Perforated Type Cable Tray Systems
Omkar Gratings designs and manufactures precision-punched perforated cable trays fabricated from prime mild steel, pre-galvanized sheet, and heavy gauge hot-dip galvanized steel conforming to ASTM A123 / BS EN ISO 1461. Engineered for control, telecom, and medium power cable routing, these trays offer continuous bottom support with ventilating slots designed to facilitate heat dissipation and drainage while protecting insulation jackets.
Support & Mounting Versatility: Engineered for center rod single-point hanging, heavy-duty C-hangers, two-trapeze support configurations, or direct cantilever wall bracket mounting.
Security & Weather Protection: Supplied with matching solid or louvered snap-on covers to protect cabling against outdoor exposure, mechanical debris, and chemical fallout.
- High corrosion resistance via in-house hot-dip galvanizing
- Smooth, deburred punched edges to eliminate insulation chafing
- Duty classes: Light Duty, Medium Duty, and Heavy Duty profiles
- Fully compatible with factory reducers, bends, tees, and risers
Ladder Type Cable Tray Systems
Constructed with two rigid longitudinal side rails welded or cold-swaged to transverse rungs, our ladder cable trays offer maximum mechanical strength-to-weight ratio and unobstructed natural airflow. Engineered primarily for high-voltage power distribution networks and large-diameter power cables where thermal buildup must be vented efficiently.
Engineering Specifications:
Width Options: 6, 12, 18, 24, 30, and 36 inches (150 mm to 900 mm nominal).
Side Rail Depths: 3, 4, 5, and 6 inches (75 mm to 150 mm) for high-density cable volumes.
Rung Spacing: 6, 9, 12, and 18 inches on center to match cable bending stiffness requirements.
Support Spans: Optimized for intermediate to long structural spans ranging from 12 ft to 30 ft (3.6 m to 9 m).
Channel Type & Cable Duct Tray
Channel cable trays provide an economical, continuous structural run designed for individual power cable drops, instrumentation branch feeds, and compact signal circuit routing where closed conduit is impractical. Cable tray ducts feature bottom transverse rungs spaced every 4 inches on center, ensuring moderate ventilation alongside dense support for multi-conductor cables.
Channel Profile Dimensions: Widths of 3, 4, and 6 inches in heavy gauge metal profiles; side flange depths from 1-1/4 to 1-3/4 inches.
Duct Dimensions: Widths of 6 to 36 inches, depths of 3 to 6 inches, designed for intermediate support spans of 5 to 12 feet.
Wire Mesh & Single Rail Cable Trays
Wire mesh (basket) trays feature round steel wire precision-welded into a grid mesh and electro-galvanized or hot-dip coated, providing high installation flexibility for low-voltage, data center, telecom, and fiber optic routing. Complementing this line, center-supported single rail systems allow maximum cable freedom for dropouts and multi-tier side entry, cutting installation labor costs considerably.
Stainless Steel Cable Tray Systems (AISI 304 / 316 / 316L)
Manufactured from certified austenitic stainless steel raw materials, our stainless cable trays are designed for corrosive, washdown, and hygienic industrial environments. After precision cutting and forming, all assemblies undergo chemical pickling, passivation, or optional electro-polishing to remove weld scale, rebuild the passive oxide layer, and deliver maximum pit corrosion protection.
Primary Applications: Offshore oil & gas platforms, marine coastal substations, food processing facilities, breweries, pharmaceutical clean rooms, and chemical processing skids.
- Superior resistance to atmospheric chlorides and acids
- High tensile yield strength under heavy cable load packaging
- Zero maintenance requirement over long plant life cycles
- Fabricated to project drawings with matching splice plates
FRP & GRP Composite Cable Trays
Engineered for aggressive industrial environments where metallic trays deteriorate, our Glass Reinforced Plastic (FRP/GRP) cable trays are manufactured through automated continuous pultrusion using premium isophthalic or vinyl ester resin systems reinforced with roving glass fibers. They are completely non-conductive, fire retardant (UL 94 V-0 / ASTM E84 Class 1), and immune to corrosive chemical vapor.
Key Advantages: Requires no grounding or bonding, provides high strength at one-third the weight of steel, easily cut on-site without hot work permits, and resists harsh UV exposure, salt spray, and bacterial growth.
Fittings, Couplers & Structural Accessories
We supply a complete package of factory-manufactured fittings engineered with smooth radius transitions to protect minimum cable bending radius requirements. Systems include horizontal elbows, vertical inside/outside risers, tees, cross pieces, reducers, splice connectors, hold-down clamps, barrier strips, and expansion plates.
Cable Tray Comparison & Technical Matrix
Compare mechanical characteristics, ventilation ratings, and typical industrial application environments.
| Tray Profile | Common Materials | Ventilation Rating | Support Span | Target Application Field |
|---|---|---|---|---|
| Ladder Cable Tray | HDG Steel, Aluminum, SS 316 | Maximum (Free Air) | 12 ft – 30 ft (Long) | Heavy power distribution, primary plant raceways |
| Perforated Cable Tray | Pre-Galvanized, HDG, Stainless Steel | Moderate | 6 ft – 12 ft (Medium) | Control cables, instrumentation, secondary feeds |
| Channel Cable Tray | Mild Steel, HDG, Stainless Steel | Limited / Solid | 5 ft – 10 ft (Short) | Single cable runs, equipment drop-offs |
| Wire Mesh (Basket) | Zinc Plated, AISI 304 / 316 | High | 4 ft – 8 ft (Short) | Data centers, telecommunication, fiber optic routing |
| FRP / GRP Composite | Pultruded Vinyl Ester / Isophthalic | High to Solid | 8 ft – 20 ft (Medium-Long) | Chemical plants, offshore skids, water treatment |
Industries Relying on Our Cable Containment
Power Generation
High-voltage cable ladder routing across thermal, hydro, and nuclear plants.
Oil & Gas Refineries
Corrosion-proof stainless steel and FRP cable trays for harsh hydrocarbon processing.
Chemical & Desalination
Acid and saline resistant GRP profiles eliminating structural oxidation.
Food & Pharmaceutical
Electro-polished AISI 304/316 trays meeting strict hygienic sanitary standards.
Marine & Shipyards
DNV-compliant marine grade containment for docks and shipboard wiring.
Substations & Utilities
Heavy duty galvanized raceways engineered to withstand short-circuit stresses.
Data Centers
Wire mesh basket systems for high-density copper and fiber cable networks.
Infrastructure & Transit
Perforated and single-rail containment for airports, metro lines, and commercial complexes.
Technical Questions from Project Engineers
When should Ladder Type Cable Trays be selected over Perforated Cable Trays?
Ladder type cable trays are specifically recommended for heavy-power distribution cabling requiring long support spans (ranging from 12 to 30 feet) and maximum ventilation to prevent heat build-up. Perforated trays are suited for medium to low-voltage instrumentation, power, and control cables needing continuous bottom support and partial environmental shielding.
What advantages do FRP / GRP Cable Trays provide in chemical and offshore environments?
FRP and GRP cable trays are manufactured from pultruded glass fiber reinforced resins that are entirely immune to chemical corrosion, acid exposure, salt spray, and UV degradation. They are electrically non-conductive, self-extinguishing, and eliminate the need for electrical grounding.
Which stainless steel grades are supplied for industrial cable management?
We manufacture cable trays in AISI 304 for general hygienic, pharmaceutical, and indoor clean-room environments, and AISI 316 / 316L for highly aggressive marine, coastal, oil refinery, and chloride-laden environments.
What international manufacturing standards do your cable trays comply with?
All metallic and non-metallic cable tray systems are manufactured in compliance with international standards including NEMA VE 1 / VE 2, IEC 61537, and applicable ASTM/BS EN hot-dip galvanizing specifications.
Need Custom Cable Tray Fabrication or Engineering Take-offs?
Send your project bill of quantities or structural layouts. Our engineers will verify load capacities, suggest optimal material finishes, and provide containerized export pricing.