Index
Fiberglass Grating Technical Resources
Updated
Use these fiberglass grating resources in three steps: choose molded or pultruded, check the load table at your clear span and design load, then confirm weight, open area and fire rating. Strongrate data comes from its documents: ASTM E84-19a results for six DNV-listed models (flame spread 5 to 20), and its 2023 catalog values, confirmed in your quote and submittal drawings before design use.
Which fiberglass grating resource answers your question?
| Your question | Resource | What you will find |
|---|---|---|
| How much load will it carry at my span? | Fiberglass grating load tables | Strongrate catalog deflection tables by span, molded and pultruded1 |
| What does a panel weigh, and how much of it is open? | Sizes, weight and open area | Catalog weight, open area and panel sizes for every listed mesh and pultruded type2 |
| What should the project specification say? | Fiberglass grating specifications | Guide specification under CSI 06 74 13, with the catalog’s resins, surfaces and chemical-resistance chart3,4 |
| Is it Class 1 fire rated under ASTM E84? | ASTM E84 Class 1 fire rating | Flame spread index 5–20 for six DNV-listed models5 |
| How do I cut it and seal the edges? | How to cut fiberglass grating | Tools, blades, dust control and edge sealing, step by step |
| How do I fasten and support it? | How to install fiberglass grating | Support bearing, clip spacing and fastening, step by step |
| Molded or pultruded? | Molded vs pultruded fiberglass grating | Industry comparison, plus the catalog’s glass content: 30–35% molded, 60–65% pultruded |
| Fiberglass or steel? | Fiberglass vs steel grating | Industry comparison of weight, cost and service life |
| Something else? | Fiberglass grating FAQ | Short answers that link to the page covering each topic |
Values from Strongrate’s 2023 catalog; confirmed in your quote and submittal drawings before design use.
Notes
- 1Catalog tables; confirm the values for your span in the submittal before final design.
- 2Values as printed in the factory catalog (2023).
- 3Maximum service temperatures as printed in the catalog’s resin table; its chemical-resistance chart prints lower maximums.
- 4General information from resin makers’ data, as printed in the catalog; testing in the actual environment is recommended.
- 5Applies only to the six models listed on DNV certificate TAF0000191 Rev. 1.
Technical data
- Span, load, deflectionFiberglass grating load tablesHow to read fiberglass grating load tables by span, safety factor and deflection limit, with the deflection tables from Strongrate’s catalog.
- Panels and depthsFiberglass grating sizes, weight & open areaFiberglass grating panel sizes, depths and mesh patterns, with weight per square foot and open area.
- CSI 06 74 13Fiberglass grating specificationsA three-part guide specification for fiberglass grating, with editable origin and warranty clauses.
- Flame spread and smokeASTM E84 fire rating for fiberglass gratingWhat ASTM E84 Class 1 means for FRP grating and the flame spread and smoke results of the six DNV-listed Strongrate models.
Guides and comparisons
- GuideHow to cut fiberglass gratingHow to cut fiberglass grating: blades and tools, cutting steps, sealing cut edges and protective equipment.
- GuideHow to install fiberglass gratingHow to install fiberglass grating: bearing on supports, span direction, hold-down clips and expansion gaps.
- ComparisonMolded vs pultruded gratingHow molded and pultruded fiberglass grating differ in manufacture, strength direction, span and cost.
- ComparisonFiberglass vs steel gratingFiberglass and steel grating compared on weight, corrosion, cost over time and installation, including when steel is the better choice.
- Quick answersFiberglass grating FAQShort answers to common buyer and engineer questions, each linking to the page that covers it.
Buying and import resources
Strongrate grating is made in Nantong, China, and ships from China, so cost, timing and eligibility questions have their own pages.
- PricingFiberglass grating price per sq ftHow fiberglass grating is priced per square foot and per panel, with dated US market benchmarks.
- ImportFRP grating landed cost & import dutyHTS 3925.90, the current duty stack on China-made FRP grating, ocean freight and a landed-cost example.
- ShippingFiberglass grating lead times & MOQProduction and ocean transit times from China, minimum orders and container shipping.
- EligibilityBuy America (BABA) and fiberglass gratingWhich projects Build America, Buy America covers, and why China-made grating does not qualify for them.
- CommercialFiberglass grating terms & warrantyPayment terms, warranty, returns and the industry benchmarks they are measured against.
- SuppliersUS fiberglass grating suppliersFactory-direct versus US stocking importers, and which fits your quantity and deadline.
Which standards apply to fiberglass grating?
These are the standards and specification conventions the resource pages cite, summarized from the sources listed below. Check the current text and the edition your project or jurisdiction adopts.
| Standard | What it covers | Requirement or result on record | Where we use it |
|---|---|---|---|
| ASTM E84 | Surface burning: flame spread index (FSI) and smoke-developed index (SDI) | US guide specifications require FSI of 25 or less (Class 1 / Class A)1 | ASTM E84 fire rating |
| ASTM D635 | Burning rate of plastics | Guide specs require self-extinguishing grating, or no burning past the 1" (25 mm) mark | Fiberglass grating specifications |
| ASTM F3059 | Fire integrity of FRP grating on vessels and offshore installations | Six DNV-listed Strongrate models: structural fire integrity L0 (ASTM F3059-15)2 | Fiberglass grating certifications |
| OSHA 29 CFR 1910.22(b) | Walking-working surfaces | Each surface must support its maximum intended load | Fiberglass grating load tables |
| OSHA 29 CFR 1910.25 | Stairways | Stairs carry at least 5× the normal live load, never less than 1,000 lb (4.4 kN) concentrated | Fiberglass stair treads |
| 2010 ADA Standards §302.3 | Openings in floor and ground surfaces | Openings must not pass a 1/2" (13 mm) sphere | Mini-mesh ADA grating |
| CSI MasterFormat 06 74 13 | Specification section for fiberglass grating | Section 06 74 13 (older specifications use 06610) | Fiberglass grating specifications |
| ANSI/ACMA FGMC Grating Manual | Load-table, tolerance and testing conventions | 2nd edition, 2019 | Fiberglass grating load tables |
| CSA S806:26 (Canada) | Building structures with fiber-reinforced polymers | 3rd edition, 2026; cite for Canadian projects | Fiberglass grating specifications |
Summaries, not the standards’ text. Strongrate results on record exist for two of these standards, ASTM E84-19a and ASTM F3059-15, both from DNV Type Approval TAF0000191 Rev. 1 and for six models only.
Notes
- 1A specification threshold, not a test result.
- 2As stated on the certificate; acceptance for a given location is case by case.
Request a quote
Send your product, quantity, ZIP code and need-by date. Quotes within 1 business day (US Central time) confirm routing and next steps.
Sources
- DNV Type Approval Certificate TAF0000191 Rev. 1 (ASTM E84-19a results and ASTM F3059-15 rating) (accessed Oct 15, 2026)
- Strongrate product catalog “Your Best FRP Solution” (image PDF, Sep 2023), supplied by the site owner (accessed Oct 17, 2026)
- Fibergrate molded grating guide specification (Section 06610) (accessed Oct 15, 2026)
- Strongwell Section 06 74 13, FRP Molded Grating and Stair Treads specification (accessed Oct 15, 2026)
- OSHA 29 CFR 1910.22, Walking-working surfaces (accessed Oct 15, 2026)
- OSHA 29 CFR 1910.25, Stairways (accessed Oct 15, 2026)
- U.S. Access Board, Guide to the ADA Standards, Chapter 3: Floor and Ground Surfaces (accessed Oct 15, 2026)
- ACMA, 2nd edition national standard fiberglass grating manual (accessed Oct 15, 2026)
- CSA Group store, CSA S806:26 (accessed Oct 15, 2026)