Specifications of Angle Iron for Cable Trays
Angle irons for cable trays are typically slotted steel angles, with lengths up to 3 meters, slot dimensions around 7x30 mm, and made from galvanized or stainless steel to meet structural and corrosion requirements.
General Specifications
Material and Finish: Angle irons used for cable tray supports are commonly made from mild steel, galvanized steel, or stainless steel (AISI 316L) to ensure strength and corrosion resistance in various environments . Galvanized steel may follow ASTM A123 for hot-dip zinc coatings, while stainless steel provides enhanced resistance to chlorides and corrosive conditions . Dimensions and Slots: Standard angle irons often have lengthwise slots measuring 7x30 mm on one side, allowing flexible mounting of cable trays, ladders, and electrical installations . Predefined lengths are typically available up to 3 meters, with increments of 100 mm on request . Thicknesses commonly range from 1.6 mm to 3 mm, depending on load requirements . Structural Standards: Angle irons must comply with relevant structural and electrical standards, including ANSI/NFPA 70 (NEC) for electrical safety, and NEMA VE 1 for metallic cable tray systems . Steel sheet specifications may follow ASTM A653, A1011, or A1008 for structural quality and formability . Installation Considerations: Angle irons are used as supports for straight sections, bends, tees, and drop-outs of cable trays. They are fastened using high-tensile bolts, washers, and nuts (commonly M8 hardware) at intervals determined by the cable load and tray type . Proper spacing ensures stress-free cable installation and maintains the minimum bend radius for cables . Corrosion Protection: For outdoor or corrosive environments, hot-dip galvanization or stainless steel is recommended. Stainless steel angles may include molybdenum and chromium to enhance corrosion resistance, particularly in chloride-rich environments . Summary Table of Typical Angle Iron Specs for Cable Trays
| Feature | Specification |
|---|---|
| Material | Mild steel, galvanized steel, stainless steel (AISI 316L) |
| Slot Size | 7 x 30 mm longitudinal slots |
| Length | Up to 3 m (increments of 100 mm) |
| Thickness | 1.6–3 mm |
| Hardware | M8 bolts, nuts, washers |
| Standards | ANSI/NFPA 70, NEMA VE 1, ASTM A123/A653/A1011/A1008 |
| Corrosion Protection | Hot-dip galvanization or stainless steel |
These specifications ensure that angle irons provide structural support, flexibility in mounting, and durability for cable tray systems in industrial, commercial, and outdoor installations .
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