1. Key Components

Wire Strands: Typically made of galvanized steel, stainless steel, or polymer-coated steel for durability.

Barbs: Sharp projections (usually 2- or 4-pointed) spaced regularly to deter crossing.

Twist Pattern: Wires are twisted together to hold barbs in place and add structural strength.

2. Common Materials

Galvanized Steel: Zinc-coated to resist rust; classified as Class 1 (light), 2 (medium), or 3 (heavy-duty).

Stainless Steel: Used in corrosive environments (e.g., coastal regions).

PVC-Coated Steel: Adds weather resistance and color options (e.g., green, black).

3. Specifications

Gauge (Thickness):

12.5 Gauge (2.77 mm): Heavy-duty for livestock and high-security areas.

14 Gauge (2.03 mm): Lightweight, ideal for temporary fencing.

Barb Spacing:

4–6 inches (10–15 cm): Tighter spacing (4") for security; wider (5–6") for agriculture.

Tensile Strength:

Standard: 40,000–80,000 psi.

High-tensile: Up to 220,000 psi for minimal sagging.

4. Applications

Agriculture:

Contains cattle, sheep, and horses.

Uses 12.5-gauge galvanized wire with 5" barb spacing.

Security:

Protects prisons, military sites, and industrial zones.

Combines high-tensile wire, 4" barb spacing, and PVC coatings.

Boundary Marking:

Defines property lines and deters trespassers.

5. Installation Tips

Posts: Use sturdy wooden or metal posts spaced 10–15 feet apart.

Tensioning: High-tensile wire requires tensioning tools to prevent sagging.

Safety: Wear gloves and protective gear to avoid injuries from barbs.

6. Standards and Certifications

ASTM A121: Governs galvanized barbed wire quality in the U.S.

ISO 13440: International standards for agricultural fencing.

7. Environmental Considerations

Coastal Areas: Use stainless steel or Class 3 galvanized wire.

UV Exposure: Opt for PVC-coated wire to prevent degradation.