The first step in manufacturing a cable tray is choosing the right material based on strength, corrosion resistance, and environmental conditions. Common materials include steel, stainless steel, aluminum, and fiberglass. Steel is widely used for its durability, stainless steel for corrosive environments, aluminum for lightweight applications, and fiberglass for chemical or outdoor exposure .
Raw materials are cut to precise dimensions using laser cutting, punching, or shearing equipment. This ensures uniformity and smooth edges, which are critical for safety and proper assembly . The cut pieces form the base, sides, and rungs of the tray.
To create a 30-degree bend, the tray components are processed using press brakes or roll forming machines. Skilled operators calculate bend allowances and springback to achieve the exact angle without compromising structural integrity . For ladder-type or perforated trays, the rungs and side rails are bent simultaneously to maintain alignment.
After bending, the tray sections are welded or mechanically fastened to form a continuous structure. Welding ensures strength at joints, especially for angled sections like a 30-degree bend. For modular systems, pre-fabricated 30-degree elbows can be assembled with bolts or rivets .
The tray undergoes surface treatments such as degreasing, cleaning, galvanizing, or powder coating to enhance corrosion resistance and durability. Stainless steel trays may receive passivation to form a protective oxide layer .
Manufacturers perform mechanical and corrosion resistance tests to ensure the tray meets standards such as IEC 61537. This includes verifying load-bearing capacity, dimensional accuracy, and proper angle formation .
Producing a 30-degree cable tray involves:
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