Materials & Finishes

Our Materials


Aluminum makes up approximately 75% of the market demand in the United States, and it is the most popular material used to manufacture ladder-type cable trays. Few other materials exhibit such a unique combination of properties. Aluminum is lightweight but strong, has good electrical conductivity, excellent formability, and is resistant to corrosion with an attractive finish. All of these factors make aluminum the ideal material for cable trays. It is suitable for indoor and outdoor use, and easy to handle and cut in the field.

Alloy 6063 is an extruded material that is used to produce cable tray side rails, rungs, and splice plates. This is a high-strength, copper-free alloy that is used in the extrusion process.

Alloy 5052 is sheet material that is used to produce flat-sheet solid bottoms and a wide variety of components and accessories. This is a high-strength, copper-free alloy.

Alloy 3003 is sheet material that is used to produce covers for cable trays. This is a copper-free alloy that is commonly used in the industry for covers.

Stainless Steel

Type 316 Stainless Steel is often referred to as “Marine Grade” stainless steel. This is one of the most corrosion-resistant metals available. United Structural Products offers fasteners made of this material for applications where corrosion is a special concern. Type 316 stainless steel contains a high amount of chromium. This forms a passive film of chromium oxide on the surface of the metal, protecting it and blocking corrosion from spreading into the metal’s internal structure.

Our Finishes

Geomet Plating

This is our standard finish for screws, nuts, and splice plates. Geomet is a non-toxic, chromium free coating that is highly corrosion resistant against salt, humidity, solvents and a wide variety of corrosive elements. Geomet coatings contain metallic zinc and aluminum flakes, giving it good electrical conductivity. These two benefits make Geomet ideal for use on fasteners for metal cable trays.  Read more about Geomet coatings here.

Powder Coating

Our aluminum cable trays can be painted with a wide variety of coatings in many different colors. The powder coating process can be used to apply polyester, epoxy, polyurethane, and TGIC coatings in dozens of colors and finishes.  For color charts and more information, click here.