Cable tray lifting ring dimensions

Cable tray lifting rings are sized based on tray type, load capacity, and span, with specifications typically aligned to NEMA VE 1/VE 2 standards and manufacturer guidelines.OverviewCable tray lifting rings are used to safely lift and install cable trays, ensuring the load is evenly distributed and within the tray's rated capacity. The size and type of lifting ring depend on:Tray type: Ladder, trough, solid bottom, or channel type .Tray width and depth: Wider or deeper trays require larger or multiple lifting rings .Load rating: Determined by the tray's maximum allowable load per NEMA or UL standards .Span between supports: Longer spans may require reinforced lifting points or multiple rings .Typical Sizing ConsiderationsMaterial and Strength: Lifting rings are usually made of galvanized steel or stainless steel to match the tray's corrosion resistance and mechanical strength .Load Factor: The lifting ring must support at least the maximum concentrated load of the tray plus a safety factor (commonly 1.5 to 2.0), .Attachment Method: Rings are attached via pre-drilled holes or brackets on the tray side rails or cross members, ensuring proper alignment with the tray's center of gravity .Reference Table for Lifting Ring SelectionTray Width (in)Tray TypeMax Load (lbs)Recommended Lifting Ring SizeNotes12–18Ladder/Trough200–4001/2"–5/8" diameter steel ringSingle ring at center for short spans24–36Ladder/Trough400–6005/8"–3/4" diameter steel ringTwo rings recommended for spans >3 m36–48Ladder/Trough600–9003/4"–7/8" diameter steel ringReinforced side brackets recommended12–36Solid Bottom200–5001/2"–3/4" diameter steel ringEnsure ring aligns with tray center of gravity24–48Channel Type300–8005/8"–7/8" diameter steel ringUse multiple rings for long spansNote: Values are indicative based on NEMA VE 1/VE 2 load ratings and Eaton/Legrand cable tray specifications . Always verify with manufacturer data.Installation TipsEven Load Distribution: Use multiple lifting rings for trays longer than 3–4 meters to prevent bending or deflection .Check Deflection: Ensure tray deflection under lifting load does not exceed the manufacturer's recommended limits .Compliance: Follow NEMA VE 2 installation guidelines and local electrical codes for lifting and support .Manufacturer ReferencesLegrand Cable Trays Technical Guide: Provides accessory dimensions and load considerations for lifting points .Eaton B-Line Series Catalog: Includes load ratings, span tables, and design factors for selecting lifting rings .NEMA VE 1/VE 2 Standards: Define metallic cable tray system loads, spans, and installation practices relevant to lifting ring sizing . By referencing these guides and tables, engineers can select the correct lifting ring size and placement to ensure safe handling and installation of cable tray systems.