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2. Single-wire earth return - Wikipedia

   en.wikipedia.org/wiki/Single-wire_earth_return

   SWER's high line voltage and low current also permits the use of low-cost galvanized steel wire (historically, No. 8 fence wire). [9] Steel's greater strength permits spans of 400 metres (¼ mile) or more, reducing the number of poles to 2.5 per kilometre (4 per mile). If the poles also carry optical fiber cable for telecommunications (metal ...

3. Barbed wire - Wikipedia

   en.wikipedia.org/wiki/Barbed_wire

   Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is the construction of inexpensive fences , and it is also used as a security measure atop walls surrounding property.

4. Chain-link fencing - Wikipedia

   en.wikipedia.org/wiki/Chain-link_fencing

   Chain-link fencing showing the diamond patterning A chain-link fence bordering a residential property. A chain-link fence (also referred to as wire netting, wire-mesh fence, chain-wire fence, cyclone fence, hurricane fence, or diamond-mesh fence) is a type of woven fence usually made from galvanized or linear low-density polyethylene-coated steel wire.

5. Steel fence post - Wikipedia

   en.wikipedia.org/wiki/Steel_fence_post

   A steel fence post, also called (depending on design or country) a T-post, a Y-post, or variants on star post, is a type of fence post or picket. They are made of steel and are sometimes manufactured using durable rail steel. They can be used to support various types of wire or wire mesh.

6. Agricultural fencing - Wikipedia

   en.wikipedia.org/wiki/Agricultural_fencing

   Between these braced posts are additional smaller wooden or metal posts which keep the wires spaced and upright, usually 3 to 6 metre (10 to 20 feet) apart, depending on the style of fencing used. Traditionally, wire fencing material is made of galvanized mild steel , but galvanized high-tensile steel is now also used in many places.

7. Perimeter fence - Wikipedia

   en.wikipedia.org/wiki/Perimeter_fence

   The level of protection offered varies according to the threat level to the perimeter. Different types of perimeter fencing include: Chain-link fencing; Metal railings; Palisade fencing; Rolled mesh fencing; Timber fencing; Welded wire mesh fence fencing; Vertical bar fencing has been the most popular form of perimeter security fence since the ...