforms
Closed-surface walkways
Figure 57: Diamond-Plate Covered Grating
5.2 Checker/Diamond Cover
A checker-pattern or diamond-pattern plate is bonded to the molded
grating. The raised texture provides additional surface traction,
increases surface rigidity, and creates the appearance of
traditional industrial diamond plate without the corrosion or
electrical conductivity of metal.
Common Applications
Industrial platforms
Equipment access
Utility floors
Service corridors
Closed trench covers
Figure 58: Gritted Covered Molded Grating
5.3 Gritted Cover
A solid cover plate is finished with a high-traction grit surface.
The grit may be integrated pre-cure during manufacture or applied
post-cure, depending on the required texture, wear resistance, and
performance characteristics.
Covered molded grating is recommended for applications requiring a closed
surface, containment of spills or debris, separation between operating
levels, or environments where open cells are not appropriate.
Surface Option Comparison
Surface Option
Primary Benefit
Typical Applications
Selection Considerations
Concave/Meniscus
Standard inherent traction with no secondary surface treatment
General walkways, platforms, trench covers, and maintenance access
Appropriate for general service where enhanced grit traction is
not required
Gritted
High traction in wet or contaminated conditions
Ramps, industrial flooring, wet-process areas, and high-traffic
routes
Select grit size based on footwear, contaminants, cleaning, and
required traction
Sanded/Smooth
Improved cleanability and a flatter architectural appearance
Interior, decorative, hygienic, and light pedestrian applications
Provides less traction than concave or gritted surfaces
Sanded & Gritted
Slip resistance with improved barefoot comfort
Docks, pool decks, marinas, boardwalks, and recreational areas
Fine grit should be selected to balance comfort and wet traction
Smooth Cover
Closed, easy-to-clean continuous surface
Equipment floors, containment areas, and closed walkways
Confirm drainage, cleaning, and slip-resistance requirements
Checker/Diamond Cover
Closed surface with raised mechanical texture
Utility floors, industrial platforms, and access corridors
Offers moderate texture but may not replace grit in severe
slip-hazard areas
Gritted Cover
Closed surface with maximum traction
Wet industrial floors, ramps, containment areas, and loading
platforms
Specify pre-cure or post-cure grit and appropriate aggregate size
