Quick Answer
Tension high-tensile wire to 200–250 lbs of pull force using a mechanical ratchet tensioner or a come-along winch with a fence tension gauge. Attach the tensioner at a corner or brace post, pull the free wire end through, and ratchet until the gauge reads 200–250 lbs. Secure with a crimped sleeve. Install in-line ratchet strainers every 800–1,200 feet for easy future re-tensioning.
Tools Required
- Fence tension gauge (reads in lbs or kg) — $25–$60
- Ratchet fence tensioner or come-along winch
- Wire crimping tool
- Fence sleeves (correct gauge for your wire)
- Pliers and fencing grips
Tensioning Process
Step 1: Unroll the wire to the far end post without stretching. Attach one end firmly to the anchor post using a loop and crimped sleeve — don't wrap and twist.
Step 2: Attach the tensioning tool to the wire at the near corner post. Attach the other end of the tensioner to a sturdy anchor (the post or brace).
Step 3: Slowly ratchet or crank the tensioner. Attach the tension gauge between the tensioner and the wire. Monitor gauge reading as you increase tension.
Step 4: Stop at 200–250 lbs. Do not exceed 300 lbs — over-tensioning stresses corner posts and risks wire snap during cold-weather contraction.
Step 5: Secure the wire at the tensioned position with a crimped sleeve. Release the tensioner.
Temperature Adjustment
High-tensile wire expands in heat and contracts in cold. Install in moderate temperatures (40–70°F) for the best year-round tension. If installing in summer heat, add 10–15% tension above target — the wire will tighten to correct tension when temperatures drop. If installing in winter cold, reduce tension slightly to avoid snapping when even colder temperatures come.
In-Line Tensioner Placement
Install in-line ratchet strainers every 800–1,200 feet along continuous wire runs. These allow you to re-tension specific sections without dismantling the fence. On a long fence, wire tension is lost unevenly — sections with more sun exposure or livestock pressure lose tension faster. In-line strainers let you address these spots individually.
Our Recommendation
Always use a tension gauge. "Tight enough" judged by feel is usually significantly under or over the target. A fence tension gauge costs $25–$60 and ensures you hit the 200–250 lb target accurately — directly affecting fence longevity and performance. Over-tensioned wire is as problematic as under-tensioned wire, particularly in climates with significant seasonal temperature swings.