Permanent Fencing

High-Tensile

The first, third, fifth, and seventh wires are electrified in this seven-strand system.

High-tensile is a type of smooth wire fence that is electrified to keep animals contained. It is probably the most widely used type of perimeter fencing. High tensile is very economical and works well for keeping livestock - especially cattle - contained.

Posts are generally placed 20 to 40 feet apart, depending upon terrain, with 4 to 6 wires stapled to the posts for perimeter fencing. Typically, two or three of the wires are electrified using a fence charger. Subdivision or internal fencing might only consist of 1 to 3 wires.

Droppers (battens) are vertical posts that wires run through the wires to add rigidity to the fence when posts are long distances apart or when fencing travels over very uneven ground. They are on the fence but not placed in the ground, with the advantage of being less expensive and less labor than installing an additional fence post. So, for example, you may have the option of placing a post every 20 feet without battens, or you could space out the posts to every 25’ feet with battens in between posts.

Battens come in wooden or plastic versions. Here, you can see the post on the left, with two smaller, wooden battens to the right.

Because of the high tension on the wires, you’ll need to brace the corners and ends to prevent the posts from being pulled out of the ground. You’ll also need to keep weeds and other plant material off the wires to maintain the electrical charge and keep animals properly contained.

Woven Wire

High tensile woven wire fence

Woven wire fencing is another option commonly used in Pennsylvania, but the cost is much higher than high-tensile. This type of fencing is very useful for goats and other animals that are harder to control because it provides a more impenetrable barrier. It is also useful to keep predators, such as coyotes, from entering a pasture.

One electrified wire is often strung on the inside of the fence to keep animals from rubbing on the woven wire or from leaning over the fence to reach grass on the other side.

Post and Rail or Post and Board

Post and rail fence

Post and rail or board fence can also be used, but, like woven wire, it is much more expensive than high-tensile fencing. Usually, the materials used to make these fences are treated to extend the life of the fence. Posts are generally set every eight feet. A single strand of electrified wire is often installed on the inside of the fence to prevent animals from pushing through the fence or damaging fencing when trying to graze on the outside of the pasture.

One of the challenges of electric fencing is protecting the energizer from lightning strikes. Lightning can strike one of the wires and the electricity will travel through the fencing system to the energizer.

Here are a few methods to help prevent burning down a building and prevent damage to the energizer.

1. Install the energizer on a post outside of, but near the building with the power supply. Cover the energizer to protect from the weather.
2. Use a good quality surge protector. Many times, the power surge that damages the energizer comes from the electrical supply rather than through the fence system.
3. Install a lightning choke or lightning coil that will stop the lightning strike from getting to the energizer. The premise of these is that the electricity from the lightning strike travels so quickly into the choke or coil that it “jumps” off the system.
4. Connect all the electrified wires to the grounding system or the lightning arrestors.
5. Unhook the energizer from the fence system whenever severe storms are forecast.

There are several things to consider when designing your paddocks. You’ll need to think about:

• the lay of the land,
• access to shade and water sources, and
• the placement of gates and lanes/alleys (paths for moving livestock back and forth from handling facilities or buildings).

A good rule of thumb is to use temporary fencing for several years to allow you to determine the best paddock size and layout before installing more permanent subdivision fencing. Keep in mind that staying with temporary fencing indefinitely allows more flexibility in paddock sizes and assures that you have the option to perform machinery operations, such as renovation and hay-baling without permanent fence in the way making these tasks difficult and time consuming.