Fiber optic cable fixing steel strand

Fiber optic cables are typically secured to steel messenger strands using lashing wire, tension clamps, or stainless steel bands to ensure stability, proper tension, and long-term durability.

Messenger Strand and Lashing Wire

A steel messenger strand is a stranded steel cable that supports the weight of aerial fiber optic cables. It usually consists of six wires wrapped around a central wire, often made of carbon steel with a zinc or zinc-aluminum coating for corrosion protection . The messenger strand is tensioned between poles to withstand the weight of the fiber cable and environmental loads such as wind, ice, or snow . Lashing wire is a thin stainless steel wire (typically 0.038" to 0.045") used to attach fiber cables to the messenger strand. It is annealed for high ductility and has a minimum strength of 70–90 kpsi. The lashing wire wraps around both the fiber cable and the messenger strand, securing the cable while allowing some flexibility for thermal expansion and movement .

Tension Clamps

For points of high mechanical stress, such as dead-end poles or angle poles, tension clamps are used. These clamps anchor the fiber cable to the pole and bear the axial load, preventing slippage or mechanical failure . A typical tension clamp kit includes:

• Pole bands and mounting hooks to attach the clamp to wood, concrete, or metal poles
• Stainless steel bands and buckles to secure the cable and clamp
• Hand-guided banding tools for tightening and cutting the bands on-site These clamps are especially useful for ADSS (All-Dielectric Self-Supporting) cables or figure-8 cables that require secure anchoring at critical points .

Stainless Steel Bands

For additional security, high-strength stainless steel bands can be used to fasten fiber cables to poles, towers, or walls. These bands provide excellent corrosion resistance and environmental stability, making them suitable for long-term outdoor installations .

Installation Considerations

• Tensioning: Ensure the messenger strand is properly tensioned to support the cable weight and environmental loads without excessive sag .
• Bending Radius: Avoid bending the fiber cable below its minimum bending radius to prevent damage .
• Corrosion Protection: Use coated steel strands and stainless steel lashing or bands to prevent rust and extend the lifespan of the installation .
• Slack Management: Include extra cable length for splicing and maintenance, and store slack properly at poles or access points . By combining messenger strands, lashing wire, tension clamps, and stainless steel bands, fiber optic cables can be securely fixed to steel supports, ensuring reliable performance and long-term durability in aerial installations.