Unlike ordinary protective netting, Galvanized Hog Wire Fencing are subjected to long-term impacts from livestock, including collisions, biting, squeezing, and friction, as well as external loads such as wind, snow, and terrain deformation. Therefore, strength is the most crucial and non-negotiable indicator in the procurement decision. Many overseas buyers, in their initial purchases, only focus on price, wire diameter, appearance, or galvanization, neglecting the comprehensive strength system. This leads to problems later on, such as mesh deformation, weld detachment, fence collapse, and livestock escape, increasing maintenance costs and potentially causing livestock safety accidents.
In fact, the "strength" of Galvanized Hog Wire Fencing is not a single indicator, but a comprehensive performance system comprised of multiple dimensions, including raw material strength, structural strength, welding strength, mesh mechanical strength, impact resistance, tensile strength, deformation resistance, and long-term service strength.
Galvanized Hog Wire Fencing differs from ordinary horticultural and livestock netting. Its application environment is characterized by high dynamics, high load, and high destructive potential. Pigs can weigh 150–350 kg, and fattening pigs exert tremendous impact force, making ordinary strength fences prone to deformation. Pigs have rooting, biting, and squeezing habits, causing rapid damage to weak points in the netting. Large-scale pig farm fences are often thousands of meters long; a local break can easily trigger a chain reaction of collapses. Outdoor use requires withstanding continuous stress from wind and snow loads, foundation settlement, and terrain undulations. Overseas engineering procurement and long-term cooperation projects require a service life of 15–25 years, which low-strength products cannot meet. Strength directly determines the fence's durability, maintenance-free operation, controllable livestock safety, risk of escape and injury, total life-cycle cost, and compliance with the technical standards of overseas bidding projects.
The strength of raw materials is the fundamental determining factor for the strength of Galvanized Hog Wire Fencing, mainly reflected in four aspects: wire material, tensile strength, elongation, and hardness. Q195 low-carbon steel wire has a lower cost and better toughness, suitable for light use, indoor fencing, and small poultry farming. Its tensile strength is approximately 350–400 MPa, with moderate impact resistance. Q235 high-quality low-carbon steel wire balances strength and toughness, suitable for most pig farms and cattle/sheep farms. Its tensile strength is 400–500 MPa, and its impact and bending resistance are stable. Q235B high-toughness, high-strength steel wire is specifically designed for high-end pig farms and heavy-duty fencing. With precise carbon content control, it has higher strength and is less prone to brittle fracture. Its tensile strength is 480–550 MPa, suitable for breeding pig pens and high-intensity areas for fattening pigs.
Wire diameter strength is the most direct indicator of Galvanized Hog Wire Fencing. Wire diameter directly affects its resistance to impact, compression, and bending. 1.5–2.0mm is considered lightweight mesh, suitable only for young livestock and small enclosures, not for fattening pigs. 2.0–2.5mm has medium strength, suitable for sheep pens, walls, and non-impact areas. 2.5–3.0mm is standard strength for pig farming fences, a general-purpose type. 3.0–4.0mm is high strength, suitable for fattening pig pens, main fences, and boundary fences. 4.0–5.0mm is ultra-high strength, suitable for breeding pig pens, boar pens, animal protection fences, and high-security areas. 5.0–6.0mm is special heavy-duty strength, suitable for prison-level security and large ranch outer fencing.
The strength of the mesh structure also affects the overall strength of the Galvanized Hog Wire Fencing. If the mesh design is unreasonable, even a thick mesh will deform. Larger mesh openings result in a weaker structure, making it more prone to deformation and dents from impacts. Smaller mesh openings result in a stronger structure and better impact resistance, but at a higher cost and with poorer ventilation. Square mesh openings distribute stress evenly and have stable strength. Rectangular mesh openings have high lateral strength but are slightly weaker longitudinal strength. Diamond mesh openings have good flexibility but are less impact-resistant than rectangular mesh openings.
Mainstream Galvanized Hog Wire Fencing typically uses fully automated resistance welding mesh. The strength of the weld points is the lifeline of the fence. Ordinary weld points should have a tensile strength of >=400N, standard pig fences >=600N, and high-strength pig fences >=800N. Insufficient weld strength will lead to weld breakage, detachment, and the mesh opening will scatter upon impact, causing horizontal and vertical wires to separate and the fence to fall apart.
Some mountain ranches choose woven fences when purchasing Galvanized Hog Wire Fencing. These have no weld points; their strength relies on the tightening force of the knots. Once tightened, the knots should not slip, deform, or loosen, and the tensile strength should be >=500N. The mesh should not enlarge upon impact, and the fence should not break or detach over long-term use. Woven fences have a continuous, integrated structure, eliminating the risk of weld point failure. They are flexible, suitable for mountainous and sloping terrain, and have strong resistance to localized impacts, making them less prone to breakage.