Fasteners are essential components for securing molded FRP grating
assemblies. They anchor panels to the supporting structure and, where
required, connect adjacent panels to improve alignment and stability.
Proper fastening is particularly important in pedestrian-accessible
areas, elevated installations, high-vibration environments, and any
application where panel displacement could create a fall, trip, or
equipment hazard.
Installation guidance: As a general best practice, each
grating panel should be secured at all four corners. Additional fasteners
may be required along intermediate supports, panel joints, perimeter
edges, or high-load areas based on panel size, span, vibration, traffic,
wind uplift, and the supporting structure.
The M-Type fastener is the preferred option for most standard molded
grating installations. L-Type, C-Type, WLP-Type, G-Type, J-Type, and
F-Type fasteners are available or may be specified for particular mesh
patterns, support conditions, edge locations, and installation methods.
Available Fastener Types
Preferred Option
M-Type Fastener
The M-Type fastener is the standard hold-down option for most
molded FRP grating installations. Its saddle-shaped upper plate
bears across adjacent load bars while a bolt connects the plate
to a lower anchor, support clip, or drilled structural member.
The M-Type provides dependable clamping pressure, broad
compatibility, straightforward installation, and easy removal
when access beneath the grating is required.
Common Applications
Standard molded grating
Industrial walkways
Platforms
Trench covers
Pedestrian flooring
Primary function: Secures a grating panel to the
supporting structure.
L-Type Fastener
The L-Type fastener is used at panel edges and perimeter
locations where an M-Type saddle cannot bear across two adjacent
load bars. Its angled profile captures a single edge bar while
the lower leg or bolt connects to the supporting structure.
This fastener provides a low-profile edge connection and is
particularly useful where the grating terminates beside a wall,
frame, curb, structural angle, or other obstruction.
Common Applications
Panel perimeters
Edge load bars
Wall interfaces
Framed openings
Restricted-access locations
Primary function: Secures an outside panel edge
to the supporting structure.
C-Type Fastener
The C-Type fastener is primarily used to connect two adjacent
molded grating panels. The opposing clip sections engage the load
bars on each side of the panel joint and are tightened together
with a bolt.
Connecting adjacent panels helps maintain alignment, reduces
differential movement, and minimizes uneven panel edges at the
joint. C-Type fasteners supplement panel-to-support hold-down
fasteners but do not normally replace them.
Common Applications
Panel-to-panel joints
Large floor assemblies
Long walkways
Multi-panel platforms
Alignment control
Primary function: Joins two adjacent grating
panels together.
WLP-Type Fastener
The WLP-Type fastener uses a broad, washer-like top plate that
spans several closely spaced load bars. The wider bearing surface
distributes clamping pressure over a larger portion of the
grating than a conventional M-Type fastener.
It is particularly useful for minimesh, micromesh, closely spaced
mesh, and some covered-grating configurations where the openings
are too small for a standard saddle fastener or where a wider
pressure-distribution plate is preferred.
Common Applications
Minimesh
Micromesh
ADA mesh
Covered grating
Small mesh openings
Primary function: Provides a wide-area hold-down
connection for small-mesh and covered grating.
G-Type Fastener
The G-Type fastener is designed to grip the flange of the
supporting steel member. Its lower component hooks beneath the
flange while the upper plate bears on the grating and is tightened
with a bolt.
This arrangement can eliminate the need to drill through the
supporting steel, making it useful where field drilling is
undesirable, restricted, or impractical.
Common Applications
Steel support flanges
No-drill installations
Retrofit projects
Removable flooring
Structural beams
Primary function: Clamps the grating to a support
flange without drilling the support member.
J-Type Fastener
The J-Type fastener uses a hooked lower section that passes
through the grating and engages beneath a support member, support
flange, load bar, or other structural feature.
It is useful where access to the underside is limited or where a
hook-style connection provides a more practical attachment than a
drilled bolt or conventional lower clip.
Common Applications
Channel supports
Angle supports
Hook-under connections
Retrofit installations
Limited-access locations
Primary function: Hooks beneath a structural
support to secure the grating from above.
F-Type image not currently available.
F-Type Fastener
The F-Type fastener is an internal friction-style fastener
designed to sit down within the molded mesh opening. Its formed
sides engage the tapered load bars and lock beneath the wider
lower portion of the molded bars.
Because molded grating load bars generally taper from a narrower
upper surface to a wider base, the fastener can develop a
mechanical grip inside the mesh without requiring a broad saddle
plate across the top.
This creates a low-profile connection with minimal hardware
projecting above the walking surface. Compatibility depends on
the specific mesh opening, panel depth, load-bar taper, and
fastener dimensions.
Common Applications
Low-profile installations
Internal mesh fastening
Tapered molded bars
Restricted top clearance
Specialty grating assemblies
Primary function: Locks internally within the
molded mesh by gripping the tapered load bars.
Fastener Selection Summary
Fastener
Primary Function
Typical Use
Selection Considerations
M-Type
Standard panel-to-support hold-down connection
General molded grating, walkways, platforms, and trench covers
Confirm compatibility with mesh size, panel depth, support type,
and required bolt length
L-Type
Secures a perimeter or outside load bar
Panel edges, walls, frames, curbs, and restricted locations
Used where a standard saddle cannot span adjacent load bars
C-Type
Connects adjacent grating panels
Multi-panel walkways, platforms, and floor assemblies
Supplements, but does not replace, panel-to-support hold-downs
WLP-Type
Wide-area hold-down for closely spaced mesh
Minimesh, micromesh, ADA mesh, and covered grating
Select the plate size and bolt arrangement for the specific mesh
and panel depth
G-Type
Clamps grating to a support flange without drilling
Steel beams, channels, flange supports, and retrofit projects
Confirm support-flange thickness, flange width, and lower-hook
engagement
J-Type
Hooks beneath a supporting structural member
Angles, channels, beams, and limited-access installations
Confirm hook geometry, support thickness, bolt length, and
underside clearance
F-Type
Locks internally within tapered molded load bars
Low-profile and specialty molded-grating installations
Compatibility depends on mesh opening, panel depth, bar taper,
and the exact fastener geometry
Inspection and maintenance: Fasteners should be inspected
periodically for looseness, corrosion, deformation, missing hardware,
support movement, and panel wear. Inspection frequency should reflect the
application, vibration, traffic, environmental exposure, and consequences
of fastener failure. Replace damaged or significantly corroded hardware
promptly.
