FRP / GRP
Cable TraysManufacturer · Supplier · Exporter
Complete range of FRP/GRP cable trays — ladder, perforated, solid bottom, channel, and wire mesh types — with matching covers, bends, tees, reducers, and support brackets. Isophthalic, vinyl ester, epoxy, and phenolic resin systems. IEC 61537, NEMA VE1, BS EN 61537, DIN EN 61537 standards. Serving chemical, oil & gas, marine, water treatment, and power generation sectors globally.
FRP/GRP Cable Tray — Full Range
All cable trays manufactured to IEC 61537 / NEMA VE1 dimensional and load standards. Fire performance tested per ASTM E84 / IEC 60332. Full material batch records, load test reports, and dimensional inspection certificates supplied with every order.
Two pultruded or hand lay-up side rails connected by transverse rungs at regular intervals — the most widely used FRP cable tray type. Superior ventilation for power cables, ease of cable access, and the highest load-to-weight ratio of all tray types. Preferred for medium and heavy power cable installations.
- Width Range100 · 150 · 200 · 300 · 450 · 600 · 900 · 1200 mm
- Side Rail Depth50 · 75 · 100 · 150 mm (load capacity increases with depth)
- Rung Spacing150 mm / 200 mm / 300 mm c/c (standard) · 450 mm on request
- Rung WidthMatches tray inside width · typically 25–38 mm rung cross-section
- Standard Length3000 mm (standard) · 3600 mm · 6000 mm
- Side Rail ProfileReturn flange (inward) · Flangeless (outward) · Ventilated rail
- Resin SystemsIsophthalic · Vinyl Ester · Epoxy · Orthophthalic · Phenolic (FR)
- ColourLight grey (RAL 7035) · Yellow · Green · Orange · Custom RAL
- Load ClassLight (A): 50 kg/m · Medium (B): 100 kg/m · Heavy (C): 150 kg/m · Extra Heavy (D): 200 kg/m
- Max. Span1500 mm (light) · 3000 mm (heavy duty) — verify per load class and span table
- Fire RatingASTM E84 Class I · IEC 60332-3 Cat. C (FR grade) · UL94 V-0
- Surface FinishUV-stabilised gel coat (standard) · Grit anti-slip top rail surface
- Cable FillMax. 50% fill (open tray — heat dissipation maintained) per NEC / IEE Wiring Regs
- EarthingNon-conductive — continuous earth conductor clipped to tray side rail required
Deep side rail (150 mm) ladder tray for maximum load capacity at long support spans. Required on offshore platforms where structural supports are widely spaced and cable loads are high. Epoxy or vinyl ester resin for offshore service.
- Side Rail Depth150 mm (deep rail)
- Width Range300 · 450 · 600 · 900 mm
- Load ClassClass D: 200 kg/m at 3000 mm span · Class 20C (NEMA): 900 kg/3m
- Rung Spacing300 mm c/c (standard)
- Resin SystemsVinyl Ester (standard offshore) · Epoxy (oil & gas)
- Max. Span3000 mm at design load (Class D)
- Fire RatingASTM E84 Class I · IMO A.653(18) (phenolic grade)
- HardwareSS 316 splice plates, support brackets, and hardware — all supplied
Ladder Cable Tray — Load Capacity vs. Span (IEC 61537 Load Classes)
Safe working load (SWL) for uniformly distributed load (UDL) at defined support span. Deflection limit = span/100 per IEC 61537. Vinyl ester resin. Safety factor ≥ 1.7 on ultimate failure load. Concentrated (point) loads require separate calculation.
| Rail Depth | Width | Span 1000mm | Span 1500mm | Span 2000mm | Span 3000mm | IEC Class | NEMA Class | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|
| 50 mm | 100–300 mm | 70 kg/m | 40 kg/m | 25 kg/m | — | A (≥50) | 8A | 3.0–5.5 |
| 75 mm | 100–600 mm | 130 kg/m | 75 kg/m | 50 kg/m | 22 kg/m | B (≥100) | 12A | 4.5–9.0 |
| 100 mm | 200–900 mm | 200 kg/m | 115 kg/m | 75 kg/m | 33 kg/m | C (≥150) | 16A | 6.5–14.0 |
| 150 mm | 300–900 mm | 360 kg/m | 210 kg/m | 140 kg/m | 62 kg/m | D (≥200) | 20C | 9.0–20.0 |
Values indicative — actual capacity varies with width and resin. Isophthalic resin SWL is approximately 5% lower. For exact values, refer to load span table in product datasheet. IEC 61537 load class is defined at span/100 deflection limit, not ultimate failure. Never load cable trays beyond the published SWL at the installed support spacing.
Continuous tray base with punched perforations (typically 20–40% open area). Provides a continuous cable support surface while maintaining partial ventilation. Prevents small cables and cable cleats from snagging on rung gaps. Preferred for instrumentation, control, and small-diameter cable runs.
- Perforation PatternRound hole (⌀ 8 / 10 / 12 mm) · Slot · Diamond · Custom pattern
- Open Area20% / 30% / 40% (perforation density options)
- Width Range100 · 150 · 200 · 300 · 450 · 600 mm
- Side Rail Depth50 · 75 · 100 mm
- Standard Length3000 mm (standard) · 3600 mm
- Load ClassA (50 kg/m) · B (100 kg/m) at standard spans
- Resin SystemsISO · VE · Epoxy · Phenolic (FR)
- ColourGrey (RAL 7035) · Yellow · Green · Custom
- Cable FillMax. 50% fill; perforations maintain thermal derating factor
- Best ForInstrumentation · Control cables · Fibre optic · Small diameter power cables · Clean environments
- Fire RatingASTM E84 Class I (FR grade) · IEC 60332-3
Perforated vs Ladder Tray — When to Use Which
| Factor | Ladder Tray | Perforated Tray | Guidance |
|---|---|---|---|
| Cable Type | Power cables (large dia.) · MV/HV cables | Instrumentation · Control · Fibre optic · Small power | Perforated preferred for cables <25 mm OD |
| Ventilation | Excellent — open rungs, max airflow | Moderate — partial via perforations | Ladder gives better cable ampacity (lower derating) |
| Cable Support | Rung-point support — cables may sag between rungs | Continuous support — no inter-rung sag | Perforated better for soft/fragile cables |
| Load Capacity | Higher — deep rail, no base plate | Lower — base plate adds weight, reduces stiffness | Ladder preferred for heavy cable loads |
| Span Capability | Up to 3000 mm (deep rail) | Up to 1500–2000 mm typically | Ladder for wide support spacing |
| Drainage | Excellent — open rungs drain freely | Good — holes drain, but can collect debris | Ladder preferred in wet/outdoor environments |
| Cost | Lower (less material — open design) | Higher (solid base + perforating process) | Ladder 10–20% lower cost typically |
| Aesthetics / Cleanliness | Open appearance — cables visible | Neater — cables partially obscured by base | Perforated preferred in control rooms, clean rooms |
Fully enclosed base (no perforations) with solid side rails and optional solid cover. Provides maximum mechanical protection to cables and prevents ingress of drips, dust, and chemical splash from above. Used in chemical plants where corrosive liquids may drip onto cable routes.
- Width Range100 · 150 · 200 · 300 · 450 · 600 mm
- Side Rail Depth50 · 75 · 100 mm
- Standard Length3000 mm
- Open Area0% (solid base — no drainage)
- Drainage HolesOptional drainage slots at base — field-drilled or factory as specified
- Cable FillMax. 40% fill (solid tray — reduced ventilation vs. ladder/perforated)
- Load ClassA / B per IEC 61537 at standard spans
- Resin SystemsISO · VE · Epoxy · Phenolic
- Cover OptionSnap-on cover · Hinged cover · Solid or ventilated cover — see Covers & Fittings tab
- Best ForChemical splash zones · Corrosive drip areas · Outdoor with UV/rain protection needed · Clean rooms
Shallow single-channel or U-section tray for small cable bundles, instrument tubing bundles, and single power feeders. Economical and lightweight. Often used for branch cable runs off main ladder tray routes. Available solid and perforated.
- TypesU-channel (single rail) · Mini tray (25×25 mm) · Cable basket (shallow open)
- Width Range50 · 75 · 100 · 150 · 200 mm
- Side Height25 · 38 · 50 mm
- Standard Length3000 mm
- LoadLight duty — typically ≤25 kg/m UDL
- Resin SystemsISO · VE
- Best ForInstrument tubing bundles · Small control cable branches · Conduit support · Pipe supports in trench
Welded or pultruded GRP wire mesh basket tray — flexible, low-profile, and easy to cut and bend on-site. Ideal for data centres, building services, and instrumentation in corrosive environments where conventional metallic mesh trays corrode. GRP wire mesh is non-conductive and non-magnetic.
- Wire Diameter4 mm / 5 mm / 6 mm GRP rod (filament wound)
- Mesh Opening50×50 mm · 100×50 mm
- Width Range50 · 100 · 150 · 200 · 300 · 450 · 600 mm
- Height50 · 75 · 100 mm
- Standard Length3000 mm
- FlexibilityField-formable for bends and level changes without special fittings (narrow widths)
- Resin SystemsISO · VE
- Best ForData centres in chemical environments · Instrumentation · Building services · Internal cable management
Matching GRP covers for ladder, perforated, and solid bottom trays — protect cables from mechanical damage, UV exposure, chemical drips, and bird/rodent damage. Available ventilated and solid. Same resin system as the tray — full chemical resistance maintained.
- Cover TypesSolid flat cover · Ventilated (louvred) cover · Peaked (rainwater shedding) · Snap-on (tool-free removal) · Hinged
- WidthMatched to tray width — 100 to 1200 mm
- Standard Length3000 mm (matches tray length — no mis-stagger)
- FixingSnap-on clips (standard) · SS 316 screws · Cover retaining clips (anti-theft)
- VentilationSolid cover: 0% open — maximum protection · Louvred: ~15% open — maintains cable derating
- Resin SystemsMatched to tray — ISO / VE / Epoxy / Phenolic
- ColourMatched to tray colour — RAL 7035 standard
- UV RatingUV-stabilised gel coat — 30-year outdoor rated
- ATEX AreasSolid covers required in ATEX Zone 1/2 areas to prevent sparks entering tray (project-specific)
Complete range of FRP fittings to form a continuous cable tray system — all matched in resin system, depth, and colour to the straight tray. Fittings are prefabricated — no site fabrication cutting required (which degrades resin surface). Splice plates and hardware in SS 316.
- Horizontal Bends30° / 45° / 60° / 90° inside and outside bends · LR (1.5D) and SR (1D) radius
- Vertical Bends30° / 45° / 60° / 90° horizontal-to-vertical (riser)
- TeesEqual tee · Reducing tee · Cross piece (4-way) · Lateral 45°
- ReducersConcentric reducer · Offset reducer (same depth, different width)
- End CapsFlat end cap — closes tray end for protection and aesthetics
- Splice PlatesGRP or SS 316 splice plate — joins straight tray sections. NEMA VE1 / IEC 61537 splice bolt pattern.
- Support BracketsPultruded GRP trapeze bracket · Wall bracket · Post & arm · Cantilever · Channel bracket
- DividersVertical divider strip — separates power from instrumentation cables within same tray
- HardwareAll bolts, nuts, washers in SS 316 as standard (never galvanised steel in chemical environments)
FRP Cable Tray Fittings — Availability Matrix
| Fitting | Ladder Tray | Perforated | Solid Bottom | Channel | Angles Available | Width Range |
|---|---|---|---|---|---|---|
| Horizontal bend (inside) | ✓ | ✓ | ✓ | ✓ | 30/45/60/90° | 100–1200 mm |
| Horizontal bend (outside) | ✓ | ✓ | ✓ | ✓ | 30/45/60/90° | 100–1200 mm |
| Vertical bend (riser) | ✓ | ✓ | ✓ | ✓ | 45/90° | 100–900 mm |
| Equal tee | ✓ | ✓ | ✓ | ✓ | — | 100–1200 mm |
| Reducing tee | ✓ | ✓ | ✓ | On req. | — | 150–900 mm |
| Cross piece (4-way) | ✓ | ✓ | ✓ | On req. | — | 200–600 mm |
| Reducer (width) | ✓ | ✓ | ✓ | ✓ | — | All standard pairs |
| Splice plate (GRP) | ✓ | ✓ | ✓ | ✓ | — | 100–1200 mm |
| Solid cover | ✓ | ✓ | ✓ | ✓ | — | 100–1200 mm |
| Ventilated (louvred) cover | ✓ | ✓ | — | — | — | 100–900 mm |
| GRP divider strip | ✓ | ✓ | ✓ | — | — | For trays ≥200 mm |
| Wall bracket (GRP) | ✓ | ✓ | ✓ | ✓ | — | All widths |
Standard Dimensions & Size Guide
FRP/GRP cable trays are manufactured to match IEC 61537 and NEMA VE1 dimensional standards for compatibility with all standard cable tray accessories and support systems. Custom widths, depths, and lengths available on request with minimum order quantities.
| Tray Width | Typical Cable Fill (mm²) | Side Rail Depth Options | Standard Lengths | IEC 61537 Ref. Width | NEMA VE1 Width | Approx. Weight (kg/m) Ladder 75mm |
|---|---|---|---|---|---|---|
| 100 mm | Up to 600 mm² total | 50 / 75 mm | 3000 mm | 100 mm | 4 inch | 2.8 |
| 150 mm | Up to 1000 mm² | 50 / 75 mm | 3000 mm | 150 mm | 6 inch | 3.5 |
| 200 mm | Up to 1500 mm² | 50 / 75 / 100 mm | 3000 mm | 200 mm | 8 inch | 4.5 |
| 300 mm | Up to 2500 mm² | 75 / 100 / 150 mm | 3000 / 6000 mm | 300 mm | 12 inch | 6.0 |
| 450 mm | Up to 4000 mm² | 75 / 100 / 150 mm | 3000 / 6000 mm | 450 mm | 18 inch | 8.5 |
| 600 mm | Up to 6000 mm² | 100 / 150 mm | 3000 / 6000 mm | 600 mm | 24 inch | 11.0 |
| 750 mm | Up to 8000 mm² | 100 / 150 mm | 3000 mm | 750 mm | 30 inch | 14.0 |
| 900 mm | Up to 10000 mm² | 100 / 150 mm | 3000 mm | 900 mm | 36 inch | 17.0 |
| 1200 mm | Up to 14000 mm² | 150 mm | 3000 mm | 1200 mm | 48 inch | 22.5 |
Cable fill figures are approximate for mixed instrumentation and power cable mix. Actual fill calculations must follow IEC 61537 / NEC Art.392 fill rules. Maximum 50% fill recommended for open (ladder/perforated) trays to maintain cable ampacity derating per IEE Wiring Regulations / NEC. Weights shown for vinyl ester ladder tray, 75mm deep, 300mm rung spacing. Solid bottom and perforated trays are 15–25% heavier at same width.
Resin Selection
Resin system determines chemical resistance, temperature limit, fire performance, and ATEX zone suitability. Always specify resin based on the most aggressive chemical in the cable tray environment — including drips, fumes, and cleaning agents.
IEC 60332 Cable Tray Fire Test Reference
IEC 60332-3 tests a bundle of cables installed on the tray — not just the tray material itself. The tray resin must not accelerate the cable fire. Category C is the minimum required for most industrial installations; Category A is mandatory for marine/offshore per SOLAS.
| Standard | Test Type | Flame Exposure | Acceptance Criterion | Resin Grades that Pass | Applicable Market |
|---|---|---|---|---|---|
| IEC 60332-1 | Single cable — vertical flame | Single 1 kW flame, 60 sec | Char length ≤540 mm | All FR grades | General — minimum requirement |
| IEC 60332-3 Cat.D | Bundle — vertical propagation | 20.5 kW flame, 20 min | Char length ≤2.5 m | ISO FR · VE FR · Epoxy | Light cable installations |
| IEC 60332-3 Cat.C | Bundle — vertical propagation | 20.5 kW flame, 20 min | Char length ≤2.5 m | VE FR · Epoxy · Phenolic | Industrial — most common standard |
| IEC 60332-3 Cat.A | Bundle — most severe vertical | 70 kW flame, 40 min | Char length ≤2.5 m | Phenolic resin only | Marine / offshore (SOLAS) |
| ASTM E84 | Steiner tunnel test | Tunnel flame spread | Class I: FSI ≤25, SDI ≤450 | ISO FR · VE FR · Epoxy · Phenolic | USA / North America |
| IMO A.653(18) | Radiant panel + smoke | Radiant panel, 10 min | Flame spread + smoke density per BSS 7239 | Phenolic resin mandatory | Marine vessels / offshore accommodation |
Key Features
FRP/GRP cable trays deliver permanent performance advantages that steel, aluminium, and GI trays cannot match in corrosive, electrically sensitive, or weight-critical installations.
Applications — Key Sectors
FRP/GRP cable trays eliminate the corrosion inspection, repainting, and replacement cycle that consumes maintenance budgets on steel and GI trays in aggressive industrial environments.
FRP/GRP Cable Tray vs. Alternatives
FRP cable tray has a higher initial cost than hot-dip galvanised steel but delivers superior whole-life cost in corrosive environments where metallic trays require repainting, re-galvanising, or replacement every 5–10 years.
| Property | FRP/GRP (VE resin) | HDG Steel | Painted Steel | Aluminium Alloy | Stainless SS 316 |
|---|---|---|---|---|---|
| Weight 300mm×75mm (kg/m) | ~6 | ~22 | ~22 | ~8 | ~22 |
| Corrosion — Acid fumes | Excellent | Poor (zinc attacked) | Poor | Moderate | Good |
| Corrosion — H₂S atmosphere | Excellent | Poor (6–12 months) | Poor | Moderate | Good |
| Corrosion — Marine/salt spray | Excellent | Poor (3–5 yr) | Very poor | Moderate (white corr.) | Good |
| Electrical Conductivity | Non-conductive | Conductive | Conductive | Conductive | Conductive |
| Non-Magnetic | Non-magnetic | Magnetic | Magnetic | Non-magnetic | Non-magnetic |
| HV Single-Core Cable | No induced heating | Eddy current heating | Eddy current heating | Eddy current heating | Low (non-magnetic) |
| Fire Performance | Class I / IEC 60332-3C (FR) | Non-combustible | Non-combustible | Non-combustible | Non-combustible |
| On-Site Cutting | Angle grinder — no hot work | Cutting disc — hot work | Cutting disc — hot work | Angle grinder | Cutting disc — hot work |
| Maintenance (10yr, chemical) | None required | Repaint zinc 2–3yr | Repaint every 1–2yr | Inspect annually | Inspect + passivate |
| Design Life (chemical plant) | 30–50 years | 5–15 years | 2–5 years | 10–20 years | 20–35 years |
| Cathodic Protection | Not required | Required offshore | Required offshore | Not required | Not required |
| Initial Material Cost | Medium–High | Low | Lowest | Medium | High |
| Whole-Life Cost (20yr, corr.) | Lowest | Medium | Highest | Medium | Medium–Low |
Export Standards
All FRP/GRP cable trays supplied with raw material batch records, load test certificates (per IEC 61537 / NEMA VE1), fire test certificates (ASTM E84 / IEC 60332-3), and dimensional inspection reports. Third-party certification available.
Export Market — Preferred Standards
| Export Region | Tray Standard | Fire Standard | Certification |
|---|---|---|---|
| USA / Canada | NEMA VE1 · NEC Art.392 | ASTM E84 Class I · UL 568 | UL Listed · cUL |
| Europe (EU/EEA) | IEC 61537 / BS EN 61537 | IEC 60332-3 Cat.C · EN 13501-1 | CE Mark · EN 10204 3.1 |
| Middle East (Oil & Gas) | IEC 61537 · NEMA VE1 (project dep.) | ASTM E84 Class I · IEC 60332-3C | IECEx · Aramco/ADNOC project spec |
| Africa | BS EN 61537 / IEC 61537 | IEC 60332-3 Cat.C · ASTM E84 | SABS (SA) · EN 10204 3.1 |
| Marine / Offshore | IEC 61537 · NORSOK / project spec | IMO A.653(18) · IEC 60332-3A · BSS 7239 | DNV · Lloyd's · BV · ABS class cert |
Request a Quote
Tell us tray type, resin, width, depth, length, and export standard — we'll respond within 24 hours with pricing, datasheet, and lead time.
- Raw material batch records and resin content certificates with every order
- IEC 61537 / NEMA VE1 load test reports — class and span verified
- ASTM E84 / IEC 60332-3 fire test certificates (FR grades)
- Third-party inspection — DNV, Lloyd's, BV, SGS, TÜV on request
- IMO A.653(18) certification for phenolic marine/offshore grade
- CE marking for European export (CPR / Low Voltage Directive)
- Complete system supply — trays + fittings + covers + brackets + hardware
- Custom widths, depths, and cut lengths — min. order quantities apply
- Export packing — fumigated crates, bundle packing, sea freight ready
