2012年8月1日星期三

How to Erect a Chain Link Fence




Chain link fence is a relatively inexpensive type of fence that blends well with the backdrop of your yard. It delivers an effective boundary around your property without the confining effects of a privacy fence, and it is highly durable. You can purchase chain link fence at many hardware and home improvement stores, and you can save some money on installation by erecting it yourself.

Installing Fence Posts


1 Determine where you want your fence to begin and dig a hole using a post hole digger. The hole should be about six inches in diameter and two feet deep. Place a post in the hole and kick in some dirt to hold it in place. The post should be sticking out of the ground at a height that is three inches less than the total height of your chain link mesh.
2 Pour in half a bag of quick-mix concrete and add water. Mix the water and concrete until it is at an even, clay-like consistency. Use a level to make sure the post is standing up straight. Press the level flat against each side of the post to ensure that it's straight in each direction. Allow the concrete to dry before topping the hole off with dirt.
3 String a line from your first post down the line of your property. Use ground stakes to hold the line tightly in place. This will be a guide for the rest of your posts.
4 For four- or five-foot-high Commercial Chain Link Fence, measure every 10 feet along the line with a tape measure and mark it with the marking paint. For six-foot-high fence, measure every eight feet and mark.
5 Dig a hole at each mark and refer to Steps 1 and 2 to set a post in each hole. Make sure each post is level and straight along the line, and that each post is at the same height out of the ground. Allow the concrete to dry and fill in each hole before proceeding.

Installing Chain Link Mesh


6 Affix a looped cap to each post and slide the top rail along the tops of the posts. Use bolts and end brackets to attach the rail to each end post. Use a hacksaw to remove any extra rail.
7 Unroll your chain link mesh along your line of posts. Use the brackets and bolts to attach the mesh to your first post. The mesh will slide between the brackets and will be held in place by the bolts and nuts. Tighten the bolts/nuts with a ratchet and socket.
8 Pull the mesh tight, affixing it to the top rails and posts with wire ties. Use pliers to bend the wire ties through the mesh and affix it to the posts and rails. Make sure the mesh is tightly pulled before securing it with the wire ties. Use three ties on each post and a tie every two feet along the top rail.
9 Use the brackets and bolts to attach the mesh to your final post, just like you did with your first post in Step 2.

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Types of Security Fences




According to the Chain Link Fence Manufacturer's Institute, a security fence gives visual notice of a legal boundary, creates a psychological trespassing deterrent and---most importantly---serves as a physical barrier between property and unwanted intruders. Some security fences are all business, forgoing aesthetics for utilitarian means, while others balance security and safety with a touch of style. Consider security needs, location and aesthetics to choose the right security fence for your property.

Chain Link

Perhaps the most common and popular form of security fencing, chain link fences came to prominence in the 1940s and 50s. Crisscrossing steel wires in the form of a mesh compose chain link fences, which are supported at intervals by line posts, corner posts and end posts, also of steel material. Chain link fences may also be topped with barbed wire for added security. According to the Chain Link Fence Manufacturers Institute, chain link fences provide "strength, corrosion resistance, 'see thru capabilities,' ease of installation, versatility, variety of product selection and value." Most chain link fences feature a two-inch mesh, but fences with an extremely high security factor may feature as little as a one-inch or three-eighths of an inch mesh; smaller meshes make chain link fences harder to climb, but reduce see-through visibility.

Welded Wire Mesh

Somewhat similar in security features to a chain link fence, the meshes of a welded wire mesh fence are---as its name suggests--joined together via welds (while chain link fence meshes are simply linked together, not welded). Galvanized steel wire generally composes welded wire mesh fences, which often come in a pattern of square or rectangular grids. Though this differs from the diamond meshes of chain link, wire mesh still provides a see-through quality. The smaller meshes of this Airport Security Fence make climbing unlikely. Welded wire mesh can be supported by steel or wooden posts, or incorporated into outdoor settings by using trees as posts. Welded wire mesh fences can be topped with barbed wire and come in various PVC coated varieties, which offer numerous color options.

Palisade

Palisade fencing offers an aesthetically pleasing security fence option. Composed of hot dipped galvanized steel, palisade fences are straight steel posts that stand vertically in line, held up by horizontal steel supports and often fixed to the ground with base plates. According to manufacturer Anping Qiyuan Netting Company, palisade fences are strong, stable and rust-resilient---they also provide a see-through quality. These steel security fences are often tall (up to 3.6 meters) and difficult to climb; posts come in "D" section or "W" section shapes, with the W shape's concave construction making the fence even harder to climb. For additional security, many palisade fence posts feature pointed or multi-pointed tips. Palisade fencing comes in a variety of colors, creating by fixing colored galvanized steel plate to the posts.

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How to Bias Cut on a Chain Link Fence


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When installing a chain link fence on a hill, the chain link fabric will not line up with a terminal post. In order to get the fabric flush with the terminal post, you have to cut the fabric on an angle, which is called a bias cut. Following the correct bias cutting procedures will prevent you from cutting too much or too little and leave the fence looking as good as possible.

Instructions


1 Tie the chain link fabric loosely to the top rail. Pull the fabric past the terminal post to see how far one end of the fabric goes past the post.
2 Insert the tension bar through the chain link fabric at an angle. Try to keep the tension bar parallel to the terminal post. Stretch the chain weaves, if needed, in order to slide the tension bar through.
3 Use chain cutters to cut away fabric that is past the tension bar. Begin your bias cut with the side of the Galvanized Chain Link Fence that does not overlap the terminal post. Cut the fabric in the middle of the diamond and away from any weaves, so that the remaining weaves are strong enough to remain in place. Make sure to leave enough fabric after the cut so that you can bend it back over the tension bar.
4 Remove the excess fabric as you cut it. Remember that chain link fencing is made of vertical strands of woven chain. After you make a cut, go to the side of the fabric that is past the terminal post and use your pliers to undo the last knuckled end. Once the end is free, you can remove the chain by turning it; it will come free like a corkscrew. Removing the excess fabric as you go will reduce the number of cuts you have to make.
5 Use pliers to bend the leftover fabric over the tension bar. There should be less than an inch of fabric left after each of your cuts. Because the cut fabric is sharp, you want to bend it over to remove it as a potential hazard.

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What Is FE6 Security Fencing


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FE6 designates a specific variety of security fence as recognized by the US Army Corps of Engineers. This chain link fence has several additional features that make it sturdier and more secure than other fences.

Construction


An FE6 fence is made up of 2-inch chain mesh supported on posts no farther than 10 feet apart. Each section of fence is braced by two rails and a truss for added stability.

Security


The most striking feature of an Perimeter Security Fence is the three stacked strands of barbed wire strung along the fence's top and kept straight by bracing arms at the top of each post. The wire protrudes outward at a 45-degree angle to further deter intruders.

Similar Fences


The FE6 is one of several fence models with similar designations. The FE5 shares many construction features with the FE6, but lacks the barbed wire. An FE7 fence has the FE6's three strands of barbed wire, while the FE8 uses them in addition to a large coiled roll.

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