Dimensions of Aluminum Profile Cable Trays
Aluminum cable trays are available in ladder-style and long-span designs with widths from 12" to 36", rung spacing of 6", 9", or 12", and load ratings up to 528 lb/ft depending on span and class.
General Specifications
- Material: Extruded aluminum alloy with H-beam or I-beam side rails for high strength-to-weight ratio and corrosion resistance .
- Tray Types: Ladder-style, ventilated, and long-span sections for industrial and commercial applications .
- Rung Spacing: 6", 9", or 12" centers; every second rung may be reversed for easy cable tie or clamp installation .
- Edge Design: Rounded and smooth edges to prevent cable damage .
- Ventilation: Openings in the bottom allow airflow; maximum spacing between transverse elements is 102 mm (4 in.), .
Dimensions and Load Ratings
| Tray Width | Tray Depth | Rung Spacing | Load Class / NEMA | Max Load (lb/ft) | Support Span (ft) | Deflection (in.) |
|---|---|---|---|---|---|---|
| 12" | 4"–8" | 12" | AH1-8 | 528 | 18 | 2.136 |
| 18" | 4"–8" | 12" | AH1-8 | 428 | 20 | 2.637 |
| 24" | 4"–8" | 12" | AH1-8 | 353 | 22 | 3.191 |
| 30" | 4"–8" | 12" | AH1-8 | 297 | 24 | 3.797 |
| 36" | 4"–8" | 12" | AH1-8 | 253 | 26 | 4.456 |
| 36" | 4"–8" | 12" | AH1-8 | 218 | 28 | 5.169 |
Note: Load ratings are based on simple span support with deflection measured at the midpoint; continuous spans may reduce deflection by up to 50% .
Additional Features
- Snap-in Splice Plates: Provided with each straight section for fast assembly .
- Extra Load Capacity: Each tray section can support an additional 200 lb concentrated load on any portion of the tray beyond the published load class .
- Applications: Suitable for oil and gas, pulp and paper, mining, food and beverage, and commercial infrastructure .
- Compliance: Meets NEMA, CSA, and UL standards; suitable for use as equipment grounding conductors .
Selection Guidelines
- Environment: Choose material and finish based on exposure conditions (indoor, outdoor, corrosive environments), .
- Load and Span: Determine tray series using NEMA/CSA load/span designations .
- Tray Size: Select nominal depth and width based on cable loading and installation requirements .
- Accessories: Include splice plates, bolts, nuts, and washers for complete assembly . This table and specifications provide a comprehensive reference for selecting aluminum cable trays for industrial and commercial electrical installations, ensuring proper load support, span, and compliance with safety standards.
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