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Accessories required for installing seismic bracing for cable trays

Fiber optic splice closure knowledge brief Published 12 Oct 2020

Prepared for preliminary research by the RIVO OPTICAL knowledge desk. Confirm cable count, splice capacity, sealing class, tray layout, protection sleeves and installation requirements against current standards and product documentation.

Seismic bracing for cable trays requires wire rope or cable assemblies, clamps, sleeves, threaded rods, universal restraint clips, and appropriate fasteners to secure the system to structural members.Key Accessories

1. Wire Rope/Cable Assemblies

  • Pre-stretched aircraft cables or wire ropes are used to provide tension and absorb seismic loads.
  • Available in various diameters (e.g., 3/32", 1/8", 3/16") and lengths (10 ft., 20 ft., or spools) depending on the installation requirements . 2. KwikWire or Oval Sleeves
  • Oval sleeves secure the cable loop and maintain the strength of the brace.
  • Crimping tools like the Locoloc® hand swager are used to properly secure the sleeves . 3. Universal Restraint Clips (URC)
  • Connect the wire rope or cable brace to the cable tray support member.
  • Accommodates multiple cable sizes and hardware diameters (1/4" to 1-1/4"), . 4. Threaded Rods and Fasteners
  • 3/8" or 1/2" threaded rods are commonly used for trapeze installations.
  • Fasteners attach the braces to structural members such as beams, ceilings, or concrete decks . 5. Bracing Members
  • Lateral (transverse) and longitudinal braces are required to stabilize the cable tray in two directions.
  • Can be cable bracing (tension only) or rigid bracing (tension and compression), depending on drop length and code requirements . 6. Clamps and Eyelets
  • Pre-attached eyelet end fittings or clamps like KwikWire tool-less clamps allow quick attachment to structural supports without drilling . 7. Color-Coded Tags
  • Used for visual verification of correct cable size and load rating during installation . 8. Optional Accessories
  • Rod stiffeners to maintain system rigidity.
  • Anchors or hangers compatible with the building structure.
  • Predrilled tabs for direct attachment to concrete decks .
Installation Considerations
  • Braces must be installed at intervals specified by local codes (e.g., every 30 feet for long runs).
  • Both lateral and longitudinal bracing are required to ensure seismic compliance .
  • All components should meet UL listing and minimum breaking strength requirements for safety .
  • Coordination with structural engineers is recommended to verify attachment points and load capacities . By using these accessories and following proper installation guidelines, cable trays can be effectively braced to withstand seismic events, ensuring system integrity and safety in critical infrastructure .

Accessories required for installing seismic bracing for cable trays - RIVO MULTITRADE OPTICAL SYSTEMS [PDF]

Accessories required for installing seismic bracing for cable trays

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This reference is intended for preliminary fiber optic splice closure research. Compatibility, splice capacity, sealing class, tray layout, protection sleeves, installation methods, test limits and applicable standards must be verified for the specific project.

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