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FRP Grating Specifications, Load Data and Selection Guide
Grating Specifications and Related Product Lines
This page covers specifications and load data for molded and pultruded FRP grating. The overview below groups the related supply scope by product line so engineering and procurement teams can compare them side by side.
Molded FRP Grating
Molded construction with a regular mesh pattern for platforms, walkways and trench covers; mesh and resin system can be selected to match load-bearing and corrosion requirements.
Pultruded FRP Profiles and Grating
Pultruded profiles and grating offer stable longitudinal strength for long-span support structures and are often combined with molded grating in industrial platforms and stair systems.
Industrial Technical Services
Greenlogy TEC also provides DCS control systems, industrial software (ERP / CRM) and website engineering, supporting projects from material selection to system integration.
For specifications or selection advice matched to your project, please reach us via www.niteck.com.
Frequently Asked Questions
Where is molded FRP grating normally used?
The molded process gives the grating a regular mesh pattern, and this page lists platforms, walkways and trench covers as typical applications. The mesh and resin system can be chosen to match load-bearing and corrosion resistance requirements. Detailed parameters are available on request.
How do I choose between pultruded and molded FRP grating?
According to this page, pultruded profiles and gratings offer stable longitudinal strength and suit long-span support structures. Molded grating has a regular mesh pattern and is commonly used for platforms, walkways and trench covers. The two are often combined in industrial platforms and stair systems.
Can you supply deflection data at supports for structural checking?
This page covers deflection data at supports for Greenlogy TEC molded and pultruded FRP gratings, so that engineering design and procurement comparison can be carried out. You can contact us through www.niteck.com to discuss parameters for a specific project.
Can the resin system and mesh size be selected for my project?
This page states that different mesh and resin systems can be selected according to load-bearing and corrosion resistance requirements for platforms, walkways and trench covers. The available options should be discussed with us against your actual service conditions.
Besides FRP grating, what related products or services does the company offer?
Greenlogy TEC's main product lines are molded FRP grating, pultruded FRP profiles and grating, plus steel grating and wire rope products. The company also provides industrial technical services such as DCS control systems, industrial software (ERP / CRM) and website engineering, supporting projects from material selection through system integration.
How can I get the detailed specifications and selection advice?
This page is an overview of specifications and selection support; for specific parameters or selection advice, please contact Greenlogy TEC through the official website www.niteck.com. We can then discuss your load, span and corrosion environment in more detail.
FRP Grating Specifications and Selection Support
This page provides specifications, mesh and resin selection, and deflection data at supports for Greenlogy TEC molded and pultruded FRP gratings, to facilitate engineering design and procurement comparison. Below is an overview of related product lines and services; for detailed parameters, please contact us for further discussion.
Molded FRP Grating
Made with a molded process, with a regular mesh pattern, suitable for platforms, walkways, and trench covers, and different mesh and resin systems can be selected according to load-bearing and corrosion resistance requirements.
Pultruded FRP Profiles and Grating
Profiles and gratings produced by the pultrusion process have stable longitudinal strength, suitable for long-span support structures, and are often used in combination with molded gratings for industrial platforms and stair systems.
Industrial Technical Services
Greenlogy TEC also provides DCS control systems, industrial software (ERP / CRM), and website engineering and other technical services, and can assist customers with project requirements from material selection to system integration.
To obtain specific specification parameters or selection advice, please contact us via the official website www.niteck.com.
This document covers the molded and pultruded FRP grating we supply. Use it to select a mesh and a resin system, and to read the deflection at your support span.
- 1 . Molded grating - mesh and panel data
- 2 . Pultruded grating - series data
- 3 . Resin systems, flame class and oxygen index
- 4 . Load and deflection data
- 5 . How to use these tables
1 . Molded grating - mesh and panel data
Bar thickness is given as top / bottom. Open area affects drainage and ventilation; weight affects the support structure you need.
Molded grating meshes
| Mesh | Bar thickness top / bottom (mm) | Open area | Weight (kg/m²) | Panel sizes (mm) |
|---|---|---|---|---|
| 19*19H30 | 6.5 / 5.0 | 40% | 19.1 | 1220 x 4000, 1220 x 3660, 1220 x 2440, 915 x 3050 |
| 38*38H30 | 6.0 / 5.0 | 68% | 14.6 | 1524 x 4000, 1220 x 4000, 1220 x 3660, 1220 x 2440, 915 x 3050 |
| 50*50H50 | 8.0 / 6.0 | 78% | 23.7 | 1800 x 4000, 1524 x 4000, 1220 x 3660, 1220 x 2440, 915 x 3050 |
| 38*152H38 | 8.0 / 6.0 | 67% | 15.92 | 1220 x 3660, 1220 x 2440, 915 x 3050 |
| 38*38H50 | 11 / 9.0 | 56% | 42 | 1220 x 4000, 1220 x 3660, 1220 x 2440, 915 x 3050 |
| 25*152H38 | 7.0 / 5.0 | 62% | 23.1 | 565 x 3050 (stair tread panel) |
2 . Pultruded grating - series data
Pultruded grating carries load along one axis only. Plan the bearing bar direction before ordering.
Pultruded grating series
| Series | Load bar depth (mm) | Open area | Weight (kg/m²) | Panel sizes (mm) |
|---|---|---|---|---|
| I-4010 | 25 | 50% | 17.8 | 1220 or 915 wide x 3050 or 6100 long |
| HL-4020 | 50 | 40% | 70.37 | 1220 or 915 wide x 3050 or 6100 long |
| T-1210 | 25 | 12% | 14.5 | 1220 or 915 wide x 3050 or 6100 long |
| T-1215 | 38 | 12% | 19.6 | 1220 or 915 wide x 3050 or 6100 long |
| T-5020 | 50 | 50% | 15.66 | 1220 or 915 wide x 3050 or 6100 long |
3 . Resin systems, flame class and oxygen index
The number in a system code is the ASTM E84 flame spread index: a lower figure means the material spreads flame less, and 25 or less is the threshold normally specified as Class 1. Oxygen index is a separate measure of ignitability. Choose the resin by the chemical environment first; the chemical resistance document gives the data medium by medium.
Resin systems
| Our code | Base resin | ASTM E84 flame spread | Oxygen index | Specified for |
|---|---|---|---|---|
| VEFR-25 | Vinyl ester | 25 max | 28 min | Severe acids and alkalis; heavy-duty chemical service |
| VEFR-10 | Vinyl epoxy resin | 10 max | 35 min | As VEFR-25 where flame resistance also matters |
| IFR-25 | Isophthalic polyester | 25 max | 28 min | General industrial service, moderate chemical duty |
| IFGR-30 | Isophthalic polyester, food grade formulation | 30 max | 26 | Food processing areas |
| OFR-25 | Orthophthalic polyester | 25 max | 28 min | Water, sea water and neutral salts |
| OFR | Orthophthalic polyester | not rated | - | Non flame-retardant applications |
| MP-5 | Phenolic | 5 max | typically 80 | Maximum flame resistance and low smoke |
4 . Load and deflection data
Deflection is given in millimetres for the stated span and load. The limit load column is the failure threshold and must not be used as a working load.
19x19H30 - linear load, deflection (mm)
| Span (mm) | 75 kg/m | 150 kg/m | 300 kg/m | 450 kg/m | 750 kg/m | 1500 kg/m | Limit load (kg/m) |
|---|---|---|---|---|---|---|---|
| 300 | <0.25 | <0.25 | 0.25 | 0.51 | 0.76 | 1.52 | 9923 |
| 450 | 0.25 | 0.51 | 1.02 | 1.52 | 2.54 | 3.92 | 4827 |
| 600 | 0.51 | 1.27 | 2.29 | 3.56 | 5.84 | 7.38 | 4112 |
| 750 | 1.27 | 2.54 | 4.83 | 7.37 | 12.4 | 16.0 | 3174 |
| 900 | 2.27 | 4.54 | 9.08 | 13.6 | 18.7 | 22.1 | 2637 |
19x19H30 - uniform load, deflection (mm)
| Span (mm) | 350 kg/m² | 500 kg/m² | 750 kg/m² | 1000 kg/m² | 1500 kg/m² | 2500 kg/m² |
|---|---|---|---|---|---|---|
| 300 | 0.29 | 0.48 | 0.57 | 0.75 | 1.15 | 1.82 |
| 450 | 0.78 | 1.19 | 1.81 | 2.47 | 3.54 | 4.95 |
| 600 | 1.76 | 2.66 | 4.28 | 5.56 | 8.41 | 13.2 |
| 750 | 3.48 | 5.12 | 8.21 | 11.0 | 16.4 | — |
| 900 | 5.89 | 8.81 | 14.2 | 18.9 | — | — |
50x50H50 - limit load, linear (kg/m)
| 50*50H50 limit load | 300 mm | 600 mm | 900 mm | 1200 mm |
|---|---|---|---|---|
| Linear (kg/m) | 21727 | 11713 | 7780 | 5834 |
38x152H38 - limit load, linear and uniform
| 38*152H38 limit load | 300 mm | 450 mm | 600 mm | 750 mm | 900 mm | 1050 mm | 1200 mm |
|---|---|---|---|---|---|---|---|
| Linear (kg/m) | 12628 | 9946 | 8233 | 7040 | 6146 | 5439 | 5141 |
| Uniform (kg/m²) | 41358 | 26962 | 21716 | 18446 | 13420 | 10180 | 8418 |
5 . How to use these tables
- Choose the mesh by open area and weight: a larger mesh drains and ventilates better, a smaller mesh carries more load and stops small objects falling through.
- Choose the resin system by the chemical environment, not by price. See the oxygen index table above.
- Read the deflection table at your actual support span. A common working limit is L/100 for walkways and L/200 where a stiffer feel is required.
- Treat the limit load as a safety reference only. Design working loads well below it.
- Confirm the panel size against your opening before ordering; panels can be cut to size on request.