Load path
Bidirectional molded reinforcement
Square-mesh panels can be oriented or field-cut without creating a single pultrusion load direction.
Molded Grating · F1-GRID-M
Molded FRP Grating Manufacturer — Square Mesh, Mini Mesh & 316SS Clips
Molded fiberglass grating in square mesh, mini mesh and rectangular mesh configurations — with manual-verified panel sizes, nominal weights, open area and matched M/C/J installation clips.
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Two-Way Molded Construction
Molded mesh for cutouts, corrosive duty and multidirectional layouts
Molded fiberglass grating is cured as one panel with glass reinforcement running in both directions. It is the F1-GRID choice when the layout contains frequent penetrations, loads can approach from more than one direction, or the project needs resin-rich corrosion performance with a wide choice of square and mini meshes.
The supplied manual describes interlaced glass roving in a polyester-resin mold, thermally cured to a finished panel with 30–35% glass content by total weight. Its fire-retardant formulation is described as ASTM E84 Class 1 with a flame-spread index of 25 or less. Those are catalog construction references; the resin, fire report and batch documentation named in the F1 order govern the delivered product.
Catalog depth range
13–65 mm
Standard and high-depth rows are listed by mesh, bar thickness, panel format, nominal weight and open area.
Catalog glass content
30–35% by total weight
The supplied manual describes interlaced glass roving thermally cured in a resin-filled mold.
Walking surfaces
Square mesh · mini mesh · grit top
Select the opening and surface against drainage, heel resistance, slip, cleaning and project access rules.
Manual-Verified Specifications
Molded grating mesh, depth, panel size, weight and open area
The matrix below transcribes the principal square-mesh and mini-mesh production rows from the supplied molded-grating manual. Dimensions are millimeters; weight is nominal kg/m². Use these values to shortlist tooling, then obtain the F1 quotation, certified datasheet and approved panel-layout drawing for the project release.
38.1 × 38.1 mm square mesh
Standard industrial square mesh; HD rows are high-depth configurations.
38.1 × 38.1 mm square mesh
Standard industrial square mesh; HD rows are high-depth configurations.
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 13 | 6.0 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 6.1 | 78% |
| 15 | 6.0 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 7.1 | 78% |
| 20 | 6.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 9.6 | 68% |
| 25 | 6.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 12.3 | 68% |
| 30 | 6.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 14.6 | 68% |
| 38 | 7.0 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 19.5 | 68% |
| 40 | 7.0 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 20.6 | 68% |
| 50 (HD) | 9.5 / 7.5 | 1220 × 3660; 1220 × 2440; 921 × 3050 | 40.0 | 56% |
| 60 (HD) | 10.5 / 8.5 | 1220 × 3660; 1220 × 2440; 921 × 3050 | 48.0 | 54% |
| 65 (HD) | 11.0 / 9.0 | 1220 × 3660; 1220 × 2440; 921 × 3050 | 52.0 | 52% |
40 × 40 mm square mesh
40 × 40 mm square mesh
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 25 | 7.0 / 5.0 | 1007 × 3007; 1007 × 4007; 1247 × 3687; 1527 × 4047 | 12.3 | 67% |
| 30 | 7.0 / 5.0 | 1007 × 3007; 1007 × 4007; 1247 × 3687; 1527 × 4047 | 14.5 | 67% |
| 40 | 7.0 / 5.0 | 1007 × 3007; 1007 × 4007; 967 × 2967; 1527 × 4047 | 19.2 | 67% |
50.8 × 50.8 mm square mesh
50.8 × 50.8 mm square mesh
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 13 | 6.0 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 5.8 | 82% |
| 15 | 7.0 / 6.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 6.8 | 82% |
| 25 | 7.5 / 6.0 | 1220 × 3660; 1220 × 2440 | 11.8 | 78% |
| 40 | 7.0 / 5.0 | 1788 × 4531; 1220 × 3660; 1220 × 2440; 921 × 3050 | 17.8 | 78% |
| 50 | 7.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 21.5 | 78% |
| 50 | 8.0 / 6.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 23.5 | 78% |
83 × 83 mm large-open mesh
83 × 83 mm large-open mesh
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 25 | 7.0 / 5.0 | 1007 × 4007; 1173 × 4007 | 6.1 | 84% |
| 40 | 7.0 / 5.0 | 1007 × 4007; 1173 × 4007 | 9.6 | 84% |
19.05 × 19.05 / 38.1 × 38.1 mm mini mesh
Small top opening for pedestrian and heel-resistant layouts; verify the governing accessibility requirement.
19.05 × 19.05 / 38.1 × 38.1 mm mini mesh
Small top opening for pedestrian and heel-resistant layouts; verify the governing accessibility requirement.
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 25 | 6.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 16.8 | 30% |
| 30 | 6.5 / 5.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 18.5 | 30% |
| 38 | 6.5 / 5.0 | 1220 × 3660; 1220 × 2440; 921 × 3050 | 23.5 | 30% |
25.4 × 25.4 / 50.8 × 50.8 mm mini mesh
25.4 × 25.4 / 50.8 × 50.8 mm mini mesh
| Depth (mm) | Bar top / bottom (mm) | Standard panel sizes (mm) | Weight (kg/m²) | Open area |
|---|---|---|---|---|
| 15 | 6.5 / 5.0 | 1220 × 3660; 1220 × 2440; 921 × 3050 | 7.5 | 55% |
| 50 | 8.0 / 6.0 | 1524 × 4000; 1220 × 3660; 1220 × 2440; 921 × 3050 | 28.5 | 55% |
Additional catalog mesh families
These additional molds appear in the supplied manual. Request the exact row and project load table before specifying.
20 × 20 / 40 × 40 mm mini mesh
Catalog depths: 14, 22, 30, 40, 60 mm
26 × 26 / 52 × 52 mm mini mesh
Catalog depths: 30, 38 mm
13 × 13 / 40 × 40 mm mini mesh
Catalog depths: 22, 30, 40 mm
25 × 100 mm rectangular mesh
Catalog depths: 25, 30 mm
25.4 × 101.6 mm rectangular mesh
Catalog depths: 25, 25 HD, 38 mm
38.1 × 101.6 mm rectangular mesh
Catalog depths: 38, 50 mm
25.4 × 152.4 mm rectangular mesh
Catalog depths: 38 mm
38.1 × 152.4 mm rectangular mesh
Catalog depths: 38 mm
25.4 × 50.8 mm rectangular mesh
Catalog depths: 38, 50 mm
60 × 100 mm rectangular mesh
Catalog depths: 28 mm
60 × 220 mm rectangular mesh
Catalog depths: 40 mm
Catalog Hardware Reference
Molded grating connectors and hold-down hardware
The catalog hardware photograph shows the wider grating-fastener family. For this molded-grating page, F1 publishes only the applicable M hold-down, C panel connector and J support-hook functions below. The photograph is a visual reference, not a promise that every pictured geometry is a stocked F1 SKU.
Molded Grating · 316SS Hardware
M, C, and J clips for molded FRP grating
F1 molded-grating clip kits separate panel hold-downs from panel-edge connectors. Select the hardware from the mesh, panel depth, support detail and installation access, then issue the exact assembly on the approved panel-layout drawing. The diagrams explain compatibility and load path only — they are not fabrication dimensions.
M, C, and J are F1-GRID molded-grating product definitions. A C connector joins compatible molded-panel edges but does not replace support or each panel's independent hold-downs.
F1-GRID clip M
M hold-down clip
Seats across two adjacent grating bars to hold an open-mesh panel to its supporting member.
- Material
- 316 stainless steel (316SS)
- Connection
- Panel to support
- Compatible
- Molded grating · Pultruded grating
- Installation
- Use only where the clip seats fully on the selected mesh or bearing-bar profile and the approved support attachment can be installed and inspected.
Boundary: Panel depth, bar profile, support geometry, and access determine the final hardware arrangement.
F1-GRID clip C
C panel connector
Connects adjacent molded-grating panel edges to control relative movement and maintain alignment at the joint.
- Material
- 316 stainless steel (316SS)
- Connection
- Panel edge to panel edge
- Compatible
- Molded grating
- Installation
- Install only between compatible molded-panel edges at locations shown on the approved panel-layout drawing.
Boundary: A C connector is not structural support and is not a panel-to-support hold-down. Each panel must remain independently supported and secured.
F1-GRID clip J
J support-hook clamp
Pairs a lower J hook with an approved upper clip and fastener to clamp the panel to a support flange without drilling the support frame.
- Material
- 316 stainless steel (316SS)
- Connection
- Panel to support
- Compatible
- Molded grating · Pultruded grating
- Installation
- Match the approved variant to the molded mesh or pultruded open area and to the support-flange geometry, with the lower hook fully engaged below the flange.
Boundary: The J hook and upper clip are not universal; the approved drawing must match the grating opening, support flange, fastener, and installation access.
Installation and spacing principles
- 1Select the clip from the grating family, panel depth, bearing-bar or mesh geometry, support detail, and installation access — not from the letter alone.
- 2Locate panel-to-support hold-downs at supporting members. A C panel connector aligns adjacent molded-panel edges but does not replace support or a hold-down.
- 3Review the support and hold-down layout again after field cuts, penetrations, or unsupported panel edges are introduced.
- 4The approved project drawing governs final clip geometry, bolt and washer selection, quantity, spacing, edge clearances, and tightening requirements.
Typical starting layout
General coordination values before project-specific fastening design.
- Each support line
- Minimum 2 panel-to-support hold-downs
- Each panel
- Minimum 4 panel-to-support hold-downs
- Along a support
- 1200 mm / 4 ft maximum between hold-downs
- C connectors
- Typically 600–900 mm / 2–3 ft along an adjacent molded-panel joint
- Bearing at support
- 38 mm / 1.5 in minimum bearing length
These are general starting coordination values, not a final fastening design. The approved project drawing, project engineer, grating series, support condition, and applicable manufacturer requirements control the final layout.
Combined CAD detail
F1 Molded Grating Clips — M/C/J (316SS)
One family-specific DXF containing the M/C/J typical installation details and F1 SKU references. Project-specific geometry remains governed by the approved project drawing.
Download M/C/J DXFFree DXF · no login · verify revision before issue for construction
Final clip geometry, bolt and washer selection, quantity, spacing, edge clearances, and tightening requirements must be shown on the approved project drawing. The clip guide does not change the grating span, bearing, support, or connection design checks.
Separate product family
Need longer one-way spans or I-bar / T-bar panels?
Pultruded grating now has its own page, specification table and M/J/T clip selection so its bearing-bar data is not mixed with molded mesh.
Related FRP products
Applications
Frequently Asked Questions
What is molded FRP grating?
Molded FRP grating is a one-piece panel made by placing continuous glass-fiber reinforcement in both directions of a mold and curing it in a resin matrix. That two-way architecture is the key difference from pultruded grating, whose bearing bars primarily carry load in one direction.
Which molded grating mesh should I specify?
Use 38.1 × 38.1 mm or 40 × 40 mm square mesh for general industrial platforms; 50.8 × 50.8 mm or 83 × 83 mm when higher open area is important; and mini-mesh configurations when the top opening must be reduced for pedestrian access. The final choice must also satisfy the required load table, support spacing, drainage, slip resistance and local accessibility rules.
Are the panel sizes and weights on this page certified design values?
They are nominal production-catalog values transcribed from the supplied molded-grating manual. Use them for product selection and logistics planning. The F1 quotation, approved panel-layout drawing and order-specific certified datasheet control final dimensions, tolerances, resin, surface, load capacity and delivered weight.
Can molded fiberglass grating be cut around pipes and equipment?
Yes. Its bidirectional reinforcement makes molded grating well suited to field cutouts and irregular layouts. Every cut still needs adequate bearing and cut-edge support; seal exposed cut surfaces with a compatible resin and re-check the hold-down layout on the approved installation drawing.
Which clips are used with molded FRP grating?
F1 uses M hold-down clips for compatible panel-to-support connections, C connectors between adjacent molded-panel edges, and J support-hook assemblies where the approved detail clamps around a support flange without drilling it. C clips do not replace structural support or each panel's independent hold-downs.
Are molded grating clips available in 316 stainless steel?
Yes. The F1 M/C/J clip kits shown here are specified in 316 stainless steel. Clip geometry, bolt length, complete fastener assembly, quantity and spacing are selected against the panel depth, mesh, support flange and installation access, then issued on the approved project drawing.
When should I choose pultruded instead of molded grating?
Choose pultruded FRP grating when the design is governed by longer one-way spans, higher stiffness in the bearing-bar direction, dedicated I-bar or T-bar series, or structural deck-panel options. Use the separate pultruded FRP grating page so its bearing-bar data and M/J/T clips are not mixed with molded mesh specifications.
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