Product specification

2" T-Bar Pultruded Fiberglass Grating

Updated Oct 17, 2026

Strongrate's catalog lists two 2" (50 mm) T-bar pultruded grating types: T-3320, 33% open at 4.2 lb/ft² (20.3 kg/m²), and T-5020, 50% open at 3.2 lb/ft² (15.7 kg/m²). T-5020 is DNV-listed model T5020, which in vinyl ester has an ASTM E84-19a flame spread index of 20 and smoke-developed index of 300.

Specifications: 2" (50 mm) T-bar pultruded grating

Profile: Pultruded T-bars joined by cross bars bonded with epoxy
Bar depth: 2" (50 mm)Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Catalog types: T-3320, T-5020Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Open area: 33% and 50%Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Weight: 3.2–4.2 lb/ft² (15.7–20.3 kg/m²)Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Cross-bar centers: 6" (152 mm)Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Glass content: 60–65%
Resins: Fire-retardant vinyl ester (VEFR), isophthalic polyester (IFR) or food-grade isophthalic (FG)Maximum service temperatures as printed in the catalog’s resin table; its chemical-resistance chart prints lower maximums.
Surfaces: Corrugated (slotted), gritted or smooth top; solid cover with checker or grit finish
Maximum panel size: 5 ft × 20 ft (1524 × 6100 mm)Values as printed in the factory catalog (2023); confirmed in your quote and submittal drawings.
Standard panel sizes: On request
Bar dimensions and clear opening: On request
Colors: On request
Tolerances: On request

2" T-bar pultruded grating: T-shaped bearing bars with wide top flanges, joined by a cross bar, in sectionSchematic — not to scale

Which 2" T-bar types does Strongrate list?

On a T-bar, the wide top flanges form the walking surface and the openings are the gaps between them, so T-3320, with closer bars, has the smaller openings and the higher weight. T-5020 is the type DNV lists as T5020. Panels run up to 5 ft × 20 ft (1524 × 6100 mm), with the bearing bars along the panel length.

Strongrate 2" (50 mm) T-bar pultruded grating types: catalog data

Type	Bar shape	Depth	Bearing-bar centers	Cross-bar centers	Open area	Weight
T-3320¹	T-bar	2" (50 mm)¹	1.50" (38.1 mm)¹	6" (152 mm)¹	33%¹	4.2 lb/ft² (20.3 kg/m²)¹
T-5020¹	T-bar	2" (50 mm)¹	2.00" (50.8 mm)¹	6" (152 mm)¹	50%¹	3.2 lb/ft² (15.7 kg/m²)¹

As printed in Strongrate’s 2023 product catalog; confirmed in your quote and submittal drawings. Weights and open areas are from the catalog’s summary table; some of its detail cards print different values.

Notes

1Values as printed in the factory catalog (2023).

How much load can 2 inch T-bar fiberglass grating carry?

Find your clear span, then read deflection under your design load. Typical pedestrian loads are 50–65 psf (2.4–3.1 kPa), and common deflection limits are 3/8" (9.5 mm) or L/120 for comfort and 1/4" (6.4 mm) or L/200 for a firmer feel. Halve tabulated loads for impact or dynamic conditions.

Concentrated line load deflection, Strongrate 2" (50 mm) T-bar types (catalog pages 73–74)

Clear span	Type	202 lb/ft (300 kg/m)	302 lb/ft (450 kg/m)	504 lb/ft (750 kg/m)	1,008 lb/ft (1,500 kg/m)	2,016 lb/ft (3,000 kg/m)	3,998 lb/ft (5,950 kg/m)	Max load, lb/ft (kg/m)
23-5/8" (600 mm)	T-3320	—	0.01" (0.25 mm)	0.02" (0.51 mm)	0.04" (1.02 mm)	0.07" (1.78 mm)	0.13" (3.3 mm)	11,340 (16,876)
35-7/16" (900 mm)	T-3320	0.02" (0.51 mm)	0.03" (0.76 mm)	0.05" (1.27 mm)	0.09" (2.29 mm)	0.18" (4.57 mm)	0.37" (9.4 mm)	5,034 (7,492)
47-1/4" (1200 mm)	T-3320	0.04" (1.02 mm)	0.06" (1.52 mm)	0.09" (2.29 mm)	0.15" (3.83 mm)	0.39" (9.91 mm)	—	2,832 (4,215)
59-1/16" (1500 mm)	T-3320	0.07" (1.78 mm)	0.11" (2.79 mm)	0.18" (4.57 mm)	0.36" (9.14 mm)	—	—	1,812 (2,696)
23-5/8" (600 mm)	T-5020	0.01" (0.25 mm)	0.02" (0.51 mm)	0.03" (0.76 mm)	0.05" (1.27 mm)	0.09" (2.29 mm)	0.18" (4.57 mm)	8,505 (12,657)
35-7/16" (900 mm)	T-5020	0.03" (0.76 mm)	0.05" (1.27 mm)	0.07" (1.78 mm)	0.13" (3.3 mm)	0.24" (6.1 mm)	—	3,776 (5,619)
47-1/4" (1200 mm)	T-5020	0.06" (1.52 mm)	0.09" (2.29 mm)	0.14" (3.56 mm)	0.26" (6.6 mm)	—	—	2,124 (3,161)
59-1/16" (1500 mm)	T-5020	0.10" (2.54 mm)	0.15" (3.81 mm)	0.25" (6.35 mm)	0.49" (12.45 mm)	—	—	1,359 (2,022)

Cells are deflection under static load at ambient temperature, as printed in Strongrate’s 2023 catalog (mm), with inches converted; “—” means no value is printed. Halve the loads for impact or dynamic conditions. Confirm the values for your span in the submittal before final design.

Notes

Deflections as printed in the factory catalog (2023), static loads at ambient temperature.
Catalog tables.

Uniform load deflection, Strongrate 2" (50 mm) T-bar types (catalog pages 74–75)

Clear span	Type	92 psf (450 kg/m²)	195 psf (950 kg/m²)	297 psf (1,450 kg/m²)	492 psf (2,400 kg/m²)	993 psf (4,850 kg/m²)	1,946 psf (9,500 kg/m²)	Max load, psf (kg/m²)
23-5/8" (600 mm)	T-3320	0.01" (0.25 mm)	0.02" (0.51 mm)	0.03" (0.76 mm)	0.06" (1.52 mm)	0.08" (2.03 mm)	0.16" (4.06 mm)	11,340 (55,368)
35-7/16" (900 mm)	T-3320	0.03" (0.76 mm)	0.06" (1.52 mm)	0.12" (3.05 mm)	0.22" (5.59 mm)	0.29" (7.37 mm)	0.59" (14.99 mm)	7,557 (36,895)
47-1/4" (1200 mm)	T-3320	0.09" (2.29 mm)	0.18" (4.57 mm)	0.37" (9.4 mm)	—	—	—	5,665 (27,659)
59-1/16" (1500 mm)	T-3320	0.20" (5.08 mm)	0.39" (9.91 mm)	—	—	—	—	4,534 (22,137)
23-5/8" (600 mm)	T-5020	0.02" (0.51 mm)	0.03" (0.76 mm)	0.05" (1.27 mm)	0.09" (2.29 mm)	0.12" (3.05 mm)	0.25" (6.35 mm)	8,505 (41,526)
35-7/16" (900 mm)	T-5020	0.04" (1.02 mm)	0.08" (2.03 mm)	0.15" (3.81 mm)	0.27" (6.86 mm)	0.37" (9.4 mm)	—	5,667 (27,671)
47-1/4" (1200 mm)	T-5020	0.13" (3.3 mm)	0.25" (6.35 mm)	0.49" (12.45 mm)	—	—	—	4,249 (20,744)
59-1/16" (1500 mm)	T-5020	0.27" (6.86 mm)	0.53" (13.46 mm)	—	—	—	—	3,400 (16,602)

Notes

Deflections as printed in the factory catalog (2023), static loads at ambient temperature.
Catalog tables.

If a shallower panel works, 1" I-bar grating or 1-1/2" I-bar grating saves depth and weight; also compare 2" molded grating at the same span. How to read the columns: fiberglass grating load tables.

Strongrate's catalog presents its T-bar types as a pedestrian series with no vehicle rating, so do not use 2" T-bar where wheels or forklifts cross. For vehicle areas see trench covers and drain grates.

What does the DNV certificate say about T-bar model T5020?

DNV-listed pultruded T-bar model T5020: what the certificate states

Item	Model T5020
Certificate	DNV Type Approval TAF0000191 Rev. 1¹
Valid until	Feb 10, 2027
Resin	Vinyl ester²
ASTM E84-19a flame spread index (FSI)	20³
ASTM E84-19a smoke-developed index (SDI)	300³
Structural fire integrity	L0 per ASTM F3059-15⁴

As listed on the certificate, which covers fire performance only, not load capacity.

Notes

1The approval covers fire-technical properties of the six listed models only, not structural strength, and acceptance is case by case.
2Bar depth and open area are not stated on the certificate.
3Result as listed on DNV certificate TAF0000191 Rev. 1 (ASTM E84-19a); applies to this model only.
4As stated on the certificate; acceptance for a given location is case by case.

FSI 20 is within the 25 that US specifications call Class 1 or Class A, and SDI 300 is within the 450 building-code limit. The results apply to T5020 in vinyl ester. More on ASTM E84 Class 1 fire rating.

Which resins and surfaces are offered at 2"?

Fire-retardant vinyl ester (VEFR, up to 230°F (110°C)), isophthalic polyester (IFR, up to 176°F (80°C)) or food-grade isophthalic polyester (FG); the DNV-listed T5020 is vinyl ester. Tops are corrugated, gritted or smooth, with solid covers in checker or grit finish. Chemical resistance by resin is on pultruded fiberglass grating.

How do you order 2" T-bar grating?

Made in Nantong, China, and shipped from China. Full containers and project quantities are quoted factory-direct; orders under about 500 sq ft, or needed in under 3 weeks, are referred to US stock. See the fiberglass grating price per square foot basis or request a quote.

Frequently asked questions

Is Strongrate model T5020 a 2" deep T-bar?

Yes, according to Strongrate's catalog, which lists T-5020 at 2" (50 mm) deep and 50% open. The DNV certificate itself states neither depth nor open area.

When should I choose 2" T-bar over 1-1/2" I-bar grating?

When the 1-1/2" I-bar load table misses your design load or deflection limit at your clear span, or when you want a lower open area, such as the 33% of T-3320. Compare both catalog tables at the same span.

Is vinyl ester T-bar grating suited to chemical plants?

Strongrate’s catalog rates the corrosion resistance of its vinyl ester system excellent, its highest rating. Its chemical-resistance chart rates 76 chemical environments by resin; check your chemical, concentration and temperature there, and test in the actual environment.

Pultruded fiberglass grating
Strongrate pultruded fiberglass (FRP) grating: the 36 I-bar and T-bar types in the factory catalog with depth, open area and weight, the two DNV-listed models and their ASTM E84 results, resins, surfaces and how to order.
1-1/2" pultruded I-bar grating
The three 1-1/2-inch I-bar pultruded grating types in Strongrate’s catalog (I-4015, I-5015, I-6015) with open area, weight and catalog deflection tables, plus the ASTM E84 results of DNV-listed I 6015.
1" pultruded I-bar grating
The three 1-inch I-bar pultruded grating types in Strongrate’s catalog (I-4010, I-5010, I-6010) with open area, weight, catalog deflection tables, resins and surfaces.
Fiberglass grating load tables
The load tables in Strongrate’s catalog for each product, and how to read fiberglass grating load tables: uniform and line loads by span, deflection limits and safety factors.
Fiberglass grating clips
Hold-down clips for molded and pultruded fiberglass grating: the STRONGFIX types in Strongrate’s catalog, common US clip types, the Type 316 stainless and 4 ft spacing rules in US guide specifications, and how to order clips with grating.
Fiberglass grating price per sq ft
Fiberglass grating prices per square foot and per panel: dated US market benchmarks, what moves the price, and how Strongrate quotes factory-direct prices per project.

Request a quote

Send the type (T-3320 or T-5020), clear span, design load, deflection limit, resin, panel size, quantity and ZIP code. Quotes within 1 business day (US Central time).

Request a quote Order a sample

Sources

Strongrate product catalog “Your Best FRP Solution” (image PDF, Sep 2023), supplied by the site owner (accessed Oct 17, 2026)
DNV Type Approval Certificate TAF0000191 Rev. 1, including ASTM E84-19a results (PDF hosted on Strongrate’s ShipServ supplier profile) (accessed Oct 15, 2026)
Fibergrate industrial pultruded load tables (PDF) (accessed Oct 15, 2026)
Fiberglass-AFI, Fire-retardant FRP and the FRP fire code (summary of the IBC) (accessed Oct 15, 2026)