Cable tray elbows are available in a variety of widths, heights, radii, and materials to accommodate directional changes in cable tray systems.

Dimensions and Sizes

Width and Height:

• Standard widths range from 6 inches to 36 inches, depending on the tray type and application .
• Rail heights typically range from 4 inches to 7 inches for aluminum ladder or solid bottom trays .
• NEMA-classified elbows have side rail flange widths from 1-1/8 inches to 2-3/4 inches, depending on the tray class and load requirements . Radius Options:
• Horizontal and vertical elbows are available with radii from 12 inches to 36 inches for aluminum trays .
• Snap Track systems offer short radius elbows of 3" and 6" and long radius elbows of 12", 24", and 36" .
• GRP elbows, such as the KKB-R600, have a 600 mm (approx. 23.6 inches) radius for large 90° bends .

Material and Construction

• Aluminum: Lightweight, corrosion-resistant, suitable for ladder and solid bottom trays .
• Glass Fiber Reinforced Polyester (GRP): Durable, non-conductive, and suitable for industrial environments .
• Steel (galvanized or stainless): Common in heavy-duty or high-load applications, often with 12-gauge thickness for Snap Track systems .

Configurations

• Horizontal Elbows: Change direction in the horizontal plane; available in 90° and 45° angles.
• Vertical Elbows: Change direction in the vertical plane; available as inside or outside bends.
• Specialty Fittings: Tees, reducers, crosses, and branches are available to integrate with elbows for complex routing .

Installation Features

• Many elbows include splice plates or push pins for secure attachment .
• Cable tie-down holes (typically 3/8") are provided for radii 12" and larger to secure cables .
• Compatibility with NEMA classes ensures proper load-bearing and structural integrity .

Practical Considerations

• Selecting the correct elbow radius is critical to prevent cable damage and maintain bend radius compliance.
• Material choice affects corrosion resistance, weight, and electrical conductivity.
• Width and height must accommodate the total cable fill while allowing for heat dissipation and future expansion . By considering these specifications—width, height, radius, material, and configuration—engineers and installers can ensure that cable tray elbows meet both structural and electrical requirements for safe and efficient cable management.