Adding tension wire to a chain-link fence provides stability and security from dogs or people who try to go under a fence. The wire holds the chain link in place low to the ground very tightly so that it cannot bend at the bottom. Tension wire generally is installed after the poles are set for a new chain-link fence and before the fence installation. The wire is positioned between the mesh and the poles.
Attach a brace band to a corner post by placing it on the post about 2 inches from the bottom. Insert a brace band bolt through the holes in both ends and screw on a nut on the backside. Hand-tighten the bolt while holding the nut with the other hand.
Pull the loose end of the tension wire from its roll about 6 feet long and loop through the brace band bolt with an extra tail of 6 to 8 inches long. Wrap the tail in a circular motion around the next 6 to 8 inches of tension wire that leads to the next post. Tighten the wrapping, using pliers and moving around it in a circular motion. Tighten the brace band bolt with pliers while holding the nut with a second pair of pliers.
Unroll the tension wire by walking along the fence line to the next corner or terminal post. Walk 6 to 8 inches beyond the post and cut the wire at this point. Attach the wire to a come-a-long and attach the come-a-long to the post with a sling made of rope or a towing strap. A come-a-long is a manually-operated winch. You may use an electric winch in the same fashion.
Depress and release the come-along handle to tighten the tension wire with each repetition. Make the tension wire as tight as you can, using this method. Attach a brace brand to the post 2 inches from the bottom by placing the bolt through both end holes and screw the nut on hand tight. Insert the loose end of the tension wire around the bolt and loop the additional wire around the tightened part of the tension wire. Tighten the brace brand completely with two sets of pliers as on the other end. Tighten the loops around the tight wire with pliers as on the other end.
Release the come-along. Repeat for each stretch of fence between terminal poles around the fence line. Add chain-link mesh on the fence on the inside of the area so that the tension wire is between the poles and the mesh.