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Application for Harsh Environment
Chain link fabric
Chain link fencing is the type of structural barrier most commonly used to enclose restricted areas where fencing is required.
Security fences can be fabricated with 9 gauge (3.9 mm) steel wire mesh material (before any coating) with mesh openings not larger than 2 inches (50.8 mm) per side. Ensure the fabric height is 7 feet (2.1 m) and has twisted and barbed selvage at the top and bottom.
Chain link fence designed for harsh environments (desert temperatures very high during the day and very low during the night, high exposure to sun UV, humidity, salty environment). We are basically seeking a quality fence that can resist harsh environmental conditions.
Polyester, galvanized and PVC coatings do not survive for long in these conditions and require frequent replacement. Some of the better fences are coated with a polyolefin elastomer that meets the requirements of the ASTM (American Society for the Testing of Materials) for both fencing mesh (F668) and framework (F1063).
We ensure accessories such as steel fittings and components used in the erection of chain-link fences meet the requirements of international standards.
Security fencing for restricted areas will consist of a single-line fence surrounding the restricted area.
Chain Link Fence Fabric Mounting
Fence fabric will be mounted on steel posts. Tension wires will either be interwoven or clipped along the top and bottom row of fabric diamonds. The wire fabric will be secured to posts and tension wires. When a more secure manner of attaching the fabric to posts is desired, a power driven fabric and wire fastener, depicted. If the ties or fasteners are coated or plated, the coating or plating must be electrolytically compatible with the fence fabric to inhibit corrosion.
The bottom of the fabric will extend to within 2 inches (50.8 mm) of firm soil. Where stabilization of the soil cannot be accomplished, a soil engineer should be consulted and involved in developing the fence specification.
In unstable or shifting soil such as sand, the fabric should either be buried to compensate for the shifting soil or a minimum of 2 inches (50.8 mm) of the bottom selvage of the fence anchored in concrete curbs, sills, hooked steel bars, or similar types of anchoring devices extending below ground level as recommended by the soil engineer. (Frost levels should also be considered when placing curbs, sills) Even in unstable and shifting soil, the height of fabric and posts must be designed to assure that the top of the fence fabric will be maintained at 7 feet (2.1 m) above existing or anticipated ground level. This often may require that the fabric be 8 feet (2.4 m) or greater, so that sufficient material is buried below the surface or embedded in concrete sills.
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