Catenary
FAQs
A catenary system is used to support overhead fibre or copper cables using a tensioned steel wire. It provides a safe, secure, and load bearing route where:
- No pole infrastructure exists
- Buildings need overhead cable spans
- Dropwires require extra support
- Fibre needs to cross roads, alleys, yards, or site perimeters
By separating the support wire (catenary) from the cable being carried, engineers prevent damage and ensure long term stability in outdoor environments.
Netceed offers all components required to build and tension a compliant catenary system:
- Catenary steel wire kits are complete sets for overhead cable support
- Steel wires (various gauges) are primary load bearing support wire
- Expanding eyebolts and wall plates secure anchors into buildings or walls
- Steel wire tensioners (turnbuckles) apply and adjust wire tension
- Steel wire grips & thimbles create secure wire loops and terminations
- Suspension wire grips support dropwires or fibre spans
- Protection sleeve dropwires prevent abrasion where wires run across edges
- Fibre cable support kits are pre-configured hardware for fibre specific installations
- Grip pulling tools for tightening and tensioning catenary wires safely
All items are suitable for outdoor telecom and FTTx overhead cabling.
Selecting the right hardware depends on span length, load, and environment:
Short spans (up to 20m)
- Standard steel wire kits
- Basic tensioners and wall plates
Medium or long spans
- Heavier gauge steel wire
- Multiple wire grips and thimbles
- Stronger anchor points (expanding eyebolts)
For fibre optic use
- Choose fibre specific support kits with protective sleeves
- Ensure suspension grips match cable diameter
For exposed/coastal areas
- Use galvanised or stainless steel wire for corrosion resistance
The correct combination ensures safe tension, minimal sag, and long term reliability.
To ensure a safe and compliant overhead installation:
- Use proper anchors (eyebolts, wall plates) on solid surfaces
- Fit thimbles in all wire loops to prevent crushing or wear
- Tighten using wire tensioners/turnbuckles and recheck after loading
- Use protection sleeves on sharp edges or building corners
- Fit suspension wire grips that match the cable size
- Avoid exceeding recommended wire tension or cable load
- Always use PPE and consider working-at-height safety requirements
A correctly installed catenary system prevents damage to both the support wire and the fibre/copper cable over time.