Installing fence cable wire requires setting braced end posts, threading cable through line posts, and applying 200–250 lbs of tension with a ratchet strainer.
A fence is only as strong as its wire tension, and that starts with the posts. Installing fence cable wire means setting braced end posts first, running stainless or high-tensile cable through properly spaced line posts, tensioning each strand to 200–250 lbs with a ratchet strainer, and securing it with crimped sleeves or Gripple fasteners. Here is the full process from post hole to final trim.
Planning Your Fence Layout and Setting Posts
Post spacing determines how much sag you will fight later. For cable railing on decks or balconies, space intermediate posts no more than 4 feet apart. For high-tensile or barbed wire fencing, line posts can be 8–12 feet apart. Corner, end, and gate posts need the most support — dig holes 2–3 feet deep and backfill with concrete. For high-tensile wire, use steel posts or heavily braced wood — lightweight aluminum posts are not suitable unless specifically rated for the tension. Always set the end posts first, brace them diagonally, and run string lines to align the intermediate posts.
What Cable and Hardware Do You Need?
The right cable depends on the application. For corrosion resistance near buildings or decks, use 304 or 316 stainless steel cable. For livestock fencing, 14-gauge to 12-gauge galvanized high-tensile wire is more economical. Common diameters are 1/8 inch (3.2 mm) for deck railings and 3/16 inch (4.8 mm) for perimeter fences. If you are ready to buy, our tested roundup of the best fence cable wire options can help you pick the right product for your project.
Key hardware includes crimping sleeves with a crimping tool, , U-bolt connectors, , and a tension gauge ($30–$50). Galvanized staples should be 1.5 inches minimum — 1.75 or 2 inches is better. For electric fencing, string the wire on the inside of line posts and the outside of curves. For high-tensile, string on the side receiving animal pressure.
| Cable Type | Common Diameter | Best For | Approximate Cost |
|---|---|---|---|
| 304 stainless cable | 1/8 in (3.2 mm) | Deck railings, balconies | $0.50–$0.80 per foot |
| 316 stainless cable | 3/16 in (4.8 mm) | Perimeter fences, coastal areas | $1.20–$1.80 per foot |
| 14-ga galvanized high-tensile wire | ~1/12 in | Livestock fencing | $40–$60 per 1,320-ft roll |
| 12-ga galvanized high-tensile wire | ~1/10 in | Heavy livestock, deer exclusion | Varies by supplier |
Running and Tensioning Your Fence Cable
Follow this sequence for a clean, taut installation. Start by attaching end fittings to one end of the cable using a crimping tool. Run the cable through holes in the intermediate posts, then secure the far end with a Gripple, crimp sleeve, or U-bolt. Attach tensioners at both ends. For high-tensile wire, use a ratchet strainer to reach 200–250 lbs of tension — the BC Ministry of Agriculture’s wire fence manual specifies starting at the top strand and working downward.
Use a tension gauge to avoid over-tensioning, which can snap the wire or pull posts crooked. For cable railings, start tensioning with the middle run of infill, then work outward alternating top and bottom — this keeps the frame square. Drive staples diagonally and leave 1/8 inch of play to allow for wire expansion and contraction with temperature changes. Trim excess cable, leaving about 2 feet of slack if using Gripples, and secure the ends with decorative caps. , and the tension gauge should read within your target range.
FAQs
What tension should I use for high-tensile fence wire?
High-tensile wire should be tensioned to 200–250 lbs, starting at the top strand. Use a tension gauge to get it right — over-tensioning can snap the wire, while under-tensioning leaves the fence loose and prone to sagging over time.
How far apart should fence posts be for cable wire?
For cable railing on decks or balconies, space posts no more than 4 feet apart. For high-tensile or barbed wire fencing, line posts can be 8–12 feet apart. Corner and end posts need concrete footings 2–3 feet deep for adequate support.
What is the best cable for a fence installation?
For corrosion resistance and longevity, 304 or 316 stainless steel cable works best for railings and perimeter fences. For livestock, 14-gauge to 12-gauge galvanized high-tensile wire is more cost-effective. Use 1/8-inch diameter for railings and 3/16-inch for heavier perimeter fencing.
References & Sources
- BC Ministry of Agriculture. “Wire Fence Construction.” Specifies 250 lb tension and post spacing for high-tensile fencing.
- Nutrien Ag Solutions. “Fencing Handbook.” Covers hardware selection, tensioning, and installation procedures.
- University of Georgia Extension. “Fences for the Farm.” Practical guide to farm fencing materials and methods.